Laser projection apparatus and display method of projected image

Abstract

The invention discloses laser projection equipment and a display method of a projected image, and belongs to the technical field of electronics. According to the embodiment of the invention, the system-on-chip in the laser projection equipment can determine the frame rate for displaying the projection image by adopting different modes according to the state of the target frame rate mode of the laser projection equipment, so that the display control chip can display the projection image by adopting different frame rates, and the display flexibility of the projection image is improved.

Description

Laser projection device and method for displaying projected images

[0001] This application claims priority to Chinese patent application No. 202210716159.8, filed on June 22, 2022, entitled “Laser projection equipment and method for displaying projected images,” the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of electronic technology, and in particular to a laser projection device and a method for displaying a projected image. Background Art

[0003] After the laser light emitted by the laser projection device is projected onto the projection screen, a projection image can be projected onto the projection screen. However, the current laser projection device has low flexibility in displaying the projection image.

[0004] Summary of the Invention

[0005] The embodiments of the present disclosure provide a laser projection device and a method for displaying a projected image, which can solve the problem of low flexibility in displaying projected images by laser projection devices in related technologies. The technical solution is as follows:

[0006] In one aspect, a laser projection device is provided, comprising: a system-on-chip and a display control chip; the system-on-chip comprising: a mode determination module, a display frame rate determination module, and a target frame rate determination module;

[0007] The mode determination module is connected to the display frame rate determination module and the target frame rate determination module respectively, and is used to receive a projection image and a frame rate of the projection image sent by a video signal source, and to send the received projection image and the frame rate of the projection image to the display frame rate determination module if it is determined that the target frame rate mode of the laser projection device is in an off state, and to send the received projection image to the target frame rate determination module if it is determined that the target frame rate mode of the laser projection device is in an on state;

[0008] 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 send the projection image and the display frame rate to the display control chip;

[0009] The display control chip is used to display the projection image on the projection screen according to the display frame rate;

[0010] The target frame rate determination module is connected to the display control chip 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;

[0011] The display control chip is further configured to display the projection image on a projection screen according to the target frame rate.

[0012] On the other hand, a method for displaying a projected image is provided, which is applied to a laser projection device, wherein 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 method includes:

[0013] The mode determination module receives a projection image sent by a video signal source and a frame rate of the projection image;

[0014] If the mode determination module determines that the target frame rate mode of the laser projection device is in the on state, the received projection image is sent to the target frame rate determination module;

[0015] The target frame rate determination module sends the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip;

[0016] The display control chip displays the projection image on the projection screen according to the target frame rate;

[0017] If the mode determination module determines that the target frame rate mode of the laser projection device is in an off state, the mode determination module sends the received projection image and the frame rate of the projection image to the display frame rate determination module;

[0018] 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;

[0019] The display control chip displays the projection image on the projection screen according to the display frame rate.

[0020] On the other hand, a laser projection device is provided, comprising: a memory, a processor and a computer program stored in the memory, wherein when the processor executes the computer program, the method for displaying the projection image as described in the above aspects is implemented.

[0021] On the other hand, a computer-readable storage medium is provided, wherein 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 projection image as described in the above aspects.

[0022] On the other hand, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the method for displaying a projection image as described in the above aspects.

[0023] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0024] The 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 chip displays the projected image at different frame rates, thereby improving the flexibility of the projection image display. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] FIG1 is a schematic structural diagram of a laser projection device provided by an embodiment of the present disclosure;

[0027] FIG2 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure;

[0028] FIG3 is a flow chart of a method for displaying a projection image provided by an embodiment of the present disclosure;

[0029] FIG4 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure;

[0030] FIG5 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure;

[0031] FIG6 is a flowchart of another method for displaying a projected image provided by an embodiment of the present disclosure;

[0032] FIG7 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure;

[0033] FIG8 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure;

[0034] FIG9 is a flowchart of another method for displaying a projection image provided by an embodiment of the present disclosure;

[0035] FIG10 is a schematic structural diagram of another laser projection device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0037] FIG1 is a schematic diagram of the structure of a laser projection device provided by an embodiment of the present disclosure. Referring to FIG1 , the projection device includes a housing 01 and a projection imaging system enclosed by the housing 01. As shown in FIG1 , the projection imaging system may include a light source unit 021, an optical engine unit 022, and a lens unit 023.

[0038] The light source unit 021 is provided with a light source, such as a laser light source. The optical engine unit 022 is capable of modulating the light beam emitted by the light source to generate a projection image to be displayed. The projection image to be displayed can be projected onto a projection screen through a projection lens in the lens unit 023 to realize the display of the projection image.

[0039] FIG2 is a schematic structural diagram of another laser projection device provided by an embodiment of the present disclosure. Referring to FIG2 , the laser projection device may include: a mainboard 100, a display panel 200, and a power supply board 600. The power supply board 600 is connected to the mainboard 100 and the display panel 200, respectively, and is used to power various devices or partial modules on the mainboard 100 and the display panel 200, as well as to power other functional modules in the laser projection device, such as a human eye protection module, a fan, and a wireless fidelity (WI-FI) module. A laser driving component for driving the laser light source to emit light may also be provided on the power supply board 600. Alternatively, the laser driving component may also be provided independently of the power supply board 00.

