WO2023246211A1 - Appareil de projection laser et procédé d'affichage d'image de projection - Google Patents

Appareil de projection laser et procédé d'affichage d'image de projection Download PDF

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Publication number
WO2023246211A1
WO2023246211A1 PCT/CN2023/083825 CN2023083825W WO2023246211A1 WO 2023246211 A1 WO2023246211 A1 WO 2023246211A1 CN 2023083825 W CN2023083825 W CN 2023083825W WO 2023246211 A1 WO2023246211 A1 WO 2023246211A1
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WIPO (PCT)
Prior art keywords
frame rate
resolution
projection
display
projection image
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PCT/CN2023/083825
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English (en)
Chinese (zh)
Inventor
陈许
吴超
梁倩
Original Assignee
青岛海信激光显示股份有限公司
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Publication of WO2023246211A1 publication Critical patent/WO2023246211A1/fr

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Classifications

    • 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
    • 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
    • H04N9/3144—Cooling systems
    • 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
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • 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
    • H04N9/3188—Scale or resolution adjustment

Definitions

  • the present disclosure relates to the field of electronic technology, and in particular to a laser projection device and a method for displaying projected images.
  • the projected image can be projected onto the projection screen.
  • current laser projection equipment has low flexibility in displaying projected images.
  • Embodiments of the present disclosure provide a laser projection device and a method for displaying projected images, which can solve the problem in the related art that laser projection devices have low flexibility in displaying projected images.
  • the technical solutions are as follows:
  • the laser projection device includes: a system level chip and a display control chip; the system level chip includes: a mode determination module, a display frame rate determination module and a target frame rate determination module;
  • the mode determination module is respectively connected to the display frame rate determination module and the target frame rate determination module.
  • the mode determination module is used to receive the projection image sent by the video signal source and the frame rate of the projection image, and is used to If it is determined that the target frame rate mode of the laser projection device is in an off state, the received projection image and the frame rate of the projection image are sent to the display frame rate determination module, and if it is determined that the laser projection If the target frame rate mode of the device is on, the received projection image is sent to the target frame rate determination module;
  • the display frame rate determination module is connected to the display control chip and is used to determine the display frame rate of the projection image according to the frame rate of the projection image and the resolution of the projection image, and compare the projection image and The display frame rate is sent to the display control chip;
  • the display control chip is used to display the projection image on the projection screen according to the display frame rate
  • the target frame rate determination module is connected to the display control chip and is used to send the projection image and the target frame rate corresponding to the target frame rate mode to the display control chip;
  • the display control chip is also used to display the projection image on the projection screen according to the target frame rate.
  • a method for displaying projected images is provided, applied to laser projection equipment, the laser projection equipment includes: a system level chip and a display control chip; applied to laser projection equipment, the laser projection equipment includes: a system level Chip and display control chip; the system-level chip includes: a mode determination module, a display frame rate determination module and a target frame rate determination module; the method includes:
  • the mode determination module receives the projection image sent by the video signal source and the frame rate of the projection image
  • the mode determination module determines that the target frame rate mode of the laser projection device is in an on state, then the received projection image is sent to the target frame rate determination module;
  • the target frame rate determination module sends the projection image and the target frame rate corresponding to the target frame rate mode to the display control chip;
  • the display control chip displays the projection image on the projection screen according to the target frame rate
  • the mode determination module determines that the target frame rate mode of the laser projection device is in a closed state, then the received projection image and the frame rate of the projection image are sent to the display frame rate determination module;
  • the display frame rate determination module determines the display frame rate of the projection image according to the frame rate of the projection image and the resolution of the projection image, and sends the projection image and the display frame rate to the display control chip;
  • the display control chip displays the projection image on the projection screen according to the display frame rate.
  • a laser projection device including: a memory, a processor, and a computer program stored on the memory.
  • the processor executes the computer program, the display of the projection image as described in the above aspect is achieved. method.
  • a computer-readable storage medium In yet another aspect, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium, and the instructions are loaded and executed by a processor to implement the method for displaying a projected image as described in the above aspect.
  • a computer program product containing instructions which when the computer program product is run on the computer, causes the computer to execute the method for displaying a projected image described in the above aspect.
  • Embodiments of the present disclosure provide a laser projection device and a method for displaying a projected image.
  • the system-level chip can determine the frame rate for displaying the projected image in different ways according to the state of the target frame rate mode of the laser projection device, so that the display control
  • the chip uses different frame rates to display projected images, thereby improving the flexibility of projected image display.
  • Figure 1 is a schematic structural diagram of a laser projection device provided by an embodiment of the present disclosure
  • Figure 2 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • Figure 3 is a flow chart of a method for displaying a projected image provided by an embodiment of the present disclosure
  • Figure 4 is a schematic structural diagram of yet another laser projection device provided by an embodiment of the present disclosure.
  • Figure 5 is a schematic structural diagram of yet another laser projection device provided by an embodiment of the present disclosure.
  • Figure 6 is a flow chart of another method for displaying a projected image provided by an embodiment of the present disclosure.
  • Figure 7 is a schematic structural diagram of yet another laser projection device provided by an embodiment of the present disclosure.
  • Figure 8 is a schematic structural diagram of yet another laser projection device provided by an embodiment of the present disclosure.
