Projection display method, projection equipment and storage medium

Abstract

The invention discloses projection equipment. The projection equipment comprises a light valve, a first controller, a second controller, a camera device and a detection device. The detection device is configured to detect the current brightness of ambient light. The first controller is configured to control the camera device to be started after receiving a first instruction, and control the detection device to detect the current brightness of ambient light; determining a target image shooting mode according to the corresponding relation between the brightness and the image shooting mode; sending first notification information to the second controller according to the target shooting image mode; the second controller is further configured to call a first feature parameter set corresponding to the target image shooting mode according to the first notification information, process image data collected by the camera device and drive the light valve to display an image.

Description

Projection display method, projection device and storage medium

[0001] This application claims priority to the Chinese patent application with application number 202211031744.0 filed on August 26, 2022; and priority to the Chinese patent application with application number 202211030207.4 filed on August 26, 2022, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of projection display technology, and in particular to a projection display method, a projection device, and a storage medium. Background Art

[0003] With the continuous development of projection display technology, projection equipment is becoming more and more popular among consumers. Due to the characteristics of laser, such as good monochromaticity and high brightness, projection equipment usually uses laser as a light source to display projected images.

[0004] Summary of the Invention

[0005] In one aspect, a projection device is provided. The projection device includes a light valve, a first controller, a second controller, an imaging device, and a detection device. The second controller is electrically connected to the first controller and the light valve, and is configured to drive the light valve to display an image. The imaging device is electrically connected to the first controller. The detection device is electrically connected to the first controller, and is configured to detect the current brightness of ambient light. The first controller is configured to: after receiving a first instruction, control the imaging device to turn on and control the detection device to detect the current brightness of ambient light; the first instruction instructs the first controller to control the imaging device to turn on; determine a target imaging mode based on a correspondence between brightness and imaging modes; the target imaging mode is the imaging mode corresponding to the current brightness, and the imaging mode is an image mode that displays image data captured by the imaging device, and the projection device has multiple imaging modes, each of which corresponds to a color gamut; send a first notification message to the second controller based on the target imaging mode; the first notification message indicates the determined target imaging mode; the second controller is further configured to: based on the first notification message, call a first feature parameter set corresponding to the target imaging mode, process the image data captured by the imaging device, and drive the light valve to display an image; the second controller pre-stores multiple first feature parameter sets, one of the multiple first feature parameter sets corresponds to one of the multiple imaging modes, and the first feature parameter set includes multiple color feature parameters, and the color feature parameters are within the color gamut of the corresponding image mode.

[0006] On the other hand, a projection display method is provided. The projection display method is applied to a projection device. The projection device includes a light valve, a first controller, a second controller, a camera device and a detection device; the second controller is electrically connected to the first controller and the light valve, and is configured to drive the light valve to display an image; the camera device is electrically connected to the first controller; the detection device is electrically connected to the first controller, and is configured to detect the current brightness of the ambient light; the method includes: the first controller receives a first instruction, controls the camera device to turn on, and controls the detection device to detect the current brightness of the ambient light; the first instruction instructs the first controller to control the camera device to turn on; the first controller determines a target camera image mode based on the correspondence between brightness and camera image mode; the target camera image mode is the camera image mode corresponding to the current brightness, and the camera image mode is to display the image captured by the camera device. The image mode of the image data of the set, and the projection device has multiple camera image modes, each of the multiple camera image modes corresponds to a color gamut; the first controller sends a first notification message to the second controller according to the target camera image mode; the first notification message indicates the determined target camera image mode; the second controller calls the first feature parameter set corresponding to the target camera image mode according to the first notification message, processes the image data collected by the camera device, and drives the light valve to display the image; the second controller pre-stores multiple first feature parameter sets, one of the multiple first feature parameter sets corresponds to a camera image mode in the multiple camera image modes, and the first feature parameter set includes multiple color feature parameters, and the color feature parameters are within the color gamut of the corresponding image mode.

[0007] On the other hand, a projection device is provided. The projection device includes a light valve, a first controller, and a second controller. The second controller is electrically connected to the first controller and the light valve, and the second controller is configured to drive the light valve to display an image. The first controller is configured to: receive a target instruction; the target instruction indicates switching the image mode; send target notification information to the second controller according to the received target instruction; the target notification information indicates the currently switched image mode, the projection device has multiple image modes, each of the multiple image modes corresponds to a color gamut; the second controller is further configured to: call the target feature parameter set corresponding to the currently switched image mode according to the target notification information to process the current image data, and drive the light valve to display the image; the second controller pre-stores multiple target feature parameter sets; one of the multiple target feature parameter sets corresponds to one of the multiple image modes; the target feature parameter set includes multiple color feature parameters, and the multiple color feature parameters are within the color gamut of the corresponding image mode.

[0008] In another aspect, a projection display method is provided. The projection display method is applied to a projection device, the projection device including a first controller, a second controller, and a light valve; the first controller is electrically connected to the second controller, the second controller is electrically connected to the light valve, and is configured to drive the light valve for image display; the method includes: the first controller receiving a target instruction; the target instruction instructing switching to a corresponding image mode for image display; the first controller sending target notification information to the second controller based on the received target instruction; the target notification information indicating the currently switched image mode, the projection device having multiple image modes, one of the multiple image modes corresponding to a color gamut; the second controller pre-stores multiple target feature parameter sets; one of the multiple target feature parameter sets corresponds to one of the multiple image modes; the target feature parameter set includes multiple color feature parameters, the color feature parameters being within the corresponding color gamut; the second controller calls the target feature parameter set corresponding to the currently switched image mode based on the target notification information to process current image data, and drives the light valve for image display.

[0009] In another aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer program instructions, which, when executed by a computer, cause the computer to perform one or more steps of the projection display method. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. However, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the products involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signals, etc.

[0011] FIG1 is a structural diagram of a projection system according to some embodiments;

[0012] FIG2 is a structural diagram of a projection device according to some embodiments;

[0013] FIG3 is a light path diagram of a light source, an optical engine, and a lens in a projection device according to some embodiments;

[0014] FIG4 is another optical path diagram of a light source, an optical engine, and a lens in a projection device according to some embodiments;

[0015] FIG5 is a diagram illustrating an arrangement of tiny reflective mirrors in a digital micromirror device according to some embodiments;

[0016] FIG6 is a structural diagram of another projection device according to some embodiments;

[0017] FIG7 is a structural diagram of another projection system according to some embodiments;

[0018] FIG8 is a structural diagram of yet another projection system according to some embodiments;

[0019] FIG9 is a schematic diagram of an imaging device shooting in dark conditions according to some embodiments;

[0020] FIG10 is a chromaticity diagram of various colors according to some embodiments;

[0021] FIG11 is a schematic diagram of a hue, gain, and saturation function interface for multiple colors according to some embodiments;

[0022] FIG12 is a flow chart of a projection display method according to some embodiments;

[0023] FIG13 is a schematic diagram of a remote control for a projection device according to some embodiments;

[0024] FIG14 is a structural diagram of another projection device according to some embodiments;

[0025] FIG15 is a schematic diagram of a social application interface according to some embodiments;

[0026] FIG16 is another flow chart of a projection display method according to some embodiments;

[0027] FIG17 is a flowchart of a method for determining the value of color characteristic parameters corresponding to each color in the first characteristic parameter set according to some embodiments;

[0028] FIG18 is a schematic diagram of image data flow according to some embodiments;

[0029] FIG19 is a schematic diagram of a projection screen according to some embodiments;

[0030] FIG20 is another flow chart of a projection display method according to some embodiments;

[0031] FIG21 is a color coordinate diagram of a projection device according to some embodiments;

[0032] FIG22 is a structural diagram of another projection device according to some embodiments;

[0033] FIG23 is another flowchart of a projection display method according to some embodiments;

[0034] FIG24 is another schematic diagram of a remote control for a projection device according to some embodiments;

[0035] FIG25 is a structural diagram of yet another projection device according to some embodiments;

[0036] FIG26 is another schematic diagram of a menu interface according to some embodiments;

[0037] FIG27 is another flowchart of a projection display method according to some embodiments;

[0038] FIG28 is a flowchart of a method for determining the value of color characteristic parameters corresponding to each color in a target characteristic parameter set according to some embodiments;

[0039] FIG. 29 is a diagram comparing image modes and color gamuts according to some embodiments. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0041] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the particular features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0042] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0043] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0044] “At least one of A, B, or C” includes the following combinations of A, B, and C: A only, B only, C only, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0045] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0046] Some embodiments of the present disclosure provide a projection system 1. Figure 1 is a structural diagram of a projection system according to some embodiments. In some embodiments, as shown in Figure 1 , the projection system 1 includes a projection device 100 and a projection screen 200.

[0047] FIG2 is a structural diagram of a projection device according to some embodiments. As shown in FIG2 , the projection device 100 includes an entire housing 40 (only a portion of the entire housing 40 is shown in FIG2 ), a light source 10 assembled in the entire housing 40, an optical engine 20, and a lens 30. The light source 10 is configured to provide an illumination beam (laser beam). The optical engine 20 is configured to modulate the illumination beam provided by the light source 10 using an image signal to obtain a projection beam. The lens 30 is configured to project the projection beam onto a screen or a wall to form an image. The light source 10, the optical engine 20, and the lens 30 are connected in sequence along the direction of beam propagation, and each is wrapped by a corresponding housing. The housings of the light source 10, the optical engine 20, and the lens 30 support the corresponding optical components and enable each optical component to meet certain sealing or airtight requirements.

[0048] FIG3 is a light path diagram of a light source, an optical engine, and a lens in a projection device according to some embodiments.

[0049] As shown in Figure 3, one end of the optical engine 20 is connected to the light source 10, and the light source 10 and the optical engine 20 are arranged along the exit direction of the illumination beam of the projection device 100 (refer to the M direction in Figure 3). The other end of the optical engine 20 is connected to the lens 30, and the optical engine 20 and the lens 30 are arranged along the exit direction of the projection beam of the projection device 100 (refer to the N direction in Figure 3). The exit direction M of the illumination beam is approximately perpendicular to the exit direction N of the projection beam. This connection structure can not only adapt to the optical path characteristics of the reflective light valve in the optical engine 20, but also help shorten the length of the optical path in one dimension, which is beneficial for the structural layout of the entire device. For example, when the light source 10, the optical engine 20, and the lens 30 are arranged in a single dimension (for example, the M direction), the length of the optical path in this dimension will be very long, which is not conducive to the structural layout of the entire device. The reflective light valve will be described later.

[0050] In some embodiments, light source 10 can sequentially provide three primary colors (or additional colors in addition to the three primary colors). Due to the persistence of vision phenomenon, the human eye perceives white light as a mixture of the three primary colors. Alternatively, light source 10 can simultaneously output the three primary colors, continuously emitting white light. Alternatively, projection device 100 can use a monochromatic light source in conjunction with a fluorescent wheel for time-sharing display.

[0051] In some embodiments, the light source 10 includes a light emitting diode (LED), an electroluminescence (EL) device, a laser, etc. Lasers are widely used as the light source of the projection device 100 because the laser beams emitted by lasers have good monochromaticity, high color purity, high brightness, and good directionality.