[0040] The mainboard 100 is also connected to the display panel 200. The mainboard 100 is used to receive image data of the projected image sent by the front-end device and decode the image data. As shown in Figure 2, the mainboard 100 may be provided with a system-on-chip (SoC) 11. The SoC 11 can decode image data in different data formats into a normalized format and transmit the normalized image data to the display panel 200. For example, the mainboard 100 can transmit the normalized image data to the display panel 200 via a connector.

[0041] The mainboard 100 may also be called a television (TV) board.

[0042] The display panel 200 may be provided with an algorithm processing module field programmable gate array (FPGA) (not shown in FIG2 ). The algorithm processing module FPGA can process the input image data of the projection screen, for example, performing motion estimation and motion compensation (MEMC) frequency multiplication processing or image correction processing.

[0043] As shown in FIG2 , the display panel 200 may also be provided with a display control chip 21. The display control chip 21 may be connected to the algorithm processing module FPGA and used to receive the processed image data of the projection picture and use the processed projection picture as the projection picture to be displayed.

[0044] In one embodiment, the display panel 200 may not include the algorithm processing module FPGA. The display control chip 21 may be directly connected to the mainboard 100 , and the display control chip 21 may directly receive the projection image transmitted by the mainboard 100 .

[0045] In the embodiment of the present disclosure, the display control chip 21 may be a light valve control chip (not output in FIG2 ). The light valve control chip may be a digital light processing (DLP) chip. The DLP chip is capable of outputting 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 referred to as a primary color light enable signal. The primary color light enable signal may be represented by 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 (i.e., whether it is lit) to achieve control of the light emission timing of multiple light sources of different colors. The brightness adjustment signal may be a pulse width modulation (PWM) signal, which is used to control the light emission brightness of the light source.

[0046] In one embodiment, the display panel 200 may also be provided with a light modulator (not shown in FIG. 2 ). The light modulator may be a digital micromirror device (DMD), which may also be referred to as a light valve. The display control chip 21 may generate a modulation drive signal for driving the light modulator based on the projection image to be projected and displayed, and also generate a drive signal for driving the light source to emit light. Based on this, the light modulator can modulate the light beam emitted by the light source under the control of the modulation drive signal to obtain an image beam of the projected image. The image beam can be projected onto a projection screen via a projection lens to display the projected image.

[0047] FIG3 is a flow chart of a method for displaying a projected image provided by an embodiment of the present disclosure. This method can be applied to a laser projection device, such as the laser projection device shown in FIG1 or FIG2. As shown in FIG2, the laser projection device may include a system-on-chip 11 and a display control chip 21. As shown in FIG4 and FIG5, 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. As shown in FIG3, the method includes:

[0048] Step 101: A mode determination module receives a projection image and a frame rate of the projection image sent by a video signal source.

[0049] In the disclosed embodiment, the mode determination module 112 in the SoC 21 can receive a projected image and its frame rate from a video signal source. The frame rate refers to the frequency at which the projected image appears continuously 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 can be a signal source that establishes a communication connection with the SoC 21.

[0050] Step 102: If the mode determination module determines that the target frame rate mode of the laser projection device is in the on state, the projection image is sent to the target frame rate determination module.

[0051] As shown in FIG5 , the mode determination module 112 is connected to the target frame rate determination module 116. After receiving the projection image and the frame rate of the projection image from the video signal source, the mode determination module 112 can detect whether the target frame rate mode of the laser projection device is enabled. If the target frame rate mode of the laser projection device is enabled, the projection image can be sent to the target frame rate determination module 116.

[0052] The mode determination module 112 may pre-store a correspondence between a target frame rate mode and a target frame rate. The target frame rate mode may be a pre-set frame rate mode in the laser projection device, and the target frame rate mode is used to indicate how the system-on-chip determines the frame rate for displaying the projected image. Depending on the target frame rate mode, the mode determination module 112 may determine the frame rate for displaying the projected image in different ways.

[0053] Step 103: The target frame rate determination module sends the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip.

[0054] The target frame rate determination module 116 may pre-store a correspondence between the target frame rate mode and the target frame rate. Based on this correspondence, the target frame rate determination module 116 may determine the target frame rate corresponding to the target frame rate mode. The target frame rate determination module 116 may then send the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip 21.

[0055] The target frame rate mode may be a frame rate mode pre-set in the laser projection device, and the target frame rate mode is used to indicate how the target frame rate determination module 116 in the system-on-chip 11 determines the frame rate for displaying the projected image. Depending on the target frame rate mode, the target frame rate determination module 116 determines the frame rate for displaying the projected image in different ways.

[0056] Step 104: The display control chip displays the projection image on the projection screen according to the target frame rate.

[0057] After receiving the projection image and the target frame rate sent by the target frame rate determination module 116 in the system-on-chip 11 , the display control chip 21 may display the projection image on the projection screen according to the target frame rate.

[0058] Step 105 : If the mode determination module determines 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.

[0059] As shown in FIG4 , the mode determination module 112 is further 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 off, it can send the received projection image and the frame rate of the projection image to the display frame rate determination module 113.

[0060] Step 106 : 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.

[0061] In the embodiment of the present disclosure, 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 and resolution of the projected image, and send the projected image and the display frame rate to the display control chip 21.

[0062] Step 107: The display control chip displays the projection image on the projection screen according to the display frame rate.