  • Figure 9 is a flow chart of yet another method for displaying a projected image provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic structural diagram of yet another laser projection device provided by an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural diagram of a laser projection device provided by an embodiment of the present disclosure.
  • the projection device includes a housing 01 and a projection imaging system wrapped by the housing 01 .
  • the projection imaging system may include a light source part 021 , an optical-mechanical part 022 , and a lens part 023 .
  • the light source unit 021 is provided with a light source, which may be a laser light source, for example.
  • the opto-mechanical part 022 can modulate the light beam emitted by the light source to obtain a projection image to be projected and displayed.
  • the projection image to be projected and displayed can be projected to the projection screen through the projection lens in the lens part 023 to realize the display of the projection image.
  • FIG. 2 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure.
  • the laser projection device may include: a mainboard 100 , a display panel 200 and a power board 600 .
  • the power board 600 is connected to the main board 100 and the display board 200 respectively, and is used to power various devices or some modules on the main board 100 and the display board 200 , and is used to power other functional modules in the laser projection equipment, such as human eye protection modules. , fans and wireless-fidelity (WI-FI) modules.
  • the power board 600 may also be provided with a laser driving component for driving the laser light source to emit light.
  • the laser driving assembly can also be provided independently of the power board 00 .
  • the mainboard 100 is also connected to the display panel 200.
  • the mainboard 100 is used to receive the image data of the projected image sent by the front-end device and decode the image data.
  • the mainboard 100 can be provided with a system-level Chip (system on chip, SoC)11.
  • SoC system on chip
  • the system-on-a-chip 11 can decode image data in different data formats into a normalized format, and transmit the image data in the normalized format to the display panel 200 .
  • the mainboard 100 may transmit image data in a normalized format to the display panel 200 through a connector.
  • the mainboard 100 may also be called a television (television, TV) board.
  • the display panel 200 may be provided with an algorithm processing module field programmable gate array (FPGA) (not shown in Figure 2).
  • the algorithm processing module FPGA can process the image data of the input projection screen, such as motion estimation and motion compensation (motion estimation and motion compensation, MEMC) frequency doubling processing or image correction processing.
  • the display panel 200 may also be provided with a display control chip 21 .
  • the display control chip 21 can be connected to the algorithm processing module FPGA, and is used to receive the processed image data of the projection screen, and use the processed projection screen as the projection screen to be displayed.
  • the display panel 200 may not include an algorithm processing module FPGA.
  • the display control chip 21 can be directly connected to the motherboard 100 , and the display control chip 21 can directly receive the projected image transmitted by the motherboard 100 .
  • the display control chip 21 may be a light valve control chip (not output in FIG. 2 ).
  • the light valve control chip can be a digital light processing (DLP) chip.
  • the DLP chip can output a driving signal to the light source to control the light source to emit light.
  • the driving signal may include an image enable signal and a brightness adjustment signal.
  • the image enable signal may also be called a primary color light enable signal.
  • the primary color light enable signal can be expressed as X_EN, where X is the abbreviation of different primary color lights.
  • the primary color light enable signal is used to control whether the light source emits light (that is, whether to light up), so as to control the lighting timing of multiple light sources of different colors.
  • the brightness adjustment signal may be a pulse width modulation (pulse width modulation, PWM) signal, which is used to control the luminous brightness of the light source.
  • PWM pulse width modulation
  • the display panel 200 may also be provided with a light modulation device (not shown in FIG. 2 ).
  • the light modulation device can be a digital micromirror device (DMD), and the digital micromirror device can also be called a light valve.
  • the display control chip 21 can generate a modulation driving signal for driving the light modulation device based on the projection image to be projected and displayed, and generate a driving signal for driving the light source to emit light. Based on this, the light modulation device can modulate the light beam emitted by the light source under the control of the modulation drive signal to obtain the image light beam of the projected image.
  • the image beam can be projected to the projection screen through the projection lens to display the projected image.
  • FIG. 3 is a flow chart of a method for displaying a projected image provided by an embodiment of the present disclosure.
  • the method can be applied to a laser projection device, for example, to the laser projection device shown in FIG. 1 or 2 .
  • the laser projection device may include a system-level chip 11 and a display control chip 21 .
  • the system-on-chip 21 includes: a mode determination module 112 , a display frame rate determination module 113 and a target frame rate determination module 116 .
  • the method includes:
  • Step 101 The mode determination module receives the projection image sent by the video signal source and the frame rate of the projection image.
  • the mode determination module 112 in the system-on-chip 21 may receive the projection image sent by the video signal source and the frame rate of the projection image.
  • the frame rate refers to the frequency with which a projected image continuously appears on the projection screen in units of frames, or it can be understood as: the number of projected images displayed on the projection screen per second.
  • the video signal source may be a signal source that establishes a communication connection with the system-on-chip 21 .
  • Step 102 If the mode determination module determines that the target frame rate mode of the laser projection device is on, it sends the projected image to the target frame rate determination module.
  • the mode determination module 112 is connected to the target frame rate determination module 116. After receiving the projection image sent by the video signal source and the frame rate of the projection image, the mode determination module 112 can detect the target of the laser projection device. Whether frame rate mode is on. If the target frame rate mode of the laser projection device is on, the projected image can be sent to the target frame rate determination module 116 .
  • the corresponding relationship between the target frame rate mode and the target frame rate may be stored in the mode determination module 112 in advance.