[0052] A projection device 100 using a laser as its light source 10 can be referred to as a laser projection device. When a laser projection device uses a red laser, a green laser, and a blue laser as its light source, the red laser emits a red laser beam, the green laser emits a green laser beam, and the blue laser emits a blue laser beam. The laser projection device uses three-color laser beams to display images, achieving a larger color gamut and better color expression.

[0053] FIG. 4 is another optical path diagram of a light source, an optical engine, and a lens in a projection device according to some embodiments.

[0054] The illumination beam emitted by the light source 10 enters the optical engine 20. As shown in Figures 3 and 4, the optical engine 20 includes a light pipe 210, a reflector 220, a lens assembly 230, a prism assembly 240, and a light valve 250. The light pipe 210 can receive the illumination beam provided by the light source 10 and homogenize the illumination beam. In addition, the outlet of the light pipe 210 can be rectangular, thereby having a shaping effect on the light spot. The reflector 220 can reflect the illumination beam to the lens assembly 230. The lens assembly 230 can converge the illumination beam to the prism assembly 240. The prism assembly 240 reflects the illumination beam to the light valve 250, which modulates the illumination beam to obtain a projection beam and reflects the projection beam to the lens 30. Of course, the light pipe 210 can also be replaced by a fly-eye lens or other components with light homogenization function, and this disclosure is not limited to this.

[0055] The light valve 250 uses the image signal to modulate the illumination beam provided by the light source 10. This means that the projection beam is controlled to display different brightness and grayscale levels for different pixels of the image to be displayed, ultimately forming an optical image. Depending on whether the light valve 250 transmits or reflects the illumination beam, the light modulator can be classified as a transmissive light modulator or a reflective light modulator. For example, the digital micromirror device (DMD) 250A shown in Figure 4 reflects the illumination beam and is a reflective light modulator. In contrast, the liquid crystal light valve transmits the illumination beam and is therefore a transmissive light modulator. Furthermore, depending on the number of light modulators used in the optical engine 20, the optical engine 20 can be classified as a single-chip system, a two-chip system, or a three-chip system.

[0056] FIG. 5 is a diagram illustrating an arrangement of tiny reflective mirrors in a digital micromirror device according to some embodiments.

[0057] In some embodiments of the present disclosure, the light valve 250 is a digital micromirror device 250A. As shown in FIG5 , the digital micromirror device 250A comprises thousands of individually rotatable micromirrors 2501. These micromirrors 2501 are arranged in an array, with each micromirror 2501 (e.g., each micromirror 2501) corresponding to a pixel in the projected image to be displayed. After processing, the image signal can be converted into digital codes such as 0 and 1. In response to these digital codes, the micromirrors 2501 can oscillate. The duration of each micromirror 2501's on and off states is controlled to achieve the grayscale of each pixel in a frame of the image. In this way, the digital micromirror device 250A can modulate the illumination beam, thereby enabling the display of the projected image. The on state of the micromirror 2501 is the state that the micromirror 2501 maintains when the illumination beam emitted by the light source 10, after being reflected by the micromirror 2501, can enter the lens 30. The off state of the micro-reflective lens 2501 is the state that the micro-reflective lens 2501 is in and can maintain when the illumination light beam emitted by the light source 10 does not enter the lens 30 after being reflected by the micro-reflective lens 2501 .

[0058] The light guide 210, reflector 220, and lens assembly 230 at the front end of the DMD 250A form an illumination light path. The illumination beam emitted by the light source 10 passes through the illumination light path to achieve the beam size and incident angle required by the DMD 250A. The projection screen 200 is spaced apart from the projection device 100 and is configured to receive the projection beam emitted by the projection device 100 for image display. For example, the projection screen 200 can be a curtain, a wall, a car windshield, or a display case window, although this disclosure is not limited thereto.

[0059] The following description takes the projection device 100 as a laser projection device, the laser projection device adopts red, green and blue lasers as the light source 10 , and the light valve 250 in the projection device 100 adopts a DMD as an example.

[0060] FIG6 is a structural diagram of another projection device according to some embodiments.

[0061] In some embodiments, as shown in FIG6 , the projection device 100 further includes a first controller 11, a second controller 12, and an imaging device 13. A light valve 250 is located on the light-emitting side of the light source 10, and a lens 30 is located on the optical path of the projection light beam emitted from the light valve 250. The first controller 11 is electrically connected to the second controller 12. The first controller 11 is configured to process received image data and transmit the processed image data and corresponding instructions to the second controller 12. The second controller 12 is electrically connected to the light valve 250 and configured to drive the light valve 250 to display an image.

[0062] When the projection device 100 displays an image, the first controller 11 receives image data and decodes the received image data. For example, the first controller 11 decodes the received image data into a low-voltage differential signal (LVDS). The first controller 11 sends the decoded image data to the second controller 12. The second controller 12 receives and processes the decoded image data into a drive signal, and drives the light valve 250 according to the drive signal to display the image. It should be noted that the first controller 11 can be a system on chip (SOC) in the projection device 100, and the second controller 12 can be a chip used to control the light valve 250 in a digital light processing (DLP) projection architecture.

[0063] The imaging device 13 is electrically connected to the first controller 11, and the first controller 11 can control the imaging device 13 to be turned on or off. For example, the imaging device 13 is electrically connected to the first controller 11 via a cable or adapter board, or is connected to the first controller 11 via Bluetooth communication. The imaging device 13 includes a photosensitive element. The photosensitive element is used to perform photoelectric conversion on the captured image light, converting the optical signal into an electrical signal that can be transmitted in a circuit, thereby generating image data. When the imaging device 13 is turned on, the imaging device 13 captures image data and sends the image data to the first controller 11 for image display.

[0064] FIG7 is a structural diagram of another projection system according to some embodiments. FIG8 is a structural diagram of yet another projection system according to some embodiments. In some implementations, as shown in FIG7 , the imaging device 13 is mounted on the projection screen 200; or, as shown in FIG8 , the projection device 100 further includes a housing 100A, and the imaging device 13 is disposed on the housing 100A. Of course, the imaging device 13 can also be disposed at other locations to accommodate corresponding usage scenarios. For example, the imaging device 13 is located within the housing 100A, as long as the imaging device 13 can capture ambient light. In some embodiments, as shown in FIG6 to FIG8 , the projection device 100 further includes a detection device 14. The detection device 14 is electrically connected to the first controller 11 and is configured to detect the brightness of the ambient light during image display and send the ambient light brightness to the first controller 11.

[0065] In some embodiments, the detection device 14 is integral with the imaging device 13. The detection device 14 can be integrated with the imaging device 13, or the imaging device 13 can be integrated with the detection device 14. The detection device 14 is disposed close to the imaging device 13 to facilitate accurate detection of the brightness of the ambient light captured by the imaging device 13.

[0066] Of course, in some embodiments, the detection device 14 may be provided separately from the imaging device 13 , and the detection device 14 may be integrated into the body of the projection device 100 , or integrated into the projection screen 200 , which is not limited in the present disclosure.

[0067] FIG9 is a schematic diagram of an imaging device shooting in low-light conditions according to some embodiments.

[0068] In some display scenarios (for example, in dark conditions), when shooting through the imaging device 13, the imaging device 13 needs to use ambient light for fill-in. As shown in Figure 9, the imaging device 13 is arranged on a side of the projection screen 200 away from the housing 100A (for example, the upper side), and the imaging device 13 uses the first light L1, the second light L2, and the third light L3 for fill-in. The first light L1 is natural light in the surrounding environment, and the second light L2 and the third light L3 are respectively laser lights emitted from the projection device 100. Under dark conditions, the second light L2 and the third light L3 are more than the first light L1. Since the photosensitive element in the imaging device 13 is more sensitive to the laser light emitted by the projection device 100, especially the red laser light, and the red laser light exceeds the color correction range of the imaging device 13 itself, if color correction is not performed, the displayed image is reddish and the display effect is poor.

[0069] To solve the above problems, some embodiments of the present disclosure provide a projection display method, which is applied to the above-mentioned projection device 100.

[0070] FIG. 10 is a chromaticity diagram of various colors according to some embodiments.

[0071] To facilitate explanation of the principles of color gamut conversion in some embodiments of the present disclosure, the relationship between multiple color coordinate points in the chromaticity diagram is described in conjunction with Figure 10. In color space, red, green, and blue can be mixed to form white. Red and blue can be mixed to form magenta, blue and green can be mixed to form cyan, and green and red can be mixed to form yellow. For example, as shown in Figure 10, in any color gamut (e.g., the triangular area surrounded by the dotted line in Figure 10), the magenta coordinate point M is located on the line connecting the red coordinate point R and the blue coordinate point B; the cyan coordinate point C is located on the line connecting the blue coordinate point B and the green coordinate point G; and the yellow coordinate point Y is located on the line connecting the red coordinate point R and the green coordinate point G. The magenta coordinate point M is located on the extension line of the line connecting the green coordinate point G and the white coordinate point W, the cyan coordinate point C is located on the extension line of the line connecting the red coordinate point R and the white coordinate point W, and the yellow coordinate point Y is located on the extension line of the line connecting the blue coordinate point B and the white coordinate point W. By adjusting the ratio of red, green, and blue components, the color coordinates of the white point can be adjusted. After determining the position of the color coordinates of red, green, and blue, the color gamut corresponding to the color coordinates of red, green, and blue can be determined.

[0072] FIG11 is a diagram illustrating an interface for hue, gain, and saturation functions for multiple colors according to some embodiments.

[0073] In addition, some embodiments of the present disclosure can perform color gamut conversion on the image captured by the camera device 13 through the second controller 12. For example, each color includes color characteristic parameters such as hue (Hue, H), gain (Gain, G) and saturation (Saturation, S). The second controller 12 can adjust the hue H, gain G and saturation S of each color to adjust the color gamut of the displayed image. For example, as shown in Figure 11, the picture displayed by the projection device 100 includes a functional interface (referred to as HSG functional interface) composed of the hue H, gain G and saturation S of each color. The user can call up the HSG functional interface through an external device, and adjust the color gamut of the displayed image by adjusting the hue H, gain G and saturation S of the corresponding color in the HSG functional interface. The above process can be called the HSG function of the second controller 12.

[0074] It should be noted that, typically, the aforementioned process of adjusting the color gamut of the displayed image can be performed in advance, and the adjusted color characteristic parameter values ​​can be set as fixed values ​​so that the user can directly call them to display the image in the corresponding color gamut. For example, by adjusting the hue, gain, and saturation corresponding to red, green, blue, cyan, yellow, magenta, and white, the color coordinates of the corresponding white point and the corresponding color gamut can be determined. In this way, the second controller 12 processes the image data according to the corresponding color gamut determined by the adjusted colors and drives the light valve 250 to display the image, thereby achieving the desired display effect.

[0075] Typically, projection devices include a camera to meet user needs for functions such as video calls. However, when the projection device displays images captured by the camera, the controller of the projection device does not perform color processing on the image data captured by the camera. In some scenarios, for example, when a user uses a camera to make a video call in low-light conditions, the camera will use ambient light for fill light. However, because the ambient light in low-light conditions contains more laser light from the projection device, the camera is more sensitive to the light from the laser light source, especially red laser light. This can cause the overall image displayed by the projection device to be reddish, affecting the display effect of the projection device.