[0063] After receiving the projection image and the display frame rate sent by the display frame rate determination module 113 in the system-on-chip 11 , the display control chip 21 may display the projection image on the projection screen according to the display frame rate.

[0064] In the disclosed embodiment, when the target frame rate mode of the laser projection device is enabled, the system-on-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 displays the projected image at the target frame rate. Therefore, both the game screen and the movie screen are displayed at the target frame rate, thereby ensuring low latency for the projected image with a lower frame rate.

[0065] When the target frame rate mode of the laser projection device is off, the system-level chip 11 can send the display frame rate determined based on the resolution and frame rate of the projected image to the display control chip 21, so that the display control chip 21 displays the projected image at this display frame rate. 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. The viewing screen can be displayed at a lower frame rate.

[0066] To sum up, the embodiments of the present disclosure provide a method for displaying a projected image, in which 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 chip displays the projected image at different frame rates, thereby improving the flexibility of the projection image display.

[0067] FIG6 is a flowchart of another method for displaying a projected image provided by an embodiment of the present disclosure. This method can be applied to the laser projection device shown in FIG1, FIG2, FIG4, or FIG5. As shown in FIG2, the laser projection device may include a system-on-chip 11 and a display control chip 21. As shown in FIG4 and FIG5, 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. As shown in FIG7, the projection device may also include a galvanometer 22 connected to the display control chip 21. Referring to FIG6, the method may include:

[0068] Step 201: The mode determination module receives a projection image and a frame rate of the projection image sent by a video signal source.

[0069] In the embodiment of the present disclosure, the mode determination module 112 in the SoC 11 may receive a projection image and a frame rate of the projection image sent by a video signal source that has established a communication connection with the SoC 11. The frame rate refers to the frequency at which the projection image appears continuously on the projection screen in units of frames, or can be understood as the number of projection images displayed on the projection screen per second.

[0070] The video signal source may be an external signal source, a digital television signal source, or a network video signal source, and the external signal source may be a gaming device, a computer, a mobile phone, or other device.

[0071] Referring to Figure 2, the laser projection device may include a motherboard 100. Referring to Figures 4 and 5, the system-level chip 11 may be located on the motherboard 100. The motherboard 100 is provided with multiple interfaces such as a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, a digital TV interface, and a network video application interface. The external signal source can be connected to the HDMI or USB interface.

[0072] The network video signal source may be a backend server of an application installed in the laser projection device. For example, the application may be an application such as fitness, video calling, and search. The digital television signal source may include television channels.

[0073] It is understood that the frame rates of the projected images provided by the different video signal sources may be different. In one embodiment, the HDMI may be connected to a gaming device. The frame rate of the projected images provided by the gaming device is generally higher than the frame rate of the projected images provided by other video signal sources. The other video signal sources include external signal sources, digital television signal sources, and network video signal sources other than the gaming device.

[0074] For example, the frame rate of the projection image sent by the gaming device may be 240 Hz. The frame rate of the projection image provided by the network video signal source may be 50 Hz.

[0075] 5 , a signal source switch 12 may be further provided on the mainboard 100 . One end of the signal source switch 12 is connected to any one of the multiple interfaces, and the other end is connected to the system-on-chip 11 .

[0076] After detecting that a communication connection has been established with a target video signal source, the SoC 11 can connect the signal source switch 12 to a target interface among the multiple interfaces, thereby allowing the target video signal source to transmit the projected image and the frame rate of the projected image to the SoC 11 via the target interface. The target interface corresponds to the target video signal source. As a result, the mode determination module 112 in the SoC 11 can receive the projected image and the frame rate of the projected image.

[0077] Step 202: The mode determination module detects whether the target frame rate mode of the laser projection device is in an on state.

[0078] After receiving the projected image and the frame rate of the projected image from the video signal source, the mode determination module 112 can detect whether the target frame rate mode of the laser projection device is enabled. If the target frame rate mode of the laser projection device is enabled, the mode determination module 112 can execute step 203. If the target frame rate mode of the laser projection device is disabled, the mode determination module 112 can execute step 210.

[0079] In an embodiment of the present disclosure, the system-level chip 21 can display a frame rate setting interface in response to a frame rate setting instruction. The frame rate mode setting interface can display a switch button for a target frame rate mode. If the system-level chip receives an on instruction for the switch button for the target frame rate mode, the target frame rate mode of the laser projection device can be recorded as being in an on state. If the system-level chip 21 receives an off instruction for the switch button for the target frame rate mode, the target frame rate mode of the laser projection device can be recorded as being in an off state.

[0080] Then, after receiving the projection image and the frame rate of the projection image sent by the video signal source, the mode determination module 112 in the SoC 21 can determine whether the target frame rate mode is in the on state according to the recorded state of the target frame rate mode.

[0081] Step 203: The mode determination module sends the received projection image to the target frame rate determination module.

[0082] As shown in Figure 5, 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, the received projection image can be sent to the target frame rate determination module 116.

[0083] Step 204: The target frame rate determination module sends the projected image and the target frame rate corresponding to the target frame rate mode to the resolution adjustment module.