  • the target frame rate mode may be a preset frame rate mode in the laser projection device, and the target frame rate mode is used to instruct the system-level chip to determine the frame rate for displaying the projected image.
  • the target frame rate mode is in different states, then the mode determination module 112 There are different ways of determining the frame rate for displaying the projected image.
  • Step 103 The target frame rate determination module sends the projection image and the target frame rate corresponding to the target frame rate mode to the display control chip.
  • the target frame rate determination module 116 may pre-store the corresponding relationship between the target frame rate mode and the target frame rate. The target frame rate determination module 116 may determine the target frame rate corresponding to the target frame rate mode based on the corresponding relationship. Afterwards, the target frame rate determination module 116 may send the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip 21 .
  • the target frame rate mode may be a preset frame rate mode in the laser projection device.
  • the target frame rate mode is used to instruct the target frame rate determination module 116 in the system-level chip 11 to determine the frame rate for displaying the projected image. Way. If the target frame rate mode is in different states, the target frame rate determination module 116 determines the frame rate for displaying the projected image in different ways.
  • Step 104 The display control chip displays the projection image on the projection screen according to the target frame rate.
  • the display control chip 21 After receiving the projection image and the target frame rate sent by the target frame rate determination module 116 in the system-level chip 11 , the display control chip 21 can display the projection image on the projection screen according to the target frame rate.
  • Step 105 If the mode determination module determines that the target frame rate mode of the laser projection device is in a closed state, it sends the received projection image and the frame rate of the projection image to the display frame rate determination module.
  • the mode determination module 112 is also connected to the display frame rate determination module 113 . If the mode determination module 112 determines that the target frame rate mode of the laser projection device is in a closed state, it may send the received projection image and the frame rate of the projection image to the display frame rate determination module 113 .
  • Step 106 The display frame rate determination module determines the display frame rate of the projected image according to the frame rate of the projected image and the resolution of the projected image, and sends the projected image and the display frame rate to the display control chip.
  • the display frame rate determination module is also connected to the display control chip 21 .
  • the display frame rate determination module 113 can determine the display frame rate of the projected image according to the frame rate of the projected image and the resolution of the projected image, and send the projected image and the display frame rate to the display control chip 21 .
  • Step 107 The display control chip displays the projection image on the projection screen according to the display frame rate.
  • the display control chip 21 After receiving the projection image and the display frame rate sent by the display frame rate determination module 113 in the system-level chip 11, the display control chip 21 can display the projection image on the projection screen according to the display frame rate.
  • the system level chip 11 can send the target frame rate corresponding to the target frame rate mode to the display control chip 21 so that the display control chip 21 Display the projected image using this target frame rate. Therefore, whether it is a game screen or a movie viewing screen, it is displayed according to the target frame rate, thereby ensuring low latency of the displayed projected image with a lower frame rate.
  • the system level chip 11 can send the display frame rate determined according to the resolution and frame rate of the projected image to the display control chip 21 so that the display control chip 21 adopts the display
  • the frame rate displays the projected image. Since the frame rates of the game screen and the viewing screen are different, the game screen can be displayed at a higher frame rate to ensure low latency of the game screen. For movie viewing, a lower frame rate can be used.
  • embodiments of the present disclosure provide a method for displaying projected images.
  • the system-level chip can determine the frame rate for displaying the projected image in different ways according to the state of the target frame rate mode of the laser projection device. This allows the display control chip to display the projected image using different frame rates, thereby improving the flexibility of the projected image display.
  • FIG. 6 is a flow chart of another method for displaying projected images provided by an embodiment of the present disclosure. This method can be applied to the laser projection equipment shown in Figure 1, Figure 2, Figure 4 or Figure 5, as shown in Figure 2.
  • the laser projection device may include a system-level chip 11 and a display control chip 21 .
  • the system-on-chip 21 includes: a mode determination module 112 , a display frame rate determination module 113 and a target frame rate determination module 116 .
  • the projection device may also have a galvanometer 22 connected to the display control chip 21 .
  • the method may include:
  • Step 201 The mode determination module receives the projection image sent by the video signal source and the frame rate of the projection image.
  • the mode determination module 112 in the system-on-chip 11 may receive the information established with the system-on-chip 11 The projected image sent by the video signal source connected by independent communication and the frame rate of the projected image.
  • the frame rate refers to the frequency at which projected images in frame units continuously appear on the projection screen, or can be understood as: the number of projected images displayed on the projection screen per second.
  • the video signal source may be one of an external signal source, a digital television signal source and a network video signal source.
  • the external signal source can be a game device, a computer, a mobile phone, or other devices.
  • the laser projection device may include a motherboard 100.
  • the system-level chip 11 may be located on the motherboard 100.
  • the motherboard 100 is provided with a high-definition multimedia interface (HDMI) and a universal serial port.
  • HDMI high-definition multimedia interface
  • USB universal serial port
  • the network video signal source can be a background server of an application installed in the laser projection device. Examples of the application could be fitness, video calling, and search applications.
  • the digital television signal source may include television channels.
  • the frame rates of the projected images provided by the different video signal sources may be different.
  • the HDMI can be connected to a gaming device.
  • the frame rate of projected images provided by gaming devices is typically greater than the frame rates of projected images provided by other video sources.