[0076] In order to solve the above problems, some embodiments of the present disclosure provide a projection display method.

[0077] FIG12 is a flow chart of a projection display method according to some embodiments.

[0078] In some embodiments, as shown in FIG12 , the method includes steps 101 to 104 .

[0079] In step 101, the first controller 11 receives a first instruction, controls the imaging device 13 to turn on, and controls the detection device 14 to detect the current brightness of the ambient light. The first instruction instructs the first controller 11 to control the imaging device 13 to turn on.

[0080] In step 102, the first controller 11 determines a target camera image mode according to the correspondence between brightness and camera image modes. The target camera image mode is the camera image mode corresponding to the current brightness.

[0081] In step 103 , the first controller 11 sends first notification information to the second controller 12 according to the target camera image mode.

[0082] In step 104 , the second controller 12 calls the first characteristic parameter set corresponding to the determined target camera image mode according to the first notification information to process the image data collected by the camera device 13 and drive the light valve 250 to display the image.

[0083] In some embodiments of the present disclosure, the projection device 100 can meet the needs of various scenarios through the camera device 13. For example, a user can conduct a video call with other users through the projection device 100. Compared with mobile terminals, LCD TVs, laptops, computers, tablets, etc., projection displays have a larger display area, which can provide users with an immersive call experience. A user can conduct a remote conference with other users through a remote conference application. During the conference, the user can conduct a video call through a small window while displaying conference materials. A user can conduct remote learning through an educational learning application. During the learning process, the teacher can understand the student's learning status through video and enhance interaction with the student through video calls. When a user opens a game application to play a game, the camera device 13 can capture the user's movements. For example, when the user is playing a dance-related somatosensory game, the camera device 13 captures the user's dance movements. By detecting and tracking limbs and detecting key points of the human skeleton, the user's dance movements can be scored. The user can also observe their own movements through a small window and make adjustments to them. The user can capture images through the camera device 13 to look in the mirror.

[0084] Of course, the projection device 100 can also meet the needs of other scenarios through the imaging device 13 to achieve more or fewer functions, and this disclosure is not limited to this. The user can send the first instruction to the first controller 11, and the first controller 11 controls the imaging device 13 to turn on in response to the first instruction, thereby achieving at least one function in the above-mentioned multiple scenarios.

[0085] Figure 13 is a schematic diagram of a remote control for a projection device according to some embodiments. Figure 14 is a structural diagram of another projection device according to some embodiments. Figure 15 is a schematic diagram of a social application interface according to some embodiments.

[0086] In some embodiments, the user may send the first instruction to the first controller 11 via an external device. The external device includes a remote controller, a button on the projection device 100, or other device and control device that can send control instructions.

[0087] As shown in FIG13 , the projection system 1 also includes a remote control 60. The remote control 60 can communicate with the projection device 100 via infrared, Bluetooth, ZigBee, or other short-range communication methods. A user can press a button on the remote control 60 to send a command to the projection device 100, thereby controlling the projection device 100 to perform a corresponding operation. For example, as shown in FIG13 , the remote control 60 includes a first button, which can be the "Camera On / Off" button in FIG13 . When the imaging device 13 is off, after the user presses the first button, the remote control 60 sends the first command to the projection device 100. Upon receiving the first command, the first controller 11 controls the imaging device 13 to turn on. When the imaging device 13 is on, after the user presses the first button, the remote control 60 sends a second command to the projection device 100. Upon receiving the second command, the first controller 11 controls the imaging device 13 to turn off. The second command instructs the first controller 11 to control the imaging device 13 to turn off.

[0088] In some embodiments, the projection device 100 has a voice recognition function, and the user can control the camera 13 to turn on or off by voice input or other means, which is not limited in this disclosure. Alternatively, as shown in Figure 14, the projection device 100 is provided with multiple buttons. The multiple buttons include the first button. After the user presses the first button, the projection device 100 executes the instruction similarly to the above, and will not be further described here.

[0089] When the user needs to look in the mirror through the projection device 100, the camera device 13 can be controlled to turn on through the first button on the remote control 60 or the first button on the projection device 100. The camera device 13 collects portrait data and then projects it for display. The user can organize his or her clothes according to the displayed content.

[0090] It should be noted that the external device may be a smart device, such as a mobile terminal, a tablet computer, a computer, a laptop computer, etc. The external device may communicate with the projection device 100 via various methods such as a network, infrared, or a data cable, and may send instructions via various methods such as buttons, voice input, and gesture input, which are not limited in this disclosure.

[0091] In some embodiments, a user can control the camera 13 to turn on by selecting a camera function such as taking a photo or making a video in the application software. As shown in Figure 15, when a user uses a social application, they can chat through text, voice, video, etc. The social application provides options such as taking a photo or making a video call. After the user selects the relevant option through the external device, the first controller 11 can receive the first instruction and control the camera 13 to turn on. Alternatively, in some application scenarios, the user can accept a video call invitation sent by another user, thereby controlling the camera 13 to turn on and start the video call. This disclosure is not limited to this.

[0092] The foregoing mainly uses the example of the first controller 11 controlling the camera device 13 to turn on after receiving the first instruction in various scenarios. Of course, the first controller 11 can also control the camera device 13 to turn on after receiving the first instruction under various other conditions, and the present disclosure does not limit this.

[0093] When the first controller 11 controls the imaging device 13 to turn on after receiving the first instruction, the first controller 11 controls the detecting device 14 to detect the current brightness of the ambient light.

[0094] The detection device 14 sends the detected current brightness to the first controller 11. The correspondence between brightness and camera image mode can be pre-set and stored in the first controller 11. The first controller 11 can determine the target camera image mode based on the current brightness and the correspondence between brightness and camera image mode. The target camera image mode is the camera image mode corresponding to the current brightness. The camera image mode is an image mode that displays the image data collected by the camera device 13. One camera image mode corresponds to one color gamut, and the color gamut corresponding to the camera image mode can be adjusted according to the characteristics of the image captured by the camera device 13 under the corresponding brightness conditions. In this way, the corresponding camera image mode can be used to display the captured image under different brightness conditions to make the image color balanced.

[0095] After determining the camera image mode corresponding to the current brightness (the target camera image mode), the first controller 11 sends a first notification message according to the target camera image mode to the second controller 12. The first notification message indicates the determined target camera image mode.

[0096] The second controller 12 pre-stores multiple first feature parameter sets, each corresponding to a camera image mode. Each first feature parameter set includes multiple color feature parameters, each of which falls within a corresponding color gamut. Upon receiving the first notification message, the second controller 12 invokes the first parameter set corresponding to the target camera image mode based on the first notification message to process the image data captured by the imaging device 13 and drives the light valve 250 to display the image captured by the imaging device 13. For example, the second controller 12 processes the image data captured by the imaging device into a drive signal, which it then drives the light valve 250 to display the image.

[0097] In some embodiments of the present disclosure, when the projection device 100 displays the image captured by the camera device 13, the detection device 13 can detect the current brightness of the ambient light, and the first controller 11 determines the current camera image mode based on the current brightness. The second controller 12 calls the corresponding color feature parameter set (such as the corresponding first feature parameter set) according to the target camera image mode, and performs color gamut conversion on the image data collected by the camera device 13, so that the image captured by the camera device 13 can be displayed using the corresponding color gamut under different brightness conditions. Through this projection display method, when the first controller 11 does not perform color gamut conversion on the image data collected by the camera device 13, the HSG function of the second controller 12 can be used to display the image captured by the camera device 13 using the corresponding color gamut for different ambient brightnesses, so that the image captured by the camera device 13 displayed by the projection device 100 can be color balanced.

[0098] FIG16 is another flowchart of a projection display method according to some embodiments.

[0099] In some embodiments, as shown in FIG. 16 , the method includes steps 201 to 204 .

[0100] In step 201 , the first controller 11 receives a first instruction, controls the camera 13 to turn on, and controls the detection device 14 to detect the current brightness of the ambient light.

[0101] In step 202 , the detection device 14 determines whether the current brightness is greater than or equal to a preset brightness threshold. If yes, step 203 is executed; if no, step 204 is executed.

[0102] The preset brightness threshold can be pre-set as a fixed value and stored in the first controller 11. It should be noted that the preset brightness threshold can be determined based on the image quality of the imaging device 13 under different brightness conditions. For example, without color adjustment, the brightness at which the image captured by the imaging device 13 exhibits visible color deviation to the human eye can be used as the preset brightness threshold. Of course, other brightness levels can also be used as the preset brightness threshold, and this disclosure is not limited to this.

[0103] In step 203 , the first controller 11 determines that the target camera image mode is the first camera image mode.

[0104] In some embodiments, the camera image mode includes a first camera image mode and a second camera image mode.

[0105] When the detection device 14 detects that the current brightness is greater than or equal to the preset brightness threshold, the first controller 11 determines that the target camera image mode is the first camera image mode. In this way, when the brightness of the ambient light is high, the image captured by the camera device 13 can be displayed in the first camera image mode.

[0106] In step 204 , the first controller 11 determines that the target camera image mode is the second camera image mode.

[0107] When the detection device 14 detects that the current brightness is less than the preset brightness threshold, the first controller 11 determines that the target camera image mode is the second camera image mode. In this way, when the brightness of the ambient light is low, the image captured by the camera device 13 can be displayed in the second camera image mode.

[0108] In some embodiments, the multiple color characteristic parameters of the first characteristic parameter set correspond to multiple colors respectively. For example, the multiple colors include at least red, green, blue, cyan, magenta, yellow and white. By setting the hue, saturation and gain of the seven colors respectively, a color gamut can be determined. Of course, the multiple color characteristic parameters of the first characteristic parameter set can also include color characteristic parameters of multiple transition colors between red, green, blue, cyan, magenta, yellow and white, which is not limited in this disclosure. It should be noted that the more color characteristic parameters of different colors included in the characteristic parameter set, the finer the adjustment, and the better the display effect of the projection device 100.

[0109] Since the images captured by the imaging device 13 under dark light conditions usually show an overall reddish characteristic, the gain of red in the first characteristic parameter set corresponding to the first camera image mode can be set to be greater than the gain of red in the first characteristic parameter set corresponding to the second camera image mode. The gain of green in the first characteristic parameter set corresponding to the first camera image mode is less than the gain of green in the first characteristic parameter set corresponding to the second camera image mode. The gain of blue in the first characteristic parameter set corresponding to the first camera image mode is less than the gain of blue in the first characteristic parameter set corresponding to the second camera image mode. In some embodiments of the present disclosure, the hue, saturation and gain corresponding to multiple colors can be adjusted separately according to the characteristics of the images captured by different imaging devices 13, and the present disclosure is not limited to this.

[0110] FIG17 is a flowchart of a method for determining the value of color characteristic parameters corresponding to each color in the first characteristic parameter set according to some embodiments.

[0111] In some embodiments, as shown in FIG. 17 , the method includes steps 301 to 306 .

[0112] In step 301 , the second controller 12 determines initial values ​​of hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white, respectively.