[0084] As shown in FIG5 , 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 a correspondence between a target frame rate mode and a target frame rate. Based on this correspondence, the target frame rate determination module 116 may determine a target frame rate corresponding to the target frame rate mode. For example, the target frame rate may be 120 Hz. The target frame rate determination module 116 may then send the projected image and the target frame rate corresponding to the target frame rate mode to the resolution adjustment module 114 .

[0085] The target frame rate mode may be a pre-set frame rate mode in the laser projection device, and the target frame rate mode is used to indicate how the target frame rate determination module 116 in the system-on-chip 21 determines the frame rate for displaying the projected image. Depending on the target frame rate mode, the target frame rate determination module 116 determines the frame rate for displaying the projected image in different ways.

[0086] Step 205: The resolution adjustment module detects whether the resolution of the projected image is different from the resolution of the projection screen.

[0087] After receiving the projected image, the resolution adjustment module 114 may detect whether the resolution of the projected image is different from the resolution of the projection screen. If the resolution of the projected image is different from the resolution of the projection screen, the resolution adjustment module 114 may execute step 206. If the resolution of the projected image is the same as the resolution of the projection screen, the resolution adjustment module 114 may execute step 207.

[0088] The resolution adjustment module 114 in the system-on-chip 11 may pre-store the resolution of the projection screen. For example, the resolution of the projection screen may be 1080×1920, where 1080 is the number of pixel rows and 1920 is the number of pixel columns.

[0089] For example, assuming that the resolution of the projection image is 2160×3840 and the resolution of the projection screen is 1080×1920, since the resolution of the projection image is different from the resolution of the projection screen, the system-on-chip may execute step 206 .

[0090] Step 206: The resolution adjustment module adjusts the resolution of the projected image to the resolution of the projection screen.

[0091] In the embodiment of the present disclosure, if the resolution adjustment module 114 in the SoC 11 determines that the resolution of the projected image is different from the resolution of the projection screen, the resolution adjustment module 114 may adjust the resolution of the projected image to the resolution of the projection screen.

[0092] In one embodiment, if the resolution adjustment module 114 determines that the resolution of the projected image is greater than 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 the resolution of the projected image is determined to be less than the resolution of the projection screen, 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 resolution of the projection screen.

[0093] For example, assuming that 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 greater than the resolution of the projection screen, the system-level chip can reduce the resolution of the projected image so that the resolution of the projected image is 1080×1920.

[0094] Step 207: The resolution adjustment module sends the projected image and the target frame rate to the light valve control chip.

[0095] As shown in FIG6 , 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 projected image is the same as the resolution of the projection screen, it may directly send the projected 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 projected image is different from the resolution of the projection screen, it may adjust the resolution of the projected image to match the resolution of the projection screen and then send the adjusted projected image and the target frame rate to the light valve control chip 212.

[0096] In one embodiment, referring to FIG. 4 and FIG. 5 , the system-on-chip 11 may further include an image processing module 111 and a format conversion module 115 .

[0097] 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) processing on the received projected image, and send the processed projected image to the mode determination module 112.

[0098] 4 , the display frame rate determination module 113 is connected to the resolution adjustment module 114 and the format conversion module 115. The display frame rate determination module 113 can determine the display frame rate based on the received resolution and frame rate of the projected image. If the determined display frame rate is the reference frame rate, 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 projected image, the projected image and the display frame rate are sent to the format conversion module 115.

[0099] For example, referring to Figure 4, if the resolution of the received projection image is not 1080×1920 and the frame rate is not 240 Hz, the display frame rate determination module 113 determines the display frame rate as the reference frame rate and sends the projection image and the display frame rate to the resolution adjustment module 114.

[0100] If the resolution of the received projection image is 1080×1920 and the frame rate is 240 Hz, the display frame rate determination module 113 determines the display frame rate to be the frame rate of the projection image, and sends the projection image and the display frame rate to the format conversion module 115. The format conversion module 115 is configured to convert the received projection image and frame rate into a format recognizable 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.

[0101] 8 , the projection image sent by the format conversion module 115 to the display control chip 21 may have a resolution of 2160×3840 and a frame rate of 60 Hz, or a resolution of 1080×1920 and a frame rate of 240 Hz, or a resolution of 1080×1920 and a frame rate of 120 Hz.

[0102] Step 208: The light valve control chip divides the adjusted projection image into multiple sub-image frames and sends a galvanometer drive signal to the galvanometer driver.

[0103] As shown in FIG8 , the laser projection device further includes a galvanometer 22 and a galvanometer driver 24, and the light valve control chip 212 is also connected to the galvanometer driver 24. After receiving the adjusted projection image, the light valve control chip 212 can divide the projection image into multiple sub-frame images.

[0104] 8 , 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 further include an image quality processing module 211 and a main control circuit 213. The laser projection device may further include an input interface 23 and a galvanometer driver 24 located on the display panel 200.

[0105] 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 .

[0106] 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 clarity of the projection image received by the signal input interface 23 and send the frame rate and the processed projection image to the light valve control chip 212 .

[0107] 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 multiple frames of sub-images to different positions of the projection screen.

[0108] The resolution of the projected image is the same as the resolution of the projection screen. As shown in FIG8 , the light valve control chip 212 is also connected to the main control circuit 213, the light source driver assembly 300, and the light valve 500. The light valve control chip 212 is also configured to, if the resolution of the received projected image is the reference resolution and the frame rate of the projected image is the reference frame rate, divide the projected image into multiple sub-images, generate a light valve control signal based on the pixel values ​​of each sub-image, and send it to the light valve 500, as well as send a galvanometer drive signal to the galvanometer driver 24.

