CN114866752A - Laser projection display method, three-color laser projection equipment and readable storage medium - Google Patents

Abstract

The invention discloses a laser projection display method, three-color laser projection equipment and a readable storage medium, wherein the three-color laser projection equipment comprises a main controller, a display controller and a light valve modulation component; the main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component to display images; the laser projection display method comprises the following steps: the main controller receives the image data, and sends a notification message to the display controller when the menu data is identified in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion; the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image; the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment. The method for displaying the menu image effectively solves the problem of unnatural colors when the menu image is displayed by directly adopting the color gamut of the three-color laser projection equipment.

Description

Laser projection display method, three-color laser projection equipment and readable storage medium

Technical Field

The invention relates to the technical field of laser projection display, in particular to a laser projection display method, three-color laser projection equipment and a readable storage medium.

Background

Three-colour laser projection equipment adopts red, green, blue three-colour laser as the light source to carry out image display, and laser source's monochromaticity is good, and color purity is high, realizes image display through three-colour laser, can obtain great colour gamut scope, compares in traditional TV and has better color expressive force.

When the three-color laser projection device displays an image, color gamut conversion is required for the content displayed by the image, so that the color gamut range is matched with the range of the image color. At present, the color gamut conversion function of the three-color laser projection device is realized through a main controller, conversion is mainly performed on multimedia video signals, and color gamut conversion is not performed in some non-multimedia video display scenes, so that the colors of displayed images are unnatural, and the display effect is influenced.

Disclosure of Invention

In a first aspect of the embodiments of the present invention, a laser projection display method is provided, which is applied to a three-color laser projection device, where the three-color laser projection device includes: a main controller, a display controller and a light valve modulation unit. The main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component to display images; the laser projection display method comprises the following steps:

the main controller receives image data;

the main controller sends a notification message to the display drive controller when the menu data is identified in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion;

the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image;

the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

When the menu image is displayed by adopting the method, the display color gamut is automatically converted into the first color gamut, so that the color of the menu image displayed by adopting the first color gamut is closer to the color of the standard color gamut or the color which is more comfortable for human eyes, and the problem of unnatural color when the menu image is displayed by directly adopting the color gamut of the three-color laser projection equipment is effectively solved.

In some embodiments of the present invention, the notification message includes a first gamut conversion instruction; the first color gamut conversion instruction is used for instructing the display controller to convert the color gamut range of the display image into a first color gamut range; the display controller responds to the color gamut conversion instruction, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images.

In some embodiments of the invention, the notification message comprises an image data type message; the image data type message is used for indicating that the currently processed image data is menu data; and the display controller determines the current image data as menu data according to the image data type message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the image.

In some embodiments of the invention, the master controller receives and decodes the image data; when the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller.

In some embodiments of the present invention, the display controller analyzes the received image data into three primary color driving signals using a preset first color gamut range in response to the notification message; the display controller drives the light valve modulation component to display images according to the three primary color driving signals.

In some embodiments of the present invention, the main controller sends the decoded image data to the display controller when determining that the received image data is multimedia data; the display controller analyzes the received image data into three primary color driving signals; the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

In some embodiments of the present invention, in the process of displaying the menu image, the main controller determines the switched image mode when receiving an image mode switching instruction sent by a user through the external device; when the main controller determines that the switched image mode is the first image mode, the main controller sends a first color gamut conversion instruction to the display controller; the first gamut conversion instruction is used for instructing the display controller to convert the gamut of the display image into a first gamut range; the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a first color gamut range, and drives the light valve modulation component to display menu images;

when the main controller determines that the switched image mode is the second image mode, the main controller sends a second color gamut conversion instruction to the display controller; the second gamut conversion instructions are for instructing the display controller to convert the gamut of the display image to a second gamut range; the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting a second color domain range, and drives the light valve modulation component to display the menu image;

the color gamut range corresponding to the first image mode is a first color gamut range, the color gamut range corresponding to the second image mode is a second color gamut range, the first color gamut range is smaller than the second color gamut range, and the second color gamut range is a color gamut range preset by the three-color laser projection device.