[0113] The second controller 12 needs to determine the initial values ​​of the hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white. For example, the hue, saturation, and gain corresponding to the red, green, blue, cyan, magenta, yellow, and white colors that meet the preset color gamut of the projection device 100 are used as the initial values. For example, the initial value of the hue is set to 0, the initial value of the saturation is set to 1, and the initial value of the gain is set to 1. In this way, the initial values ​​of the hue, saturation, and gain of the seven colors that meet the preset color gamut of the projection device 100 are: red R0 (0, 1, 1), green G0 (0, 1, 1), blue B0 (0, 1, 1), cyan C0 (0, 1, 1), magenta M0 (0, 1, 1), yellow Y0 (0, 1, 1), and white W0 (0, 1, 1). The preset color gamut of the projection device 100 is the largest color gamut used by the projection device when displaying images.

[0114] In step 302, the detection device 14 determines whether the current brightness of the ambient light is greater than or equal to a preset brightness threshold. If "yes", steps 303 to 304 are executed; if "no", steps 305 to 306 are executed.

[0115] The detection device 14 can determine whether the current brightness of the ambient light is greater than or equal to a preset brightness threshold. Of course, the present disclosure is not limited to this. The first controller 11 can also determine whether the current brightness of the ambient light is greater than or equal to a preset brightness threshold.

[0116] In step 303, the second controller 12 adjusts the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white respectively within the set adjustment range, and determines the values ​​of hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that meet the color gamut corresponding to the first camera image mode as the setting values ​​of the first characteristic parameter set corresponding to the first camera image mode.

[0117] When the brightness of the ambient light is greater than or equal to the preset brightness threshold, the second controller 12 sequentially adjusts the hue, saturation, and gain of red, green, blue, cyan, magenta, yellow, and white within the set adjustment range, so as to determine the hue H, saturation S, and gain G values ​​corresponding to the seven colors that meet the color range corresponding to the first camera image mode as the set values ​​of the first characteristic parameter set corresponding to the first camera image mode. The hue H, saturation S, and gain G values ​​corresponding to the seven colors that meet the color range corresponding to the first camera image mode are as follows: red R1 (H 2), green R2 (H 3), blue R3 (H 4), magenta R4 (H 5), yellow R5 (H 6), and white R7 (H 7). R1 ,S R1 ,G R1 )、Green G1(H G1 ,S G1 ,G G1 )、Blue B1(H B1 ,S B1 ,G B1 )、cyan C1(H C1 ,S C1 ,G C1 )、Magenta M1(H M1 ,S M1 ,G M1 )、Yellow Y1(H Y1 ,S Y1 ,G Y1 ) and white W1(H W1 ,S W1 ,G W1 ).

[0118] In step 304, the second controller 12 determines the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white through linear interpolation, thereby determining the values ​​of the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the first camera image mode.

[0119] After determining the setting value of the first characteristic parameter set corresponding to the first camera image mode, the second controller 12 performs linear interpolation on the hue, saturation and gain values ​​corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white to determine the values ​​of the color characteristic parameters corresponding to the transition colors, thereby realizing the values ​​of the color characteristic parameters corresponding to multiple colors in the first characteristic parameter set.

[0120] In step 305, the second controller 12 adjusts the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white respectively within the set adjustment range, and determines the values ​​of the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that meet the color gamut corresponding to the second camera image mode as the set values ​​of the first characteristic parameter set corresponding to the second camera image mode.

[0121] When the ambient brightness is less than the preset brightness threshold, the second controller 12 sequentially adjusts the hue, saturation, and gain values ​​of red, green, blue, cyan, magenta, yellow, and white within the set adjustment range, and determines the hue H, saturation S, and gain G values ​​corresponding to each color when the color range corresponding to the second camera image mode is satisfied as the set values ​​of the first characteristic parameter set corresponding to the second camera image mode. The hue H, saturation S, and gain G values ​​corresponding to each color when the color range corresponding to the second camera image mode is satisfied include: red R2 (H R2 ,S R2 ,G R2 )、Green G2(H G2 ,S G2 ,G G2 )、Blue B2(H B2 ,S B2 ,G B2 )、cyan C2(H C2 ,S C2 ,G C2 )、Magenta M2(H M2 ,S M2 ,G M2 )、Yellow Y2(H Y2 ,S Y2 ,G Y2 ) and white W2(H W2 ,S W2 ,G W2 ).

[0122] In step 306, the second controller 12 determines the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white through linear interpolation, thereby determining the values ​​of the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the second camera image mode.

[0123] After determining the setting value of the first characteristic parameter set corresponding to the second camera image mode, the second controller 12 performs linear interpolation on the hue, saturation and gain values ​​corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white to determine the values ​​of the color characteristic parameters corresponding to each color.

[0124] It should be noted that linear interpolation can be performed automatically through the built-in program of the second controller 12, or it can be performed through an external program, and the corresponding characteristic parameter set obtained after linear interpolation is imported into the second controller 12 for storage, which is not limited in this disclosure.

[0125] Table 1 Setting values ​​of the first feature parameter set corresponding to the first camera image mode and setting values ​​of the first feature parameter set corresponding to the second camera image mode

[0126] The above mainly uses the example that the camera image mode includes two image modes. Of course, in some embodiments, the camera image mode can also include more than three image modes. Accordingly, more than three first characteristic parameter sets can be stored in the second controller 12. This disclosure does not limit this.

[0127] FIG18 is a schematic diagram of image data flow according to some embodiments.

[0128] In some embodiments, in addition to the image data captured by the camera 13, the image data received by the first controller 11 also includes first data and second data. The first data may be multimedia data. For example, the first data may include High Definition Multimedia Interface (HDMI) video data, Analog Television (ATV) video data, Digital Television (DTV) video data, and video data input via a Universal Serial Bus (USB) interface. The first data may be input to the first controller 11 via a network, an antenna, a closed-circuit television, a memory card, or the like. The second data is image data (e.g., menu data) generated by an image generator within the projection device 100. The first data corresponds to a first image (i.e., a multimedia image), and the second data corresponds to a second image (i.e., a menu image). The first and second images will be described below. As shown in FIG18 , during image display by the projection device 100, the first controller 11 continuously receives image data, decodes the image data, and transmits it to the second controller 12. For example, the first controller 11 decodes image data of different formats into low-voltage differential signaling (LVDS). LVDS has the characteristics of low power consumption, low bit error rate (SER), low crosstalk, and low radiation, which can improve the transmission quality of image signals.

[0129] FIG19 is a schematic diagram of a projection screen according to some embodiments.

[0130] In some embodiments, as shown in FIG19 , the projection device 100 can display the image captured by the camera 13 in full screen. For example, when a user uses the projection device 100 to look in the mirror, the projection device 100 can display the image captured by the camera 13 in full screen, allowing the user to observe and adjust their clothing and posture.

[0131] The projection device 100 can also use a small window mode to display the image captured by the camera device 13, and display the first image or the second image in the background. For example, as shown in Figure 19, when a user is watching a TV program, the user receives a video call invitation from another user. After the user accepts the video call invitation, the user can watch the TV program while conducting the video call in a part of the projected image (such as the small window in the upper left corner). Here, the image displayed in the rectangular area surrounded by vertices A, B, C, and D in Figure 19 is the image captured by the camera device 13.

[0132] After receiving the image data, the first controller 11 may identify the type of the image data. The image data type may include at least one of the first data, the second data, and the third data. The third data may be image data captured by the imaging device 13. As shown in FIG18 , when the first controller 11 identifies the third data, it does not perform color gamut conversion on the third data.

[0133] In this case, if the projection device 100 displays the image captured by the camera 13 in small window mode, the first controller 11 parses the image data and sends the parsed image data, the first notification information, and the vertex coordinates of the display area corresponding to the image data captured by the camera 13 (e.g., the coordinates of vertex A, vertex B, vertex C, and vertex D) to the second controller 12. The second controller 12 then calls the first feature parameter set corresponding to the target camera image mode based on the first notification information, parses the image data within the vertex coordinates, and drives the light valve 250 to display the image. Here, the image data may include the first data and the third data.

[0134] If the projection device 100 uses full-screen mode to display the image captured by the camera device 13, the first controller 11 can shield the first data and the second data to send the parsed third data and the first notification information to the second controller 12. The second controller 12 calls the first characteristic parameter set corresponding to the target camera image mode according to the first notification information, processes the received image data, and drives the light valve 250 to display the image. Alternatively, the projection device 100 can also use the same method as in the small window mode to display the image captured by the camera device 13 in full screen, and the present disclosure does not limit this. It should be noted that the color gamut conversion method for the image captured by the camera device 13 when it is displayed in a small window or full screen is not limited to the embodiment described above. The color gamut conversion method for the image captured by the camera device 13 when it is displayed in a small window or full screen can also include other methods, and the present disclosure does not limit this.

[0135] FIG20 is another flowchart of a projection display method according to some embodiments.

[0136] In some embodiments, as shown in FIG. 20 , the method further includes steps 401 to 406 .

[0137] In step 401 , upon receiving the second instruction, the first controller 11 controls the imaging device 13 to be turned off.

[0138] In step 402, the first controller 11 determines whether the type of the currently input image data is the second data. If "yes", steps 403 to 404 are executed; if "no", steps 405 to 406 are executed.

[0139] After receiving the image data, the first controller 11 decodes the image data and determines whether the type of the currently input image data is the second data. It should be noted that since the first controller 11 controls the imaging device 13 to turn off upon receiving the second instruction, the currently input image data does not include the third data.

[0140] In step 403 , the first controller 11 sends the second notification information to the second controller 12 .

[0141] If the first controller 11 determines that the type of image data currently being input is the second data, the first controller 11 generally does not perform color gamut conversion on the second data, and directly uses the color gamut preset by the projection device 100 to display the second image. In this case, since the color gamut preset by the projection device 100 is large, the color display effect of the second image is poor. In some embodiments of the present disclosure, the display effect of the second image displayed by the projection device 100 can be improved by performing color gamut conversion on the second data by the second controller 12. For example, after the first controller 11 determines that the type of image data currently being input is the second data, the first controller 11 sends the second data and the second notification information to the second controller 12. The second notification information indicates that the image data currently being input is the second data.

[0142] In step 404 , the second controller 12 calls a second characteristic parameter set in response to the second notification information to process the second data, and drives the light valve 250 to display the second image.

[0143] The second controller 12 also pre-stores a second feature parameter set. This second feature parameter set includes multiple color feature parameters. These multiple color feature parameters correspond to the color gamut for displaying the second image. In response to the second notification information, the second controller 12 invokes the second feature parameter set to process the second data and drives the light valve 250 to display the second image. The method for obtaining values ​​for each color feature parameter in the second feature parameter set is the same as that for each color feature parameter in the first feature parameter set and is not further described here.

[0144] In step 405 , the first controller 11 performs color gamut conversion on the first data according to the color gamut currently set by the projection device 100 , and sends the first data after the color gamut conversion to the second controller 12 .

[0145] When the first controller 11 determines that the type of the currently input image data is the first data, the first controller 11 may directly perform color gamut conversion on the first data. For example, after determining that the type of the currently input image data is the first data, the first controller 11 performs color gamut conversion on the decoded first data according to the color gamut currently set by the projection device 100, and sends the first data after color gamut conversion to the second controller 12.