  • the other video signal sources are external signal sources, digital TV signal sources and network video signal sources other than game devices.
  • the frame rate of the projected image sent by the game device may be 240 Hertz (Hz).
  • the frame rate of the projected image provided by the network video signal source can be 50Hz.
  • the motherboard 100 may also be provided with a signal source switching switch 12 .
  • One end of the signal source switching switch 12 is connected to any one of the plurality of interfaces, and the other end is connected to the system-level chip 11 .
  • the system-level chip 11 After detecting that the system-level chip 11 has established a communication connection with the target video signal source, the system-level chip 11 can conduct the signal source switching switch 12 with the target interface among the multiple interfaces, so that the target video signal source communicates with the system-level chip through the target interface. 11Send the projected image and the frame rate of the projected image. Wherein, the target interface corresponds to the target video signal source. Therefore, the mode determination module 112 in the system-on-chip 11 can receive the projection image and the frame rate of the projection image.
  • Step 202 The mode determination module detects whether the target frame rate mode of the laser projection device is on.
  • the mode determination module 112 may detect whether the target frame rate mode of the laser projection device is on. If it is determined that the target frame rate mode of the laser projection device is in an on state, the mode determining module 112 may perform step 203. If it is determined that the target frame rate mode of the laser projection device is in an off state, the mode determining module 112 may perform step 210.
  • the system-on-chip 21 may display the frame rate setting interface in response to the frame rate setting instruction.
  • the frame rate mode setting interface may display a switch button for the target frame rate mode. If the system-level chip receives an instruction to turn on the switch button of the target frame rate mode, it can record that the target frame rate mode of the laser projection device is turned on. If the system-on-chip 21 receives a close instruction for the switch button of the target frame rate mode, it can record that the target frame rate mode of the laser projection device is in a closed state.
  • the mode determination module 112 in the system-on-chip 21 can determine whether the target frame rate mode is on based on the recorded status of the target frame rate mode.
  • Step 203 The mode determination module sends the received projection image to the target frame rate determination module.
  • the mode determination module 112 is also connected to the target frame rate determination module 116. In the above step 202, if the mode determination module 112 determines that the target frame rate mode of the laser projection device is in the on state, it can receive the The projected image is sent to the target frame rate determination module 116.
  • Step 204 The target frame rate determination module sends the projection image and the target frame rate corresponding to the target frame rate mode to the resolution adjustment module.
  • the target frame rate determination module 116 is also connected to the resolution adjustment module 114 .
  • the target frame rate determination module 116 may pre-store the corresponding relationship between the target frame rate mode and the target frame rate.
  • the target frame rate determination module 116 may determine the target frame rate corresponding to the target frame rate mode based on the corresponding relationship. For example, the target frame rate could be 120Hz.
  • the target frame rate determination module 116 may send the projected image and the target frame rate corresponding to the target frame rate mode to the branch.
  • Resolution adjustment module 114 may be used to send the projected image and the target frame rate corresponding to the target frame rate mode to the branch.
  • the target frame rate mode may be a preset frame rate mode in the laser projection device.
  • the target frame rate mode is used to instruct the target frame rate determination module 116 in the system-level chip 21 to determine the frame rate for displaying the projected image. Way. If the target frame rate mode is in different states, the target frame rate determination module 116 determines the frame rate for displaying the projected image in different ways.
  • Step 205 The resolution adjustment module detects whether the resolution of the projected image is different from the resolution of the projection screen.
  • the resolution adjustment module 114 may detect whether the resolution of the projection image is different from the resolution of the projection screen. If it is determined that the resolution of the projected image is different from the resolution of the projection screen, the resolution adjustment module 114 may perform step 206. If it is determined that the resolution of the projected image is the same as the resolution of the projection screen, the resolution adjustment module 114 may perform step 207.
  • the resolution adjustment module 114 in the system-on-chip 11 may store the resolution of the projection screen in advance.
  • the resolution of the projection screen may be 1080 ⁇ 1920.
  • 1080 is the number of pixel rows of the projection screen
  • 1920 is the number of pixel columns of the projection screen.
  • the system-level chip can perform step 206 .
  • Step 206 The resolution adjustment module adjusts the resolution of the projected image to the resolution of the projection screen.
  • the resolution adjustment module 114 in the system-on-chip 11 determines that the resolution of the projected image is different from the resolution of the projection screen, it can adjust the resolution of the projected image to the resolution of the projection screen.
  • the resolution adjustment module 114 may reduce the resolution of the projected image so that the resolution of the projected image is equal to the resolution of the projection screen. If it is determined that the resolution of the projected image is smaller than the resolution of the projection screen, the resolution of the projected image can be increased so that the resolution of the projected image is equal to the resolution of the projection screen.
  • the resolution of the projected image can be 2160 ⁇ 3840 and the resolution of the projection screen can be 1080 ⁇ 1920. Since the resolution of the projected image is larger than the resolution of the projection screen, the system-level chip can reduce the resolution of the projection screen. The resolution of the image so that the resolution of the projected image is 1080 ⁇ 1920.
  • Step 207 The resolution adjustment module sends the projected image and target frame rate to the light valve control chip.