[0109] The light valve control chip 212 is further configured to send a light valve control signal generated according to pixel values ​​of the projected image to the light valve 500 if the resolution of the received projected image is not the reference resolution, and not send a galvanometer drive signal to the galvanometer driver 24 .

[0110] The light valve control chip 212 is also used to send image display instructions to the main control circuit 213 and a duty cycle signal to the light source driver assembly 300. The duty cycle signal represents the weighted contribution of each of the three primary colors to a complete color cycle. If the resolution of the received projected image is the reference resolution and the frame rate of the projected 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-level chip.

[0111] The main control circuit 213 is also connected to the light source driver assembly 300 and is configured to send PWM signals for the three primary colors to the light source driver assembly 300 in response to image display commands. The PWM signals represent the brightness values ​​of each primary color. The light source driver assembly 300 is configured to drive the light source 400 to periodically emit a light beam in response to the duty cycle signal and the pulse width modulation signal. Under the control of the light valve control signal, the light valve 500 modulates the light beam emitted by the light source 400 onto its surface into an image beam. This image beam is then projected onto the projection screen through the projection lens to display the image.

[0112] 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 .

[0113] In step 202 , if the mode determination module 112 determines that the target frame rate mode of the laser projection device is in the off state, the received projection image and the frame rate of the projection image may be sent to the display frame rate determination module 113 .

[0114] 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.

[0115] The process of the display frame rate determining module 113 determining the display frame rate of the projection image according to the frame rate of the projection image and the resolution of the projection image may include the following steps:

[0116] Step 2111: Detect whether the frame rate of the projected image is greater than or equal to a frame rate threshold, and whether the resolution of the projected image is the same as the resolution of the projection screen.

[0117] If 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 can pre-store a frame rate threshold. For example, the frame rate threshold can be 240 Hz.

[0118] 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, then the current mode of the laser projection device can be determined to be gaming mode, and step 2112 can be executed. 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, then the current mode of the laser projection device can be determined to be movie viewing mode, and step 2113 can be executed.

[0119] It is understood that 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, it can be determined that the projected image is a game screen. Since the frame rate of the projected image is relatively high, displaying the projected image at the frame rate of the projected image can ensure low latency. And because the resolution of the projected image is the same as the resolution of the projection screen, the projected image can be displayed on the projection screen without adjusting the resolution of the projected image, thereby further ensuring low latency when displaying the projected image in game mode and ensuring a good user experience.

[0120] Step 2112: Determine the frame rate of the projected image as the display frame rate.

[0121] 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, the frame rate of the projected image may be determined as the display frame rate. For example, the frame rate of the projected image may be 240 Hz.

[0122] In the embodiment of the present disclosure, after determining that the current mode of the laser projection device is the game mode, the display frame rate determination module 113 can directly determine the frame rate of the projected image as the display frame rate, thereby ensuring low latency when displaying the projected image.

[0123] For example, assume that the frame rate of the projected image is 240 Hz, the frame rate threshold is 240 Hz, the resolution of the projected image is 1080 × 1920, and the resolution of the projection screen is 1080 × 1920. Since the frame rate of the projected image is equal to the frame rate threshold, and the resolution of the projected image is the same as the resolution of the projection screen, the SoC can determine that the display frame rate is 240 Hz.

[0124] Step 2113: Determine the reference frame rate as the display frame rate.

[0125] 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 that the resolution of the projected image is different from the resolution of the projection screen, it may determine a reference frame rate as the display frame rate. The reference frame rate is less than the frame rate threshold. For example, the reference frame rate may be 60 Hz.

[0126] For example, assume that the frame rate of the projected image is 50 Hz, the frame rate threshold is 240 Hz, the reference frame rate is 60 Hz, the resolution of the projected image is 1080 × 1920, and the resolution of the projection screen is 1080 × 1920. Since the frame rate of the projected image, 50 Hz, is less than the frame rate threshold of 240 Hz, the SoC can determine that the display frame rate is 60 Hz.

[0127] Step 212: The display frame rate determination module sends the projected image and the display frame rate to the resolution adjustment module.

[0128] As shown in FIG4 , the display frame rate determination module 113 is connected to the resolution adjustment module 114 and the format conversion module 115. In step 211, if the display frame rate determination module 113 determines that the display frame rate is the reference frame rate, 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 projected image, the projected image and the display frame rate are sent to the format conversion module 115.

[0129] For example, referring to Figure 4, if the resolution of the received projection image is not 1080×1920 and the frame rate is not 240 Hz, the display frame rate determination module 113 determines the display frame rate as the reference frame rate and sends the projection image and the display frame rate to the resolution adjustment module 114.

[0130] If the resolution of the received projection image is 1080×1920 and the frame rate is 240 Hz, the display frame rate determination module 113 determines the display frame rate to be the frame rate of the projection image, and sends the projection image and the display frame rate to the format conversion module 115 .

[0131] Step 213 : If the resolution adjustment module determines that the resolution of the projected image is different from the reference resolution, the resolution adjustment module adjusts the resolution of the projected image to the reference resolution, and sends the adjusted projected image and display frame rate to the light valve control chip.