[0146] In step 406 , the second controller 12 parses the received first data into a driving signal, and drives the light valve 250 according to the driving signal to display the first image.

[0147] The second controller 12 directly interprets the received first data into a drive signal and, based on the drive signal, drives the light valve 250 to display the first image. The first controller 11 may pre-store multiple multimedia image modes for displaying the first image, with each multimedia image mode corresponding to a color gamut. When a user selects a multimedia image mode, the color gamut corresponding to that multimedia image mode becomes the currently selected color gamut. Of course, after the camera 13 is turned off, some embodiments of the present disclosure may also include other projection display methods, which are not limited by this disclosure.

[0148] Through the projection display method of some embodiments of the present disclosure, the image captured by the camera device 13 is displayed using the corresponding color gamut according to different ambient brightness, so that the projection device 100 can achieve a color balance effect when displaying the image captured by the camera device 13.

[0149] Some embodiments of the present disclosure further provide a projection device, which has a similar structure to the projection device 100 . For example, the projection device includes the light valve 250 , the first controller 11 , the second controller 12 , the imaging device 13 , and the detection device 14 .

[0150] In some embodiments, the first controller 11 is configured to: receive a first instruction, control the imaging device to turn on, and control the detection device to detect the current brightness; the first instruction is used to instruct the first controller to control the imaging device to turn on; determine a target imaging mode based on the correspondence between brightness and imaging modes; the target imaging mode is the imaging mode corresponding to the current brightness, the imaging mode is an image mode that displays image data captured by the imaging device, and one of the multiple imaging modes corresponds to a color gamut; send a first notification message to the second controller 12 based on the target imaging mode; the first notification message is used to represent the target imaging mode. The second controller 12 is further configured to call a first feature parameter set corresponding to the target imaging mode based on the first notification message, process the image data captured by the imaging device, and drive the light valve to display the image; the second controller pre-stores multiple first feature parameter sets, one of the multiple first feature parameter sets corresponds to one of the multiple imaging modes, and the first feature parameter set includes multiple color feature parameters, and the color feature parameters are within the corresponding color gamut.

[0151] In some embodiments, the image mode includes a first camera image mode and a second camera image mode.

[0152] The second controller 12 is further configured to determine initial values ​​of hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white, respectively.

[0153] If the current brightness of the ambient light is greater than or equal to a preset brightness threshold, the second controller 12 is further configured to: adjust the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white respectively within the set adjustment range, and determine the values ​​of the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that satisfy the color gamut corresponding to the first camera image mode as the set values ​​of the first characteristic parameter set corresponding to the first camera image mode; determine the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white by linear interpolation, thereby determining the values ​​of the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the first camera image mode.

[0154] If the current brightness of the ambient light is less than a preset brightness threshold, the second controller 12 is further configured to: adjust the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white respectively within the set adjustment range, and determine the values ​​of the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that satisfy the color gamut corresponding to the second camera image mode as the set values ​​of the first characteristic parameter set corresponding to the second camera image mode; determine the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white by linear interpolation, so as to determine the values ​​of the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the second camera image mode. In some embodiments, the first controller 11 is configured to: control the camera device to turn off when receiving the second instruction; determine the type of image data currently input, and the image data also includes at least one of the first data or the second data; the second instruction is used to instruct the first controller 11 to control the camera device 13 to turn off.

[0155] If the input image data type is first data, the first controller 11 is configured to perform color gamut conversion on the first data according to the color gamut currently set by the projection device, and send the first data after color gamut conversion to the second controller 12; in this case, the second controller 12 is configured to process the received first data into a driving signal, and drive the light valve 250 according to the driving signal to display the first image.

[0156] If the input image data type is second data, the first controller 11 is configured to send a second notification message; the second notification message is used to indicate that the currently input image data is the second data; the second controller 12 is also configured to call a second characteristic parameter set in response to the second notification message to process the second data, and drive the light valve 250 to display the second image; the second controller 12 also pre-stores a second characteristic parameter set, which includes multiple color characteristic parameters, and the multiple color characteristic parameters correspond to the color gamut of the second image.

[0157] In some embodiments, the first feature parameter set and the second feature parameter set respectively include color feature parameters of multiple colors, and the color feature parameters include at least hue, saturation and gain; the multiple colors include at least: red, green, blue, cyan, magenta, yellow and white.

[0158] In some embodiments, the gain of red in the first characteristic parameter set corresponding to the first camera image mode is greater than the gain of red in the first characteristic parameter set corresponding to the second camera image mode; the gain of green in the first characteristic parameter set corresponding to the first camera image mode is less than the gain of green in the first characteristic parameter set corresponding to the second camera image mode; the gain of blue in the first characteristic parameter set corresponding to the first camera image mode is less than the gain of blue in the first characteristic parameter set corresponding to the second camera image mode.

[0159] When projecting images, using a color gamut appropriate for the image content can restore the image's colors and achieve optimal display quality. Typically, projecting devices can perform color gamut conversion using chips with color gamut conversion capabilities, but these chips have limited conversion capabilities, and some other chips do not have this capability.

[0160] FIG21 is a color coordinate diagram of a projection device according to some embodiments.

[0161] In the case where the projection device 100 uses a three-color laser as the light source 10, when the projection device 100 displays an image, the size of the color gamut that the projection device 100 can display is related to the color purity of the red laser beam, the green laser beam, and the blue laser beam emitted by the light source 10. The wavelength half-peak width of the laser beam emitted by the laser is narrow and the color purity is high. Therefore, as shown in Figure 21, the color gamut when the projection device 100 displays an image (such as the area of ​​the triangle surrounded by the dotted line corresponding to the projection device 100 in Figure 21) is larger than the maximum color gamut defined by the color gamut standard (such as the area of ​​the triangle surrounded by the dotted line corresponding to BT2020 in Figure 21). In this way, the image displayed by the projection device 100 can meet the user's demand for a large color gamut image.

[0162] When projecting images, using a color gamut appropriate for the image content can restore the image's colors and achieve optimal display quality. Typically, projectors can perform color gamut conversion using chips with color gamut conversion capabilities, but these chips have limited capabilities, and some other chips lack this functionality.

[0163] FIG22 is a structural diagram of yet another projection device according to some embodiments.

[0164] In order to solve the above problems, some embodiments of the present disclosure also provide a projection device. As shown in Figure 22, except that the camera device 13 and the detection device 14 are not included, the structure of the projection device is the same as that of the above-mentioned projection device 100. It should be noted that the color gamut conversion principle in some embodiments of the present disclosure and the HSG function corresponding to the second controller 12 can be found in the relevant description in the previous text and will not be repeated here. In some embodiments, the projection device 100 has multiple image modes. The multiple image modes include at least artificial intelligence (AI) mode, standard mode, soft mode, vivid mode and custom mode, and the AI ​​mode, the standard mode, the soft mode, the vivid mode and the custom mode will be described below. One image mode corresponds to one color gamut. When switching to different image modes, the projection device 100 can use different color gamuts for image display. When the projection device 100 displays an image, the user can switch the projection device 100 between multiple image modes.

[0165] In order to achieve switching between different image modes, the second controller 12 pre-stores multiple target feature parameter sets, and each target feature parameter set corresponds to one image mode. The target feature parameter set includes multiple color feature parameters, and the color feature parameters are located within the corresponding color gamut. The color feature parameters include hue, saturation, and gain, and the multiple color feature parameters included in a target feature parameter set correspond to multiple colors. By setting the values ​​of hue, saturation, and gain corresponding to each color in each target feature parameter set, the color gamut corresponding to each target feature parameter set can be determined. In this case, when the projection device 100 displays an image, the second controller 12 performs color gamut conversion by calling the color feature parameters corresponding to the image mode.

[0166] In some embodiments, the target feature parameter set includes feature parameters for multiple colors. For example, the multiple colors include at least red, green, blue, cyan, magenta, yellow, and white. By setting the hue, saturation, and gain of these seven colors, a color gamut can be determined. In some embodiments, the target feature parameter set may also include color feature parameters for multiple transition colors between red, green, blue, cyan, magenta, yellow, and white.

[0167] Some embodiments of the present disclosure further provide a projection display method, which is applied to the projection device 100 .

[0168] FIG23 is another flowchart of a projection display method according to some embodiments.

[0169] In some embodiments, as shown in FIG. 23 , the method includes steps 501 to 503 .

[0170] In step 501 , the first controller 11 receives a target instruction.

[0171] During the process of the projection device 100 displaying an image, the first controller 11 may receive a target instruction that instructs the projection device 100 to switch to a corresponding image mode for image display.

[0172] In step 502 , the first controller 11 sends target notification information to the second controller 12 according to the target instruction.

[0173] In step 503, the second controller 12 calls the target characteristic parameter set corresponding to the currently switched image mode according to the target notification information, processes the current image data into a driving signal, and drives the light valve 250 according to the driving signal to display the image.

[0174] Figure 24 is another schematic diagram of a remote control for a projection device according to some embodiments. Figure 25 is a structural diagram of yet another projection device according to some embodiments. Figure 26 is another schematic diagram of a menu interface according to some embodiments.

[0175] In some embodiments, the user may send the target instruction to the first controller 11 through an external device. For example, the external device includes a remote controller, a button on the projection device 100, and other devices and control devices that can send control instructions.

[0176] As shown in Figure 24 , the projection system 1 also includes a remote control 60. The remote control 60 can communicate with the projection device 100 via infrared, Bluetooth, ZigBee, or other short-range communication methods. A user can press a button on the remote control 60 to send a command to the projection device 100, thereby controlling the projection device 100 to perform a corresponding operation. For example, as shown in Figure 24 , the remote control 60 includes a second button, a third button, a fourth button, a fifth button, and a sixth button. The second button may be the AI ​​mode button shown in Figure 24 and corresponds to the AI ​​mode. The third button may be the standard mode button shown in Figure 24 and corresponds to the standard mode. The fourth button may be the soft mode button shown in Figure 24 and corresponds to the soft mode. The fifth button may be the vivid mode button shown in Figure 24 and corresponds to the vivid mode. The sixth button may be the custom mode button shown in Figure 24 and corresponds to the custom mode. Each image mode button corresponds to a specific image mode, and each image mode corresponds to a specific color gamut, thereby achieving a specific image display effect. When the user presses a button corresponding to any one of the multiple image modes on the projection device 100 , the remote controller 60 sends the target instruction corresponding to the currently selected image mode to the first controller 11 .

[0177] In some embodiments, the projection device 100 has a voice recognition function, and the user can switch the image mode through voice input or other methods, which is not limited in this disclosure.

[0178] Alternatively, as shown in FIG25 , the projection device 100 is provided with multiple buttons, including the second button, the third button, the fourth button, the fifth button, and the sixth button. Each image mode button corresponds to a different image mode, and each image mode corresponds to a different color gamut, thereby achieving a different image display effect. When a user presses a button corresponding to any of the multiple image modes, the corresponding button sends the target instruction corresponding to the currently selected image mode to the first controller 11.