In the process of displaying the menu image, the user selects the image mode for displaying the menu image through the external equipment by adopting the method according to personal preference, so that the three-color laser projection equipment is more flexible and diversified to use, and different use requirements of the user are met.

In some embodiments of the invention, the first gamut range satisfies any one of Rec.709 and DCI-P3, and the second gamut range satisfies BT 2020.

In a second aspect of the embodiments of the present invention, there is provided a three-color laser projection apparatus, including: the device comprises a main controller, a display controller and a light valve modulation component; the main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component;

the main controller is used for receiving image data; transmitting a notification message to the display driving controller when the menu data is recognized in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion;

the display driving controller is used for responding the notification message, analyzing the image data by adopting a preset first color gamut range, and driving the light valve modulation component to display the menu image;

the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

Above-mentioned three-colour laser projection equipment can be when showing menu image automatically with showing gamut conversion to first gamut, make the color of the menu image that adopts first gamut to show more approach the color of standard gamut or the more comfortable color of people's eye sensation, improved the unnatural problem of color when directly adopting the gamut display menu image of three-colour laser projection equipment itself effectively.

In a third aspect of the embodiments of the present invention, a readable storage medium is provided, where executable instructions of a three-color laser projection device are stored in the readable storage medium, and the executable instructions of the three-color laser projection system are used to enable the three-color laser projection device to execute any one of the laser projection display methods described above.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a projection system according to the present invention;

FIG. 2 is a color coordinate diagram of a three-color laser projection apparatus according to the present invention;

FIG. 3 is a schematic structural diagram of a three-color laser projection apparatus according to the present invention;

FIG. 4 is a schematic diagram of a menu interface according to an embodiment of the present invention;

FIG. 5 is a second schematic diagram of a menu interface provided in the embodiment of the present invention;

FIG. 6 is a flowchart of a laser projection display method according to an embodiment of the present invention;

FIG. 7 is a second flowchart of a laser projection display method according to an embodiment of the present invention;

fig. 8 is a third flowchart of a laser projection display method according to an embodiment of the present invention;

FIG. 9 is a fourth flowchart of a laser projection display method according to an embodiment of the present invention;

FIG. 10 is a fifth flowchart of a laser projection display method according to an embodiment of the present invention;

FIG. 11 is a sixth flowchart of a laser projection display method according to an embodiment of the present invention;

fig. 12 is a schematic diagram of keys of a remote control device according to an embodiment of the present invention;

fig. 13 is a flowchart of a color gamut conversion process when multimedia data and menu data are switched with each other according to an embodiment of the present invention;

fig. 14 is a seventh flowchart of a laser projection display method according to an embodiment of the present invention.

The system comprises a projection device 1, a projection screen 2, a main controller 11, a display controller 12, a light valve modulation component 13, a laser light source 14 and a projection lens 15.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.

Compared with the display of a television display, the projection display is not limited by the size of the display, can realize the display of an oversized screen, creates a good viewing atmosphere, and is widely applied to the fields of movie and television entertainment, education and teaching and the like at present.

Fig. 1 is a schematic structural diagram of a projection system provided by the present invention.

As shown in fig. 1, the projection system includes a projection device 1 and a projection screen 2.

The projection screen 2 is used for receiving the imaging light emitted by the projection device 1 to display an image. In general, the projection screen 2 is a square or rectangular white curtain, but is not limited thereto, and may be a white wall when applied to a home theater or a general conference projection; when the display screen is applied to head-up display of an automobile, the display screen can also be a front windshield of the automobile; when the display window is applied to exhibition, the display window can be used as a display cabinet, and the like.

The projection device 1 is a host of the projection system, and the projection device 1 and the projection screen 2 are oppositely arranged and have a set distance therebetween, and are used for processing image data and emitting imaging light.

The projection device 1 mainly includes two display modes, one is to use a monochromatic light source to cooperate with a color wheel to perform time-sharing display, and the other is to use a three-color light source to perform three-primary-color display. Due to the persistence of vision of human eyes, the primary colors alternately irradiated on the same pixel position at a high speed are mixed and superimposed to view a color.