[0132] After receiving the projected image and display frame rate, the resolution adjustment module 114 can first detect whether the resolution of the projected image differs from the reference resolution. If the resolution adjustment module 114 determines that the resolution of the projected image differs 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 chip 212 in the display control chip 21. 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.

[0133] The reference resolution is greater than the resolution of the projection screen. The reference resolution can be pre-stored in the system-level chip. For example, the reference resolution can be 2160×3840.

[0134] In one embodiment, if the resolution adjustment module 114 determines that the resolution of the projected image is less than the reference resolution, the resolution of the projected image may be increased 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, the resolution of the projected image may be decreased so that the resolution of the projected image is equal to the reference resolution.

[0135] Step 214 : The light valve control chip divides the adjusted projection image into multiple sub-image frames and sends a galvanometer drive signal to the galvanometer driver.

[0136] The implementation process of this step can refer to the description of step 208 above, and this application will not go into details.

[0137] Step 215 : The galvanometer driver controls the galvanometer to deflect to different positions under the control of the galvanometer driving signal, so that the galvanometer projects multiple frames of sub-images to different positions of the projection screen.

[0138] In the embodiment of the present disclosure, if the display frame rate sent by the system-level chip 11 received by the display control chip 21 is the frame rate of the projection image, the display control chip 21 can display the received projection image on the projection screen according to the frame rate of the projection image. If the display frame rate sent by the system-level chip received by the display control chip 21 is the reference frame rate, the display control chip 21 can display the received projection image on the projection screen according to the reference frame rate.

[0139] In one embodiment, the galvanometer driver 24 can control the galvanometer 22 to deflect to different positions according to a deflection frequency. The deflection frequency can be the product of the number of sub-images in the multi-frame and the reference frame rate. For example, if the reference frequency is 60 Hz and the number of sub-images in the multi-frame is 4, the deflection frequency is 60 Hz × 4, or 240 Hz.

[0140] In the embodiment of the present disclosure, when the target frame rate mode of the laser projection device is turned on, the system-level 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 resolution of the projection screen. If it is determined that the resolution of the projected image is less than the reference resolution, the resolution of the projected image is increased to the reference resolution. The display control chip 21 divides the projected image into multiple sub-frames and controls the galvanometer to display the multiple sub-frames at different positions on the projection screen, thereby displaying the high-resolution projection image on the low-resolution projection screen, thereby improving the image display effect.

[0141] That is, in movie viewing mode, even if the resolution of the projected image is relatively low, the resolution of the projected image can be increased to ensure a higher resolution of the displayed projected image, thus providing users with a better viewing experience. In gaming mode, the projected image is displayed within the projected image at the same frame rate as the projected image, ensuring low latency when displaying the projected image.

[0142] When the target frame rate mode of the laser projection device is turned on, 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 less than the resolution of the projection screen, since the resolution of the projected image can be increased to the resolution of the projection screen and the projected image is displayed according to the target frame rate, the low latency of the projected image is ensured while ensuring the image display effect. When the projected image is a movie viewing screen, if the resolution of the projected image is less than the projection screen, by adjusting the resolution of the projected image to the resolution of the projection screen and displaying the projected image according to the target frame rate, the image display effect is ensured while also ensuring low latency of the image display.

[0143] As shown in FIG10 , the laser projection device may further include a power supply circuit 25, a light valve power supply assembly 26, a socket 27, a program storage assembly 28, a memory 29, a heat sink assembly 30, and an external component 700. The power supply board 600 is respectively connected to the system-on-chip 11, the light source driver assembly 300, the power supply circuit 25, and the light valve power supply assembly 26. 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 assembly 26 and the light valve 500.

[0144] The power board 600 can be used to provide power signals to the system-on-chip 11, the light source driver assembly 300, the power supply circuit 25, and the light valve power supply assembly 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 supply power to the light valve 500 via the socket 27.

[0145] The program storage component 28 is connected to the light valve control chip 212 . After being powered on, the light valve control chip 212 can read the program from the external program storage component 28 for initialization.

[0146] The memory 29 may be an electrically erasable programmable read-only memory (EEPROM). The light valve control chip 212 may send the correction data to the memory 29 so that the memory 29 stores the correction data. The correction data may be used to correct the projection position or shape of the projected image. The light valve control chip 212 may correct the projection position or shape of the projected image based on the correction data.

[0147] 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 for 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.

[0148] The external component 700 is connected to the mainboard 100 . The external component 700 may be a camera, an infrared sensor, an acceleration sensor, a gyroscope, an optical fiber, etc. connected to the mainboard 100 .

[0149] To sum up, the embodiments of the present disclosure provide a method for displaying a projected image, in which 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 chip displays the projected image at different frame rates, thereby improving the flexibility of the projection image display.

[0150] The present disclosure provides a laser projection device that can execute the method for displaying a projected image provided in the above-described method embodiment (e.g., the method shown in FIG3 or FIG6 ). Referring to FIG2 , the laser projection device includes a system-on-chip (SoC) 11 and a display control chip 21. Referring to FIG4 and FIG5 , the SoC 21 includes a mode determination module 112, a display frame rate determination module 113, and a target frame rate determination module 116.