[0179] It should be noted that the external device may be a smart device, such as a mobile terminal, a tablet computer, a computer, a laptop computer, etc. The external device may communicate with the projection device 100 via various methods such as a network, infrared, or a data cable, and may send instructions via various methods such as buttons, voice input, and gesture input, which are not limited in this disclosure.

[0180] Alternatively, in some embodiments, the user can access the menu interface of the projection device 100 through the external device. As shown in FIG26 , the menu interface can provide options for multiple image modes, such as the AI ​​mode, the standard mode, the soft mode, the vivid mode, and the custom mode. One image mode button corresponds to one image mode, and one image mode corresponds to one color gamut, thereby achieving an image display effect. After the user selects any one of the multiple image modes through the external device, the first controller 11 can receive the image mode selected by the user. For example, as shown in FIG26 , the user selects the soft mode through the external device.

[0181] It should be noted that the type of image mode and the method of sending the target instruction may also be of other types and methods. The first controller 11 may also receive the target instruction under other conditions, which is not limited in this disclosure.

[0182] After receiving the target instruction, the first controller 11 sends corresponding target notification information to the second controller 12 according to the received target instruction. The target notification information indicates the currently switched image mode. For example, after receiving the target instruction sent by the user through an external device, the first controller 11 sends the corresponding target notification information to the second controller 12, or the first controller 11 may send the target notification information to the second controller 12 after receiving the image mode selected by the user in the menu interface, which is not limited in this disclosure.

[0183] After receiving the target notification information sent by the first controller 11, the second controller 12 invokes the target feature parameter set corresponding to the currently switched image mode based on the received target notification information, processes the current image data, and drives the light valve 250 for image display. For example, the second controller 12 processes the image data into a drive signal that can drive the light valve 250 for image display. After receiving the target notification information, the second controller 12 invokes the target feature parameter set corresponding to the currently switched image mode based on the target notification information and processes the received image data into a drive signal. Based on the processed drive signal, the second controller 12 drives the light valve 250 for image display, enabling the projection device 100 to display images using the color gamut corresponding to the image mode selected by the user.

[0184] In the projection display method provided in some embodiments of the present disclosure, the second controller 12 pre-stores multiple target feature parameter sets corresponding to multiple image modes. One image mode corresponds to one color gamut. During the image display process of the projection device 100, the second controller 12 can call the corresponding target feature parameter set according to the image mode selected by the user, process the image data, and drive the light valve 250 to display the image according to the drive signal obtained after processing. In addition, by utilizing the HSG function of the second controller 12, switching between multiple color gamuts can be achieved under the condition that the first controller 11 has limited color gamut conversion function or does not have color gamut conversion function, which has wide applicability.

[0185] FIG27 is another flowchart of a projection display method according to some embodiments.

[0186] In some embodiments, as shown in FIG. 27 , the method further includes steps 601 to 605 .

[0187] In step 601 , the first controller 11 receives image data, decodes the image data, and sends the decoded image data to the second controller 12 .

[0188] During image display by the projection device 100, the first controller 11 continuously receives image data, decodes the image data, and transmits it to the second controller 12. For example, the first controller 11 decodes image data of various formats into low-voltage differential signals. Low-voltage differential signals offer low power consumption, low bit error rate, low crosstalk, and low radiation, improving the transmission quality of image signals. The image data may include first data and second data. The first and second data are described above and are not further elaborated here.

[0189] In step 602 , the first controller 11 determines whether the target instruction is received. If yes, steps 603 to 604 are executed; if no, step 605 is executed.

[0190] In step 603 , the first controller 11 sends the corresponding target notification information to the second controller 12 according to the target instruction.

[0191] If the first controller 11 receives the target instruction during the process of the projection device 100 displaying an image, the first controller 11 sends the target notification information to the second controller 12 .

[0192] In step 604 , the second controller 12 calls the target feature parameter set corresponding to the currently switched image mode according to the target notification information, processes the current image data, and drives the light valve 250 to display the image.

[0193] After receiving the target notification information, the second controller 12 calls the target feature parameter set corresponding to the image mode indicated by the target notification information, processes the currently received image data, and drives the light valve 250 to display the image.

[0194] In step 605 , the second controller 12 processes the image data using the current target feature parameter set and drives the light valve 250 to display the image.

[0195] During image display by the projection device 100, if the first controller 11 does not receive the target instruction, the second controller 12, after receiving the image data, processes the image data using the current target feature parameter set and drives the light valve 250 for image display. Here, the current target feature parameter set is the target feature parameter set corresponding to the image mode last switched by the projection device 100. It should be noted that if the projection device 100 is powered on for the first time to display an image, the second controller 12 uses the target feature parameter set corresponding to the default image mode to process the image data and drive the light valve 250 for image display.

[0196] For example, during an image display process of the projection device 100 , the first controller 11 receives image data, decodes the image data, and sends the decoded image data to the second controller 12 .

[0197] In this case, if the user does not switch the image mode during the current image display process, the second controller 12 uses the target feature parameter set corresponding to the image mode switched during the previous image display process of the projection device 100 for image display. For example, when the projection device 100 last displayed an image, the user selected the first sub-image mode for image display. During the current image display process, if the user does not switch the image mode, the second controller 12 still uses the target feature parameter set corresponding to the image mode selected during the previous image display process (i.e., the first sub-image mode) for image display. The first sub-image mode will be described below.

[0198] If the user switches the image mode during the current image display process, the second controller 12 will call the corresponding target feature parameter set for image display based on the switched image mode. For example, during the current image display process, if the user selects the second image mode for image display, the second controller 12 will call the target feature parameter set corresponding to the second image mode for image display based on the target notification information sent by the first controller 11. In this way, when the next image display is performed, the second controller 12 will continue to use the target feature parameter set corresponding to the second image mode for image display until the user switches the image mode again, at which point the second controller 12 will call the corresponding target feature parameter set for image display based on the image mode switched by the user.

[0199] Alternatively, during each image display process, the second controller 12 first uses the target feature parameter set corresponding to the default image mode of the projection device 100 to display the image. Thereafter, if the user switches the image mode, the second controller 12 calls the corresponding target feature parameter set according to the image mode switched by the user to display the image.

[0200] It should be noted that the image data may include a notification message. For example, the notification message corresponds to the first notification information, the second notification information, and the target notification information. Alternatively, the notification message may be a separate instruction, and the instruction is sent to the second controller 12. In addition, the first controller 11 does not decode the second data and directly sends the second data to the second controller 12.

[0201] It should be noted that the image display process may be any process in which the projection device 100 displays an image. For example, the image display process may include the process from power on to power off, the process from the start to the end of playback of a video source, the process from the start to the pause of playback of a video source, the process from the resumption of playback of a video source to the end of playback, the process from the start of playback of a video source to the switching to the next video source, or any process shorter or longer than the above processes during image display, which is not limited in this disclosure.

[0202] FIG28 is a flowchart of a method for determining the value of color characteristic parameters corresponding to each color in a target characteristic parameter set according to some embodiments.

[0203] In some embodiments, as shown in FIG. 28 , the method includes steps 701 to 703 .

[0204] In step 701 , the second controller 12 determines initial values ​​of hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white, respectively.

[0205] First, the second controller 12 needs to determine the initial values ​​of hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white respectively.

[0206] In some embodiments, the hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white when the color gamut preset by the projection device 100 is satisfied are used as initial values. For example, the initial value of the hue is set to 0, the initial value of the saturation is set to 1, and the initial value of the gain is set to 1. Thus, the initial values ​​of the hue, saturation, and gain of each color when the color gamut preset by the projection device 100 is determined to be: red R0 (0, 1, 1), green G0 (0, 1, 1), blue B0 (0, 1, 1), cyan C0 (0, 1, 1), magenta M0 (0, 1, 1), yellow Y0 (0, 1, 1), and white W0 (0, 1, 1).

[0207] In step 702, the second controller 12 adjusts the hue, saturation and gain values ​​corresponding to red, green, blue, cyan, magenta, yellow and white in sequence within the set range according to the color gamut corresponding to the target characteristic parameter set, and determines the hue, saturation and gain values ​​corresponding to red, green, blue, cyan, magenta, yellow and white when the color gamut corresponding to the target characteristic parameter set is met as the set values ​​of the target characteristic parameter set.

[0208] Then, the second controller 12 adjusts the hue, saturation and gain values ​​of red, green, blue, cyan, magenta, yellow and white in sequence within the set interval according to the color gamut corresponding to the target characteristic parameter set, and stores the hue, saturation and gain values ​​of red, green, blue, cyan, magenta, yellow and white when the color gamut corresponding to the target characteristic parameter set is met as the set values ​​of the target characteristic parameter set.

[0209] In step 703, the second controller 12 determines the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white by linear interpolation, thereby determining the value of the color characteristic parameter corresponding to each color.

[0210] The following description uses five different image modes as examples. The five different image modes include the first sub-image mode, the second sub-image mode, the third sub-image mode, the fourth sub-image mode, and the fifth sub-image mode. The color gamut corresponding to the fourth sub-image mode is the color gamut preset by the projection device 100. When adjusting the hue H, saturation S, and gain G of each color, red R0 (0, 1, 1), green G0 (0, 1, 1), blue B0 (0, 1, 1), cyan C0 (0, 1, 1), magenta M0 (0, 1, 1), yellow Y0 (0, 1, 1), and white W0 (0, 1, 1) can be directly determined as the set values ​​of the target feature parameter set corresponding to the fourth sub-image mode.

[0211] Adjust the hue H, saturation S, and gain G of each color within a set range so that the values ​​of the hue H, saturation S, and gain G of each color meet the color range corresponding to the first image mode. In this case, the hue H, saturation S, and gain G corresponding to each color after adjustment are determined as the set values ​​of the target feature parameter set corresponding to the first sub-image mode. For example, the 7 colors after adjustment are: red R1 (H R1 ,S R1 ,G R1 )、Green G1(H G1 ,S G1 ,G G1 )、Blue B1(H B1 ,S B1 ,G B1 )、cyan C1(H C1 ,S C1 ,G C1 )、Magenta M1(H M1 ,S M1 ,G M1 )、Yellow Y1(H Y1 ,S Y1 ,G Y1 ) and white W1(H W1 ,S W1 ,G W1 ), the hue H, saturation S and gain G corresponding to the 7 colors are determined as the set values ​​of the target feature parameter set corresponding to the first image mode.

[0212] Adjust the hue H, saturation S, and gain G of each color within the set range so that the values ​​of the hue H, saturation S, and gain G of each color meet the color range corresponding to the second image mode. In this case, the hue H, saturation S, and gain G corresponding to each color after adjustment are determined as the set values ​​of the target feature parameter set corresponding to the second image mode. For example, the 7 colors after adjustment are: red R2 (H R2 ,SR2 ,G R2 )、Green G2(H G2 ,S G2 ,G G2 )、Blue B2(H B2 ,S B2 ,G B2 )、cyan C2(H C2 ,S C2 ,G C2 )、Magenta M2(H M2 ,S M2 ,G M2 )、Yellow Y2(H Y2 ,S Y2 ,G Y2 ) and white W2(H W2 ,S W2 ,G W2 ), the hue H, saturation S and gain G corresponding to the 7 colors are determined as the set values ​​of the target feature parameter set corresponding to the second image mode.