  • the display control chip 21 may include a light valve control chip 212 . If the resolution adjustment module 114 determines that the resolution of the projection image is the same as the resolution of the projection screen, it can directly send the projection image and the target frame rate to the light valve control chip 212 in the display control chip 21 . If the resolution adjustment module 114 determines that the resolution of the projection image is different from the resolution of the projection screen, it may send the adjusted projection image and the target frame rate to Light valve control chip 212.
  • the system-on-chip 11 may also include an image processing module 111 and a format conversion module 115 .
  • the image processing module 111 is connected to the signal source switch 12 and the mode determination module 112 respectively.
  • the image processing module 111 is used to perform color gamut conversion, brightness, contrast and high dynamic range (HDR) of the received projection image. ) processing. And the processed projection image is sent to the mode determination module 112.
  • HDR high dynamic range
  • the display frame rate determination module 113 is connected to the resolution adjustment module 114 and the format conversion module 115 respectively.
  • the display frame rate determination module 113 can determine the display frame rate according to the resolution of the received projection image and the frame rate of the projection image. If the determined display frame rate is the reference frame rate, the projection image and the display frame rate are sent to the resolution Rate adjustment module 114. If the determined display frame rate is the frame rate of the projection image, the projection image and the display frame rate are sent to the format conversion module 115 .
  • the display frame rate determination module 113 determines the display frame rate as the reference frame rate and sets the projection The image and display frame rate are sent to the resolution adjustment module 114.
  • the frame rate determination module is displayed 113 determines the display frame rate to be the frame rate of the projected image, and sends the projected image and the display frame rate to the format conversion module 115 .
  • the format conversion module 115 is used to convert the received projection image and frame rate into a format that can be recognized by the light valve control chip 211 in the display control chip 21 , and send the converted projection image and frame rate to the display light valve control chip 211 .
  • the resolution of the projection image sent by the format conversion module 115 to the display control chip 21 may be 2160 ⁇ 3840 and the frame rate is 60Hz, or the resolution may be 1080 ⁇ 1920 and the frame rate is 240Hz, or the resolution The rate can be 1080 ⁇ 1920, and the frame rate is 120Hz.
  • Step 208 The light valve control chip divides the adjusted projection image into multiple frame sub-images, and sends the galvanometer driving signal to the galvanometer driver.
  • the laser projection device also includes a galvanometer 22 and a galvanometer driver 24 , and the light valve control chip 212 is also connected to the galvanometer driver 24 .
  • the light valve control chip 212 can divide the projection image into multiple frame sub-images,
  • the laser projection device may further include a light source driving assembly 300 , a light source 400 and a light valve 500 .
  • the display control chip 21 may also include an image quality processing module 211 and a main control circuit 213 .
  • the laser projection device may also include an input interface 23 and a galvanometer driver 24 located on the display panel 200 .
  • the signal input interface 23 is connected to the system-on-chip 11 and the image quality processing module 211 respectively.
  • the signal input interface 23 is used to receive the projection image and frame rate transmitted by the system-on-chip 11 .
  • the image quality processing module 211 is connected to the light valve control chip 212 and is used to process the brightness, contrast, color and sharpness of the projection image received by the signal input interface 23, and send the frame rate and processed projection image to Light valve control chip 212.
  • Step 209 Under the control of the galvanometer driving signal, the galvanometer driver controls the galvanometer to deflect to different positions according to the target frame rate, so that the galvanometer projects the multi-frame sub-images to different positions on the projection screen.
  • the resolution of the projected image is the same as the resolution of the projection screen.
  • the light valve control chip 212 is also connected to the main control circuit 213, the light source driving assembly 300 and the light valve 500.
  • the light valve control chip 212 is also used if the resolution of the received projection image is the reference resolution.
  • the frame rate of the projected image is the reference frame rate, then the projected image is divided into multiple frame sub-images, and the light valve control signal generated according to the pixel value of each frame sub-image is sent to the light valve 500 and to the galvanometer driver 24 Send the galvanometer drive signal.
  • the light valve control chip 212 is also used to send the light valve control signal generated according to the pixel value of the projected image to the light valve 500 if the resolution of the received projection image is not the reference resolution, and does not send the light valve control signal to the galvanometer driver. 24 sends the galvanometer drive signal.
  • the light valve control chip 212 is also used to send image display instructions to the main control circuit 213 and send duty cycle signals to the light source driving assembly 300 .
  • the duty cycle signal represents the weight proportion of each primary color in a complete color cycle signal among the three primary colors. If the resolution of the received projection image is the reference resolution and the frame rate of the projection image is the reference frame rate, the frequency of the duty cycle signal is the same as the deflection frequency of the galvanometer. If the resolution of the received projected image is not the reference resolution, the frequency of the duty cycle signal is the same as the frame rate sent by the system-on-chip.
  • the main control circuit 213 is also connected to the light source driving component 300 and is used to send PWM signals of three primary colors to the light source driving component 300 in response to image display instructions.
  • This PWM signal represents the brightness value of each primary color.
  • the light source driving component 300 is used to drive the light source 400 to periodically emit light beams in response to the duty cycle signal and the pulse width modulation signal.
  • the light valve 500 modulates the light beam illuminated by the light source 400 on its surface into an image beam, and projects the image beam to the projection screen through the projection lens to display the image.
  • Step 210 The mode determination module sends the received projection image and the frame rate of the projection image to the display frame rate determination module 113.
  • the mode determination module 112 may send the received projection image and the frame rate of the projection image to the display frame rate determination module 113.