[0151] 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 and the frame rate of the projection image sent by the video signal source, and is used to send the received projection image and the frame rate of the projection image to the display frame rate determination module 113 if it is determined that the target frame rate mode of the laser projection device is in the off state, and to send the received projection image to the target frame rate determination module 116 if it is determined that the target frame rate mode of the laser projection device is in the on state.

[0152] The display frame rate determination module 113 is connected to the display control chip 21 , and is configured to determine the display frame rate of the projection image according to the frame rate and resolution of the projection image, and send the projection image and the display frame rate to the display control chip 21 .

[0153] The display control chip 21 is used to display the projection image on the projection screen according to the display frame rate.

[0154] The target frame rate determination module 116 is connected to the display control chip 21 and is configured to send the projection image and the target frame rate corresponding to the target frame rate mode to the display control chip 21 .

[0155] The display control chip 21 is further configured to display the projection image on the projection screen according to a target frame rate.

[0156] In summary, the embodiments of the present disclosure provide a laser projection device, in which 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 chip displays the projected image at different frame rates, thereby improving the flexibility of the projection image display.

[0157] In one embodiment, 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 a frame rate threshold, and the resolution of the projected image is the same as the resolution of the projection screen, determine the frame rate of the projected image 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, determine the reference frame rate as the display frame rate. The reference frame rate is less than the frame rate threshold.

[0158] In one embodiment, as shown in FIG. 4 , FIG. 5 and FIG. 8 , the laser projection device further includes a galvanometer 22 and a galvanometer driver 24 , the system-level chip 11 further includes a resolution adjustment module 114 , and the display control chip 21 includes a light valve control chip 212 .

[0159] The display frame rate determination module 113 is also connected to the resolution adjustment module 114, and is used to determine 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, send the projection image and the display frame rate to the resolution adjustment module 114.

[0160] 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 send the adjusted projected image and display frame rate to the light valve control chip 212. The reference resolution is greater than the resolution of the projection screen.

[0161] As shown in FIG8 , the light valve control chip 212 is also connected to the galvanometer driver 24. The light valve control chip 212 is configured to divide the adjusted projection image into multiple sub-image frames and send a galvanometer drive signal to the galvanometer driver 24. The galvanometer driver 24 is also connected to the galvanometer 22. Under the control of the galvanometer drive signal, the galvanometer driver 24 is configured to control the galvanometer 22 to deflect to different positions, so that the galvanometer project the multiple sub-image frames onto different positions on the projection screen.

[0162] In one embodiment, the galvanometer driver 24 is configured to control the galvanometer 22 to deflect to different positions according to a deflection frequency, wherein the deflection frequency is the product of the number of sub-images in a plurality of frames and a reference frame rate.

[0163] In one embodiment, the target frame rate is less than the frame rate threshold and greater than the reference frame rate.

[0164] In one embodiment, as shown in FIG. 5 , the target frame rate determination module 116 is further connected to the resolution adjustment module 114 for determining the target frame rate based on the target frame rate mode and sending the determined target frame rate and the projected image to the resolution adjustment module 114 .

[0165] The resolution adjustment module 114 is further configured to adjust the resolution of the projected image to 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, and send the adjusted projected image and target frame rate to the light valve control chip 212 .

[0166] The light valve control chip 212 is used to divide the adjusted projection image into multiple sub-image frames and send a galvanometer drive signal to the galvanometer driver 24 .

[0167] The galvanometer driver 24 is used to control the galvanometer 22 to deflect to different positions according to the target frame rate under the control of the galvanometer driving signal, so that the galvanometer projects multiple frame sub-images to different positions of the projection screen.

[0168] In summary, the embodiments of the present disclosure provide a laser projection device, in which 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 chip displays the projected image at different frame rates, thereby improving the flexibility of the projection image display.

[0169] An embodiment of the present disclosure provides a laser projection device, including: a memory, a processor, and a computer program stored in the memory, and when the processor executes the computer program, the method for displaying a projection image as described above is implemented.

[0170] An embodiment of the present disclosure provides a computer-readable storage medium, in which instructions are stored. The instructions are loaded and executed by a processor to implement the method for displaying a projection image as described above.

[0171] An embodiment of the present disclosure provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the method for displaying a projection image according to the above aspect.

[0172] In the embodiments of the present disclosure, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the embodiments of the present disclosure, the term "plurality" means two or more. In the embodiments of the present disclosure, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0173] The above description is merely an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A laser projection device, characterized in that: 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 connected to the display frame rate determination module and the target frame rate determination module respectively, and is used to receive a projection image and a frame rate of the projection image sent by a video signal source, and to send the received projection image and the frame rate of the projection image to the display frame rate determination module if it is determined that the target frame rate mode of the laser projection device is in an off state, and to send the received projection image to the target frame rate determination module if it is determined that the target frame rate mode of the laser projection device is in an on state; 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 send the projection image and the display frame rate 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 projected image and the target frame rate corresponding to the target frame rate mode to the display control chip; The display control chip is further configured to display the projection image on a projection screen according to the target frame rate.

2. The laser projection device according to claim 1, characterized in that: The display frame rate determination module is used for: 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, determining the frame rate of the projected image 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, determining the reference frame rate as the display frame rate; The reference frame rate is less than the frame rate threshold.