[0213] Adjust the hue H, saturation S, and gain G of each color within the set range so that the values ​​of the hue H, saturation S, and gain G of each color meet the color range corresponding to the third image mode. In this case, the hue H, saturation S, and gain G corresponding to each color are determined as the set values ​​of the target feature parameter set corresponding to the third image mode. For example, the 7 colors after adjustment are: red R3 (H R3 ,S R3 ,G R3 )、Green G3(H G3 ,S G3 ,G G3 )、Blue B3(H B3 ,S B3 ,G B3 )、cyan C3(H C3 ,S C3 ,G C3 )、Magenta M3(H M3 ,S M3 ,G M3 )、Yellow Y3(H Y3 ,S Y3 ,G Y3 ) and white W3(H W3 ,S W3 ,G W3 ), the hue H, saturation S and gain G corresponding to the 7 colors are determined as the set values ​​of the target feature parameter set corresponding to the third image mode.

[0214] Adjust the hue H, saturation S, and gain G of each color within the set range so that the values ​​of the hue H, saturation S, and gain G of each color meet the color range corresponding to the fifth image mode. In this case, the hue H, saturation S, and gain G corresponding to each color are determined as the set values ​​of the target feature parameter set corresponding to the fifth image mode. For example, the 7 colors after adjustment are: red R5 (H R5 ,S R5 ,G R5 )、Green G5(H G5 ,S G5 ,G G5 )、Blue B5(H B5 ,S B5 ,G B5 )、cyan C5(H C5 ,S C5 ,G C5 )、Magenta M5(H M5 ,S M5 ,G M5 )、Yellow Y5(H Y5 ,S Y5 ,G Y5 ) and white W5(H W5 ,S W5 ,G W5 ), the hue H, saturation S and gain G corresponding to the seven colors are determined as the set values ​​of the target feature parameter set corresponding to the fifth image mode.

[0215] The adjustment range for hue H can be a closed interval with a lower limit of -1 and an upper limit of 1 (i.e., hue H is greater than or equal to -1 and less than or equal to 1). When hue H is 0, the hue H of the color is unchanged. The adjustment range for saturation S can be a closed interval with a lower limit of 0 and an upper limit of 2 (i.e., hue H is greater than or equal to 0 and less than or equal to 2). When saturation S is 0, all colors are removed; a saturation value of 2 sets the color to its maximum value; and a saturation value of 1 leaves the saturation unchanged. The adjustment range for gain G can be a closed interval with a lower limit of 0 and an upper limit of 2 (i.e., hue H is greater than or equal to 0 and less than or equal to 2). Gain changes the intensity level of the corresponding color. When the gain is 1, the nominal setting is used. When the gain is less than 1, the color becomes darker; and when the gain is 2, the color is brightest.

[0216] Table 2 The target feature parameter set corresponding to each image mode after adjustment

[0217] After determining the set values ​​of the color characteristic parameters for each color in each target characteristic parameter set, the second controller 12 performs linear interpolation on the hue, saturation, and gain values ​​corresponding to the transition colors between red, green, blue, cyan, magenta, yellow, and white to determine the values ​​of the color characteristic parameters corresponding to each color. For example, the linear interpolation can be automatically performed by a built-in program of the second controller 12, or by an external program, and the characteristic parameter set obtained after the interpolation is imported into the second controller 12 for storage, although this disclosure is not limited thereto.

[0218] In some embodiments, the image mode may include a first image mode and a second image mode. The color gamut corresponding to the first image mode meets the standard color gamut. The color gamut corresponding to the second image mode differs from the standard color gamut. For example, the first image mode includes the first sub-image mode, the second sub-image mode, and the third sub-image mode. The color gamut corresponding to the first sub-image mode meets BT2020, the color gamut corresponding to the second sub-image mode meets DCI-P3, and the color gamut corresponding to the third sub-image mode meets Rec.709. The second image mode may include the fourth sub-image mode and the fifth sub-image mode. The color gamut corresponding to the fourth image mode meets the color gamut preset by the projection device 100, which is larger than the color gamut corresponding to the standard image mode. The color gamut corresponding to the fifth sub-image mode is smaller than the color gamut preset by the projection device 100 and differs from the color gamut corresponding to the first image mode. The color gamut corresponding to the fifth sub-image mode can be customized based on the display effect of the projection device 100 and user preferences.

[0219] FIG. 29 is a diagram comparing image modes and color gamuts according to some embodiments.

[0220] In some embodiments, as shown in FIG29 , each image mode can be named according to the color characteristics of the displayed images of the first sub-image mode, the second sub-image mode, the third sub-image mode, the fourth sub-image mode, and the fifth sub-image mode. For example, the first sub-image mode is defined as the AI ​​mode, the second sub-image mode is defined as the standard mode, and the third sub-image mode is defined as the soft mode; the fourth sub-image mode with a larger color gamut is defined as the vivid mode, and the fifth sub-image mode is defined as the custom mode. In this case, the user can intuitively distinguish the differences between the various image modes and select the required image mode for image display. Of course, in some embodiments, fewer or more types and quantities of image modes can be determined based on the classification standards and user needs, and this disclosure is not limited to this.

[0221] Through the projection display method of some embodiments of the present disclosure, when the first controller 11 only has a simple color gamut conversion function or does not have a color gamut conversion function, conversion of multiple color gamuts can be achieved.

[0222] Some embodiments of the present disclosure further provide a projection device, which has a similar structure to the projection device 100 . For example, the projection device includes the light valve 250 , a first controller 11 , and a second controller 12 .

[0223] In some embodiments, the first controller 11 receives a target instruction. The target instruction is used to instruct the projection device 100 to switch to the corresponding image mode for image display. The first controller 11 sends target notification information to the second controller 12 based on the received target instruction. The target notification information is used to characterize the currently switched image mode, and one image mode corresponds to one color gamut; the second controller pre-stores multiple target feature parameter sets. One target feature parameter set corresponds to one image mode; the target feature parameter set includes multiple color feature parameters that meet the corresponding color gamut. The second controller 12 calls the target feature parameter set corresponding to the currently switched image mode based on the target notification information, processes the current image data into a drive signal, and drives the light valve 250 according to the drive signal to display the image.

[0224] In some embodiments, the target feature parameter set includes color feature parameters of multiple colors, each of which includes at least hue, saturation, and gain; the multiple colors include at least red, green, blue, cyan, magenta, yellow, and white. In some embodiments, the second controller 12 determines initial values ​​of hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white, respectively; adjusts the values ​​of hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white in sequence within a set interval based on the color gamut corresponding to the target feature parameter set, and determines the values ​​of hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white when the corresponding color gamut is satisfied as the set values ​​of the target feature parameter set; linearly interpolates the values ​​of hue, saturation, and gain corresponding to transition colors between red, green, blue, cyan, magenta, yellow, and white to determine the values ​​of the color feature parameters corresponding to each color.

[0225] In some embodiments, the image mode includes a standard image mode and a non-standard image mode; the color gamut corresponding to the standard image mode satisfies the standard color gamut; and the color gamut corresponding to the non-standard image mode is different from the standard color gamut.

[0226] The standard image mode includes a first image mode, a second image mode, and a third image mode. The color gamut corresponding to the first image mode meets BT2020. The color gamut corresponding to the second image mode meets DCI-P3; the color gamut corresponding to the third image mode meets Rec.709. The non-standard image mode includes a fourth image mode and a fifth image mode. The color gamut corresponding to the fourth image mode meets the color gamut range preset by the projection device, and the color gamut range preset by the projection device is larger than the color gamut corresponding to the standard image mode; the color gamut corresponding to the fifth image mode is smaller than the color gamut preset by the projection device, and the color gamut corresponding to the fifth image mode is different from the color gamut corresponding to the standard image mode.

[0227] In some embodiments, the first controller 11 also receives image data, decodes the image data, and transmits it to the second controller 12. In some embodiments, the second controller 12 invokes the target feature parameter set corresponding to the currently switched image mode based on the target notification information and interprets the received image data into a drive signal. The second controller 12 drives the light valve 250 to display the image based on the drive signal.

[0228] In some embodiments, the first controller 11 receives the target instruction sent by the user through an external device, or the first controller receives the image mode selected by the user in a menu interface.

[0229] Some embodiments of the present disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) having computer program instructions stored therein. When the computer program instructions are executed on a computer, the computer executes the projection display method described in any of the above embodiments. For example, the computer-readable storage medium may include, but is not limited to: a magnetic storage device (e.g., a hard disk, a floppy disk, or a magnetic tape), an optical disk (e.g., a CD (Compact Disk), a DVD (Digital Versatile Disk), etc.), a smart card, and a flash memory device (e.g., an EPROM (Erasable Programmable Read-Only Memory), a card, a stick, or a key drive, etc.). The various computer-readable storage media described in the present disclosure may represent one or more devices and / or other machine-readable storage media for storing information. The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0230] Some embodiments of the present disclosure further provide a computer program product, which includes computer program instructions. When the computer program instructions are executed on a computer, the computer program instructions cause the computer to execute the projection display method described in the above embodiments.

[0231] Some embodiments of the present disclosure further provide a computer program. When the computer program is executed on a computer, the computer program enables the computer to perform the projection display method described in the above embodiments.

[0232] The beneficial effects of the above-mentioned computer-readable storage medium, computer program product and computer program are the same as the beneficial effects of the projection display method described in some of the above-mentioned embodiments, and will not be repeated here.

[0233] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0234] Those skilled in the art will understand that the scope of the present invention is not limited to the above specific embodiments, and that certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims

1. A projection device, comprising: light valve; a first controller; a second controller electrically connected to the first controller and the light valve, the second controller being configured to drive the light valve to display an image; An imaging device electrically connected to the first controller; as well as a detection device, electrically connected to the first controller, the detection device being configured to detect a current brightness of ambient light; Wherein, the first controller is configured as: After receiving a first instruction, controlling the camera to turn on, and controlling the detection device to detect the current brightness of the ambient light; the first instruction instructs the first controller to control the camera to turn on; Determining a target camera image mode according to a correspondence between brightness and camera image modes; the target camera image mode is a camera image mode corresponding to the current brightness, the camera image mode is an image mode that displays image data captured by the camera device, and the projection device has multiple camera image modes, each of the multiple camera image modes corresponding to a color gamut; sending a first notification message to the second controller according to the target camera image mode; the first notification message indicates the determined target camera image mode; The second controller is further configured to: According to the first notification information, the first characteristic parameter set corresponding to the target camera image mode is called, the image data collected by the camera device is processed, and the light valve is driven to display the image; the second controller pre-stores multiple first characteristic parameter sets, one of the multiple first characteristic parameter sets corresponds to one of the multiple camera image modes, the first characteristic parameter set includes multiple color characteristic parameters, and the color characteristic parameters are within the color gamut of the corresponding image mode.

2. The projection device according to claim 1, wherein: The plurality of camera image modes include a first camera image mode and a second camera image mode; and the first controller is further configured to: If the current brightness is greater than or equal to a preset brightness threshold, determining that the target camera image mode is the first camera image mode; as well as If the current brightness is less than the preset brightness threshold, it is determined that the target camera image mode is the second camera image mode.