  • Step 211 The display frame rate determination module determines the display frame rate of the projection image according to the frame rate of the projection image and the resolution of the projection image.
  • the process of determining the display frame rate of the projection image by the display frame rate determination module 113 according to the frame rate of the projection image and the resolution of the projection image may include the following steps:
  • Step 2111 Detect whether the frame rate of the projected image is greater than or equal to the frame rate threshold, and whether the resolution of the projected image is the same as the resolution of the projection screen.
  • the display frame rate determination module 113 determines that the target frame rate mode of the laser projection device is off, it can detect whether the frame rate of the projected image is greater than or equal to the frame rate threshold, and whether the resolution of the projected image is the same as the resolution of the projection screen. .
  • the display frame rate determination module 113 in the system-on-chip 21 may have a frame rate threshold stored in advance.
  • the frame rate threshold may be 240Hz.
  • Step 2113 If the display frame rate determination module 113 determines that the frame rate of the projected image is greater than or equal to the frame rate threshold, and the resolution of the projected image is the same as the resolution of the projection screen, it can determine that the current mode of the laser projection device is the game mode, and then execute Step 2112. If the display frame rate determination module 113 determines that the frame rate of the projected image is less than the frame rate threshold, and/or the resolution of the projected image is different from the resolution of the projection screen, it can determine that the current mode of the laser projection device is the viewing mode, and then Step 2113 can be performed.
  • the display frame rate determination module 113 determines that the frame rate of the projected image is greater than or equal to the frame rate threshold, it can determine that the projected image is a game screen. Since the frame rate of the projection image is relatively high, displaying the projection image according to the frame rate of the projection image can ensure low latency. And since the resolution of the projected image is the same as the resolution of the projection screen, there is no need to adjust the resolution of the projected image to display the projected image on the projection screen, thereby further ensuring a low cost when displaying the projected image in game mode. Delay to ensure a better user experience.
  • Step 2112 Determine the frame rate of the projected image as the display frame rate.
  • the frame rate of the projected image may be determined as the display frame rate.
  • the frame rate of the projected image may be 240Hz.
  • the display frame rate determination module 113 can directly determine the frame rate of the projected image as the display frame rate, thereby ensuring that the frame rate of the projected image is displayed. Low latency.
  • the system-on-chip can determine the display frame rate to be 240Hz.
  • Step 2113 Determine the reference frame rate as the display frame rate.
  • the reference frame rate may be determined as the display frame rate. Wherein, the reference frame rate is less than the frame rate threshold.
  • the reference frame rate may be 60Hz.
  • the system-on-chip can determine the display frame rate to be 60Hz.
  • Step 212 The display frame rate determination module sends the projected image and display frame rate to the resolution adjustment module.
  • the display frame rate determination module 113 is connected to the resolution adjustment module 114 and the format conversion module 115 respectively. In the above step 211, if the display frame rate determination module 113 determines that the display frame rate is the reference frame rate, then the projected image and the display frame rate are sent to the resolution adjustment module 114. If the determined display frame rate is the frame rate of the projection image, the projection image and the display frame rate are sent to the format conversion module 115 .
  • the display frame rate determination module 113 determines the display frame rate as the reference frame rate and sets the projection The image and display frame rate are sent to the resolution adjustment module 114.
  • the display frame rate determination module 113 determines the display frame rate as the frame rate of the projection image, and sends the projection image and the display frame rate to Format conversion module 115.
  • Step 213 If the resolution adjustment module determines that the resolution of the projected image is different from the reference resolution, it adjusts the projection image.
  • the resolution of the image is the reference resolution, and the adjusted projection image and display frame rate are sent to the light valve control chip.
  • the resolution adjustment module 114 may first detect whether the resolution of the projection image is different from the reference resolution. If the resolution adjustment module 114 determines that the resolution of the projected image is different from the reference resolution, it can adjust the resolution of the projected image to the reference resolution, and send the adjusted projected image to the light valve control in the display control chip 21 Chip 212. If the resolution adjustment module 114 determines that the resolution of the projected image is the same as the reference resolution, it does not need to adjust the resolution of the projected image to the reference resolution, and directly sends the projected image to the light valve control chip 212 .
  • the reference resolution is greater than the resolution of the projection screen.
  • the reference resolution can be pre-stored in the system-on-chip.
  • the reference resolution may be 2160 ⁇ 3840.
  • the resolution adjustment module 114 may increase the resolution of the projected image so that the resolution of the projected image is equal to the reference resolution. If the resolution adjustment module 114 determines that the resolution of the projected image is greater than the reference resolution, it can reduce the resolution of the projected image so that the resolution of the projected image is equal to the reference resolution.
  • Step 214 The light valve control chip divides the adjusted projection image into multiple frame sub-images, and sends the galvanometer driving signal to the galvanometer driver.
  • step 208 For the implementation process of this step, reference can be made to the above description of step 208, which will not be described again in this application.
  • Step 215 The galvanometer driver controls the galvanometer to deflect to different positions under the control of the galvanometer drive signal, so that the galvanometer projects the multi-frame sub-images to different positions on the projection screen.
  • the display control chip 21 if the display control chip 21 receives the display frame rate sent by the system-level chip 11 as the frame rate of the projected image, the display control chip 21 can display the received frame rate on the projection screen according to the frame rate of the projected image. projected image. If the display control chip 21 receives the display frame rate sent by the system-level chip as the reference frame rate, it can display the received projection image on the projection screen according to the reference frame rate.