3. The laser projection device according to claim 2, characterized in that: The laser projection device further includes a galvanometer and a galvanometer driver; The system-level chip further includes: a resolution adjustment module; the display control chip includes: a light valve control chip; The display frame rate determination module is further connected to the resolution adjustment module, and is configured to determine the display frame rate according to the received resolution of the projected image and the frame rate of the projected image, and if the determined display frame rate is a reference frame rate, send the projected image and the display frame rate to the resolution adjustment module; The resolution adjustment module is further connected to the light valve control chip and is configured 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 a reference resolution, and send the adjusted projected image and the display frame rate to the light valve control chip, wherein the reference resolution is greater than the resolution of the projection screen; The light valve control chip is also connected to the galvanometer driver, and is used to divide the adjusted projection image into multiple sub-frames and send a galvanometer drive signal to the galvanometer driver; The galvanometer driver is also connected to the galvanometer, and is used to control the galvanometer to deflect to different positions under the control of the galvanometer drive signal, so that the galvanometer projects the multiple frame sub-images to different positions of the projection screen.

4. The laser projection device according to claim 3, characterized in that: The galvanometer driver is used to control the galvanometer to deflect to different positions according to the deflection frequency; The deflection frequency is the product of the number of the multi-frame sub-images and the reference frame rate.

5. The laser projection device according to claim 2, characterized in that: The target frame rate is less than the frame rate threshold and greater than the reference frame rate.

6. The laser projection device according to claim 3 or 4, characterized in that: The target frame rate determination module is further connected to the resolution adjustment module, and is configured to determine the target frame rate based on the target frame rate mode, and send the determined target frame rate and the projected image to the resolution adjustment module; The resolution adjustment module is further configured to adjust the resolution of the projected image to 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, and send the adjusted projected image and the target frame rate to the light valve control chip; The light valve control chip is used to divide the adjusted projection image into multiple frame sub-images and send a galvanometer drive signal to the galvanometer driver; The galvanometer driver is used to control the galvanometer to deflect to different positions according to the target frame rate under the control of the galvanometer drive signal, so that the galvanometer projects the multiple frame sub-images to different positions of the projection screen.

7. A method for displaying a projected image, characterized in that: Applied to a laser projection device, 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 method includes: The mode determination module receives a projection image sent by a video signal source and a frame rate of the projection image; If the mode determination module determines that the target frame rate mode of the laser projection device is in the on state, the received projection image is sent to the target frame rate determination module; The target frame rate determination module sends the projected 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; If the mode determination module determines that the target frame rate mode of the laser projection device is in an off state, the mode determination module sends the received projection image and the frame rate of the projection image 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.

8. The method according to claim 7, characterized in that The determining the display frame rate of the projection image according to the frame rate of the projection image and the resolution of the projection image includes: If the display frame rate determination module 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, then the frame rate of the projected image is determined as the display frame rate; If the display frame rate determination module 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, the reference frame rate is determined as the display frame rate. The reference frame rate is less than the frame rate threshold.

9. The method according to claim 8, characterized in that The laser projection device further includes a galvanometer and a galvanometer driver; The system-level chip further includes: a resolution adjustment module; the display control chip includes: a light valve control chip; after the display frame rate determination module determines the reference frame rate as the display frame rate, the method further includes: The display frame rate determination module sends the projection image and the display frame rate to the resolution adjustment module; If the resolution adjustment module determines that the resolution of the projected image is different from the reference resolution, it adjusts the resolution of the projected image to the reference resolution, and sends the adjusted projected image and the display frame rate to the light valve control chip, wherein the reference resolution is greater than the resolution of the projection screen; The display control chip displays the projection image on the projection screen according to the display frame rate, including: The light valve control chip divides the adjusted projection image into multiple frame sub-images and sends them to the galvanometer driver. Send galvanometer drive signal; The galvanometer driver controls the galvanometer to deflect to different positions under the control of the galvanometer driving signal, so that the galvanometer projects the multiple frame sub-images to different positions of the projection screen.

10. The method according to claim 9, characterized in that The galvanometer driver controls the galvanometer to deflect to different positions, including: The galvanometer driver controls the galvanometer to deflect to different positions according to the deflection frequency; The deflection frequency is the product of the number of the multi-frame sub-images and the reference frame rate.

11. The method according to claim 8, characterized in that The target frame rate is less than the frame rate threshold and greater than the reference frame rate.

12. The method according to claim 9 or 10, characterized in that The method further includes: the target frame rate determination module sending the projected image and the target frame rate corresponding to the target frame rate mode to the display control chip, including: The target frame rate determination module sends the determined target frame rate and the projected image to the resolution adjustment module; If the resolution adjustment module determines that the resolution of the projected image is different from the resolution of the projection screen, the resolution adjustment module adjusts the resolution of the projected image to the resolution of the projection screen; The resolution adjustment module sends the adjusted projection image and the target frame rate to the light valve control chip; The display control chip displays the projection image on the projection screen according to the target frame rate, including: The light valve control chip divides the adjusted projection image into multiple frame sub-images and sends a galvanometer drive signal to the galvanometer driver; 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 multiple frame sub-images to different positions of the projection screen.

13. A computer-readable storage medium, characterized in that The computer-readable storage medium stores instructions, which are loaded and executed by a processor to implement the method for displaying a projection image according to any one of claims 7 to 12.

Images