3. The projection device according to claim 2, wherein: The plurality of color characteristic parameters of the first characteristic parameter set correspond to a plurality of colors respectively, and the color characteristic parameters include at least hue, saturation and gain; The plurality of colors include at least red, green, blue, cyan, magenta, yellow and white.

4. The projection device according to claim 3, wherein: The gain of red in the first characteristic parameter set corresponding to the first camera image mode is greater than the gain of red in the first characteristic parameter set corresponding to the second camera image mode; The gain of green in the first characteristic parameter set corresponding to the first camera image mode is smaller than the gain of green in the first characteristic parameter set corresponding to the second camera image mode; The gain of blue in the first characteristic parameter set corresponding to the first camera image mode is smaller than the gain of blue in the first characteristic parameter set corresponding to the second camera image mode.

5. The projection device according to claim 3, wherein: The second controller is further configured to: Determine the initial values ​​of hue, saturation, and gain for red, green, blue, cyan, magenta, yellow, and white; If the current brightness is greater than or equal to the preset brightness threshold, the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white are adjusted in sequence within the set adjustment range, and the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that meet the color gamut corresponding to the first camera image mode are determined as the set values ​​of the first feature parameter set corresponding to the first camera image mode; the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white are determined by linear interpolation. and the degree and gain to determine the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the first camera image mode; If the current brightness is less than the preset brightness threshold, the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white are adjusted in sequence within the set adjustment range, and the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that satisfy the color gamut corresponding to the second camera image mode are determined as the set values ​​of the first characteristic parameter set corresponding to the second camera image mode; the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white are determined by the linear interpolation to determine the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the second camera image mode.

6. The projection device according to any one of claims 1 to 5, wherein: The image data further includes at least one of the first data or the second data, The first controller is configured to: After receiving a second instruction, controlling the imaging device to turn off; the second instruction instructs the imaging device to turn off; If the currently input image data is the first data, performing color gamut conversion on the first data according to the color gamut currently set by the projection device, and sending the first data after the color gamut conversion to the second controller; as well as If the currently input image data is the second data, sending a second notification message to the second controller; the second notification message indicates that the currently input image data is the second data; The second controller is further configured to: processing the received first data into a driving signal, and driving the light valve according to the driving signal to display a first image; and In response to the second notification information, a second characteristic parameter set is called to process the second data, and the light valve is driven to display a second image; the second characteristic parameter set is also pre-stored in the second controller, and the second characteristic parameter set includes multiple color characteristic parameters, and the multiple color characteristic parameters are within the color gamut for displaying the second image.

7. A projection display method, applied to a projection device, the projection device comprising a light valve, a first controller, a second controller, an imaging device, and a detection device; the second controller being electrically connected to the first controller and the light valve and configured to drive the light valve to display an image; and the imaging device being electrically connected to the first controller. The detection device is electrically connected to the first controller and is configured to detect the current brightness of the ambient light; the method includes: The first controller receives a first instruction, controls the camera to turn on, and controls the detection device to detect the current brightness of the ambient light; the first instruction instructs the first controller to control the camera to turn on; The first controller determines a target camera image mode based on a correspondence between brightness and camera image modes; the target camera image mode is a camera image mode corresponding to the current brightness, the camera image mode is an image mode that displays image data captured by the camera device, and the projection device has multiple camera image modes, each of the multiple camera image modes corresponds to a color gamut; The first controller sends a first notification message to the second controller according to the target camera image mode; the first notification message indicates the determined target camera image mode; The second controller calls the first characteristic parameter set corresponding to the target camera image mode according to the first notification information, parses the image data collected by the camera device, and drives the light valve to display the image; the second controller pre-stores multiple first characteristic parameter sets, one of the multiple first characteristic parameter sets corresponds to one of the multiple camera image modes, the first characteristic parameter set includes multiple color characteristic parameters, and the color characteristic parameters are within the color gamut of the corresponding image mode.

8. The projection display method according to claim 7, wherein: The plurality of camera image modes include a first camera image mode and a second camera image mode; The first controller determines the target camera image mode according to a correspondence between brightness and camera image modes, including: If the current brightness is greater than or equal to a preset brightness threshold, the first controller determines that the target camera image mode is the first camera image mode; as well as If the current brightness is less than the preset brightness threshold, the first controller determines that the target camera image mode is the second camera image mode.

9. The projection display method according to claim 8, wherein: The plurality of color characteristic parameters of the first characteristic parameter set correspond to a plurality of colors respectively, and the color characteristic parameters include at least hue, saturation and gain; The plurality of colors include at least red, green, blue, cyan, magenta, yellow and white.

10. The projection display method according to claim 8, further comprising: Determine the initial values ​​of hue, saturation, and gain for red, green, blue, cyan, magenta, yellow, and white; If the current brightness is greater than or equal to the preset brightness threshold, the hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white, respectively, are adjusted in sequence within the set adjustment range, and the hue, saturation, and gain corresponding to red, green, blue, cyan, magenta, yellow, and white that satisfy the color gamut corresponding to the first camera image mode are determined as set values ​​of the first characteristic parameter set corresponding to the first camera image mode; the hue, saturation, and gain corresponding to transition colors between red, green, blue, cyan, magenta, yellow, and white are determined by linear interpolation to determine color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the first camera image mode; If the current brightness is less than the preset brightness threshold, the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white are adjusted in sequence within the set adjustment range, and the values ​​of the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that satisfy the color gamut corresponding to the second camera image mode are determined as the set values ​​of the first characteristic parameter set corresponding to the second camera image mode; the hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white are determined by linear interpolation to determine the color characteristic parameters corresponding to each color in the first characteristic parameter set corresponding to the second camera image mode.

11. A projection device comprising: light valve; a first controller; as well as a second controller electrically connected to the first controller and the light valve, the second controller being configured to drive the light valve to display an image; Wherein, the first controller is configured as: receiving a target instruction instructing to switch an image mode; Sending target notification information to the second controller according to the received target instruction; the target notification information indicates the currently switched image mode, the projection device has multiple image modes, and each of the multiple image modes corresponds to a color gamut; The second controller is further configured to: According to the target notification information, the target feature parameter set corresponding to the currently switched image mode is called to process the current image data, and the light valve is driven to display the image; the second controller pre-stores multiple target feature parameter sets; one of the multiple target feature parameter sets corresponds to one of the multiple image modes; the target feature parameter set includes multiple color feature parameters, and the multiple color feature parameters are within the color gamut of the corresponding image mode.

12. The projection device according to claim 11, wherein: The plurality of color characteristic parameters of the target characteristic parameter set correspond to a plurality of colors respectively, and the color characteristic parameters include at least hue, saturation and gain; The plurality of colors include at least red, green, blue, cyan, magenta, yellow and white.

13. The projection device according to claim 11 or 12, wherein: The second controller is further configured to: Determine the initial values ​​of hue, saturation, and gain for red, green, blue, cyan, magenta, yellow, and white; According to the color gamut corresponding to the target characteristic parameter set, the hue, saturation and gain of red, green, blue, cyan, magenta, yellow and white are adjusted in sequence within the set interval to meet the red, green, blue, cyan, magenta, yellow and white color gamut. The hue, saturation and gain corresponding to blue, cyan, magenta, yellow and white are determined as the set values ​​of the target feature parameter set; The hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white are determined by linear interpolation to determine the color characteristic parameters corresponding to each color.

14. The projection device according to any one of claims 11 to 13, wherein: The first controller satisfies one of the following conditions: The first controller is configured to: receiving the target instruction sent by an external device; and Receive the image mode selected in the menu interface.

15. The projection device according to any one of claims 11 to 14, wherein: The first controller satisfies one of the following conditions: The first controller is further configured to: receive first data, decode the first data, and send the decoded first data to the second controller; as well as receiving second data, and sending the second data to the second controller; After receiving the target notification information, the second controller is configured to: calling the target feature parameter set corresponding to the currently switched image mode according to the target notification information, and processing the image data received by the second controller into a driving signal according to the target feature parameter set; The light valve is driven according to the driving signal to display an image.

16. The projection device according to any one of claims 11 to 15, wherein: The image mode includes a first image mode and a second image mode; the color gamut corresponding to the first image mode satisfies the standard color gamut; The color gamut corresponding to the second image mode is different from the standard color gamut; The first image mode includes a first sub-image mode, a second sub-image mode, and a third sub-image mode; the color gamut corresponding to the first sub-image mode meets the BT2020 color standard; the color gamut corresponding to the second sub-image mode meets the DCI-P3 color standard; and the color gamut corresponding to the third sub-image mode meets the Rec.709 color standard. The second image mode includes a fourth sub-image mode and a fifth sub-image mode; the color gamut corresponding to the fourth sub-image mode satisfies a preset color gamut range of the projection device, and the preset color gamut range of the projection device is larger than the color gamut corresponding to the first image mode; The color gamut corresponding to the fifth sub-image mode is smaller than the color gamut preset by the projection device, and the color gamut corresponding to the fifth sub-image mode is different from the color gamut corresponding to the first image mode.

17. A projection display method, applied to a projection device, wherein the projection device comprises a first controller, a second controller, and a light valve; The first controller is electrically connected to the second controller, and the second controller is electrically connected to the light valve and configured to drive the light valve to display an image. The method includes: The first controller receives a target instruction; the target instruction instructs switching to a corresponding image mode for image display; The first controller sends target notification information to the second controller according to the received target instruction; the target notification information indicates the currently switched image mode, the projection device has multiple image modes, and one of the multiple image modes corresponds to a color gamut; the second controller pre-stores multiple target feature parameter sets; one of the multiple target feature parameter sets corresponds to one of the multiple image modes; the target feature parameter set includes multiple color feature parameters, and the color feature parameters are located within the corresponding color gamut; The second controller calls the target feature parameter set corresponding to the currently switched image mode according to the target notification information to process the current image data, and drives the light valve to display the image.

18. The projection display method according to claim 17, wherein: The plurality of color characteristic parameters of the target characteristic parameter set correspond to a plurality of colors respectively, and the color characteristic parameters include at least hue, saturation and gain; The plurality of colors include at least red, green, blue, cyan, magenta, yellow and white.

19. The projection display method according to claim 17 or 18, further comprising: Determine the initial values ​​of hue, saturation, and gain for red, green, blue, cyan, magenta, yellow, and white; According to the color domain corresponding to the target characteristic parameter set, the red, green, blue, the hue, saturation and gain corresponding to cyan, magenta, yellow and white, and determining the hue, saturation and gain corresponding to red, green, blue, cyan, magenta, yellow and white that satisfy the corresponding color gamut as the set values ​​of the target feature parameter set; and The hue, saturation and gain corresponding to the transition colors between red, green, blue, cyan, magenta, yellow and white are determined by linear interpolation to determine the color characteristic parameters corresponding to each color.

20. A computer-readable storage medium storing computer program instructions, wherein when the computer program instructions are executed by a computer, the computer executes one or more steps of the projection display method according to any one of claims 7 to 10 or claims 17 to 19.

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