  • the galvanometer driver 24 can control the galvanometer 22 to deflect to different positions according to the deflection frequency.
  • the deflection frequency may be the product of the number of multi-frame sub-images and the reference frame rate. For example, if the reference frequency is 60Hz and the number of multi-frame sub-images is 4, then the deflection frequency is 60Hz ⁇ 4, that is, 240Hz.
  • the system-on-chip 11 determines that the frame rate of the projected image is less than the frame rate threshold, and/or, the resolution of the projected image is different from the projection After the screen resolution is different. If it is determined that the resolution of the projected image is smaller than the reference resolution, the resolution of the projected image is increased to the reference resolution.
  • the display control chip 21 divides the projection image into multiple frames of sub-images, and controls the galvanometer to display the multiple frames of sub-images to different positions on the projection screen, thereby displaying the high-resolution image on a low-resolution projection screen. High-efficiency projected images improve the image display effect.
  • the resolution of the projected image can be increased to ensure that the resolution of the displayed projected image is higher, thereby providing users with better Movie viewing effect.
  • game mode by using the frame rate of the projected image to display the projected image within the projected image, low latency is ensured when displaying the projected image.
  • the target frame rate corresponding to the target frame rate mode is less than the frame rate threshold and greater than the reference frame rate. Therefore, if the projected image is a game screen, even if the resolution of the projected image is smaller than the resolution of the projection screen, the resolution of the projected image can be increased to the resolution of the projection screen, and the projected image can be displayed at the target frame rate. , thus ensuring the low latency of the projected image and the display effect of the image.
  • the resolution of the projected image is a viewing screen
  • the resolution of the projected image is adjusted to the resolution of the projection screen and the projected image is displayed according to the target frame rate, thereby ensuring
  • the display effect of the image can also ensure low latency of image display.
  • the laser projection device may also include a power supply circuit 25 , a light valve power supply component 26 , a socket 27 , a program storage component 28 , a memory 29 , a heat dissipation component 30 and an external component 700 .
  • the power board 600 is connected to the system level chip 11, the light source driving component 300, the power supply circuit 25 and the light valve power supply component 26 respectively.
  • the power supply circuit 25 is also connected to the light valve control chip 212.
  • the socket 27 is respectively connected to the light valve power supply component 26 and the light valve power supply component 26.
  • Valve 500 is connected.
  • the power board 600 can be used to provide power signals for the system-on-chip 11 , the light source driving component 300 , the power supply circuit 25 and the light valve power supply component 26 .
  • the power supply circuit 25 is used to supply power to the light valve control chip 212 .
  • the light valve power supply assembly 26 is used to power the light valve 500 through the socket 27 .
  • the program storage component 28 is connected to the light valve control chip 212. After the light valve control chip 212 is powered on, it can read the program from the external program storage component 28 for initialization.
  • the heat dissipation assembly 30 may include at least one fan and at least one temperature sensor.
  • the at least one fan is used to dissipate heat from internal components of the laser projection device.
  • the at least one temperature sensor is used to detect the internal temperature of the laser projection device.
  • the external component 700 is connected to the motherboard 100.
  • the external component 700 may be a camera, an infrared sensor, an acceleration sensor, a gyroscope, an optical fiber, etc. connected to the motherboard 100.
  • embodiments of the present disclosure provide a method for displaying projected images.
  • the system-level chip can determine the frame rate for displaying the projected image in different ways according to the state of the target frame rate mode of the laser projection device. This allows the display control chip to display the projected image using different frame rates, thereby improving the flexibility of the projected image display.
  • Embodiments of the present disclosure provide a laser projection device that can perform the projection image display method provided by the above method embodiment (for example, the method shown in FIG. 3 or FIG. 6 ).
  • the laser projection device includes: a system-level chip 11 and a display control chip 21 .
  • the system-on-a-chip 21 includes: a mode determination module 112 , a display frame rate determination module 113 and a target frame rate determination module 116 .
  • the mode determination module 112 is connected to the display frame rate determination module 113 and the target frame rate determination module respectively.
  • the mode determination module 112 is used to receive the projection image sent by the video signal source and the frame rate of the projection image, and is used to determine the target of the laser projection device. If the frame rate mode is in the off state, then the received projection image and the frame rate of the projection image are sent to the display frame rate determination module 113, and if it is determined that the target frame rate mode of the laser projection device is in the on state, then the received projection image is sent to the display frame rate determination module 113. The image is sent to target frame rate determination module 116.
  • the display frame rate determination module 113 is connected to the display control chip 21 and is used to determine the display frame rate of the projected image according to the frame rate of the projected image and the resolution of the projected image, and send the projected image and the display frame rate to the display control chip 21 .
  • the display control chip is used to display the projected image on the projection screen according to the display frame rate.
  • the target frame rate determination module 116 is connected to the display control chip 21 and is used to send the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip 21 .
  • the display control chip 21 is also used to display the projection image on the projection screen according to the target frame rate.
  • embodiments of the present disclosure provide a laser projection device.
  • the system-level chip in the laser projection device can determine the frame rate for displaying the projected image in different ways according to the state of the target frame rate mode of the laser projection device. This allows the display control chip to display the projected image using different frame rates, thereby improving the flexibility of the projected image display.
  • the display frame rate determination module 113 is configured to: if it is determined that the frame rate of the projected image is greater than or equal to the frame rate threshold, and the resolution of the projected image is the same as the resolution of the projection screen, then the frame of the projected image The rate is determined as the display frame rate. If the frame rate of the projected image is less than the frame rate threshold, and/or the resolution of the projected image is different from the resolution of the projection screen, the reference frame rate is determined as the display frame rate. Wherein, the reference frame rate is less than the frame rate threshold.
  • the laser projection device also includes a galvanometer 22 and a galvanometer driver 24, and the system-level chip 11 also includes: a resolution adjustment module 114, a display control chip 21 Includes: light valve control chip 212.
  • the display frame rate determination module 113 is also connected to the resolution adjustment module 114 for determining the display frame rate according to the resolution of the received projection image and the frame rate of the projection image, and if the determined display frame rate is the reference frame rate, then The projected image and display frame rate are sent to the resolution adjustment module 114.
  • the resolution adjustment module 114 is also connected to the light valve control chip 212, and is used to adjust the resolution of the projected image to the reference resolution if it is determined that the resolution of the projected image is different from the reference resolution, and to display the adjusted projected image.
  • the frame rate is sent to the light valve control chip 212, and the reference resolution is greater than the resolution of the projection screen.
  • the light valve control chip 212 is also connected to the galvanometer driver 24.
  • the light valve control chip 212 is used to divide the adjusted projection image into multiple frame sub-images and send the galvanometer drive signal to the galvanometer driver 24.
  • the galvanometer driver 24 is also connected to the galvanometer 22.
  • the galvanometer driver 24 is used to control the galvanometer 22 to deflect to different positions under the control of the galvanometer drive signal, so that the galvanometer projects multiple frames of sub-images onto the projection screen. at different locations.
  • the galvanometer driver 24 is used to control the deflection of the galvanometer 22 to different positions according to the deflection frequency.
  • the deflection frequency is the product of the number of multi-frame sub-images and the reference frame rate.
  • the target frame rate is less than the frame rate threshold and greater than the reference frame rate.
  • the light valve control chip 212 is used to divide the adjusted projection image into multiple frame sub-images, and send a galvanometer driving signal to the galvanometer driver 24 .
  • embodiments of the present disclosure provide a laser projection device.
  • the system-level chip in the laser projection device can determine the frame rate for displaying the projected image in different ways according to the state of the target frame rate mode of the laser projection device. This allows the display control chip to display the projected image using different frame rates, thereby improving the flexibility of the projected image display.
  • Embodiments of the present disclosure provide a laser projection device, including: a memory, a processor, and a computer program stored in the memory.
  • the processor executes the computer program, the method for displaying a projected image as described above is implemented.
  • Embodiments of the present disclosure provide a computer-readable storage medium. Instructions are stored in the computer-readable storage medium, and the instructions are loaded and executed by a processor to implement the method for displaying a projected image as described above.
  • Embodiments of the present disclosure provide a computer program product containing instructions, which when the computer program product is run on a computer, causes the computer to perform the projection image display method of the above aspect.

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  • Optics & Photonics (AREA)
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Abstract

La présente demande appartient au domaine technique de l'électronique. Sont divulgués dans la présente demande un appareil de projection laser et un procédé d'affichage d'image de projection. Une puce de niveau système dans l'appareil de projection laser peut déterminer une fréquence de trame pour l'affichage d'une image de projection au moyen de différents procédés selon l'état d'un mode de fréquence de trame cible de l'appareil de projection laser, de sorte qu'une puce de commande d'affichage affiche l'image de projection au moyen de différentes fréquences de trame, améliorant ainsi la flexibilité d'affichage de l'image de projection.
PCT/CN2023/083825 2022-06-22 2023-03-24 Appareil de projection laser et procédé d'affichage d'image de projection WO2023246211A1 (fr)

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CN114979602A (zh) * 2022-06-22 2022-08-30 青岛海信激光显示股份有限公司 激光投影设备及投影图像的显示方法
CN115348474B (zh) * 2022-10-14 2023-04-18 深圳市欣喜连连科技有限公司 一种图像通道切换自动匹配方法、装置和智能相框

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JP2019133068A (ja) * 2018-02-01 2019-08-08 キヤノン株式会社 投影装置およびその制御方法ならびにプログラム
CN110602470A (zh) * 2019-09-20 2019-12-20 青岛海信激光显示股份有限公司 投影显示系统及其控制方法
CN113376949A (zh) * 2020-02-25 2021-09-10 青岛海信激光显示股份有限公司 激光投影系统、投影屏幕的上升和下降控制方法
CN114979602A (zh) * 2022-06-22 2022-08-30 青岛海信激光显示股份有限公司 激光投影设备及投影图像的显示方法

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JP2019133068A (ja) * 2018-02-01 2019-08-08 キヤノン株式会社 投影装置およびその制御方法ならびにプログラム
CN110602470A (zh) * 2019-09-20 2019-12-20 青岛海信激光显示股份有限公司 投影显示系统及其控制方法
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CN114979602A (zh) * 2022-06-22 2022-08-30 青岛海信激光显示股份有限公司 激光投影设备及投影图像的显示方法

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