The Light source of the projection device 1 may be a Light Emitting Diode (LED), an Electro-Luminescence (EL) device, a laser, or the like. Laser beams emitted by the laser are good in monochromaticity, high in color purity, and high in brightness and directivity, so that the laser is widely applied as a light source of projection equipment at present. The three-color laser projection equipment which adopts the red, green and blue three-color lasers as the light source realizes image display through three-color laser, can obtain a larger color gamut range, and has better color expressive force compared with the traditional television.

In the embodiment of the present invention, the projection apparatus 1 is a three-color laser projection apparatus.

Fig. 2 is a color coordinate diagram of a three-color laser projection apparatus provided by the present invention.

The size of the color gamut that can be displayed when the three-color laser projection device displays an image is related to the wavelengths of the red laser beam, the green laser beam, and the blue laser beam emitted by the red, green, and blue three-color lasers serving as the light source, respectively. The half-peak width of the wavelength of the laser beam emitted by the laser is narrow, the color purity is high, as shown in fig. 2, the color gamut range (the area of the triangle surrounded by the dotted lines corresponding to the three-color laser projection device in fig. 2) which can be reached by the direct image display of the three-color laser beam of the three-color laser projection device at present is already larger than the maximum color gamut (the area of the triangle surrounded by the dotted lines corresponding to the BT2020 standard in the figure) defined by the image signal color gamut standard, so that the image display is performed by adopting the three-color laser projection device, and the viewing requirement of the large color gamut sheet source can be met.

For a three-color laser projection device, multiple image modes can be configured, for example, a standard image mode and a bright-colored image mode can be set, wherein the color gamut range corresponding to the standard image mode is smaller than the color gamut range corresponding to the bright-colored image mode, for example, the color gamut range corresponding to the standard image mode satisfies the standard color gamut range, such as rec.709, DCP-P3, etc.; the color gamut range corresponding to the vivid image mode satisfies a preset color gamut range of the three-color laser projection device, such as the color gamut range of BT2020 or the three-color laser projection device itself. When the three-color laser projection equipment leaves a factory, a standard image mode is defaulted to display a multimedia image, and in the process of displaying the multimedia image, a user can select different image modes according to the preference.

However, for the menu image, since the menu image is a signal generated by the three-color laser projection device itself, the menu image is displayed by default in a color gamut range preset by the three-color laser device, and since the color gamut range preset by the three-color laser projection device is large, colors are unnatural when the menu image is displayed, which affects the display effect.

Fig. 3 is a schematic structural diagram of a three-color laser projection apparatus according to an embodiment of the present invention.

As shown in fig. 3, the three-color laser projection apparatus includes: a main controller 11, a display controller 12, a light valve modulation section 13, a laser light source 14, and a projection lens 15.

The laser light source 14 is configured to emit laser light of different colors at a predetermined timing. The light valve modulation component 13 is located on the light emitting side of the laser light source 14, and is used for modulating and reflecting incident light. The display controller 12 is connected to the light valve modulating section 13, and drives the light valve modulating section to display an image. In the embodiment of the present invention, the light valve modulation component may adopt a Digital Micromirror (DMD), where the DMD includes a plurality of reflective units, and the reflective units are driven by the driving signal to deflect at a high speed to realize the function of optical switch, so as to mix three-color laser light for image display. The projection lens 15 is located on the optical path of the imaging light reflected by the light valve modulating member 13, and is used to image the outgoing light from the light valve modulating member 13. The main controller 11 is connected to the display controller 12 and is arranged to process received image data and to send data and associated instructions to the display controller.

In the process of displaying images, the main controller 11 receives image data and decodes the received image data, and in specific implementation, the main controller 11 may decode the received image data into a Low-Voltage Differential Signaling (LVDS). The main controller 11 sends the decoded image data to the display controller 12, and the display controller 12 receives the decoded image data, analyzes the received image data into three primary color driving signals, and drives the light valve modulation component 13 according to the three primary color driving signals to display an image.

The main controller 11 may be understood as an SOC control chip in the three-color laser projection apparatus, and the display controller 12 may be understood as a control chip for controlling the DMD in the DLP system. Currently, the main controller 11 has a color gamut conversion function, and performs color gamut conversion according to an image mode currently set by the three-color laser projection device after receiving the image data, for example, when the image mode currently set by the three-color laser projection device is a standard image mode, the main controller 11 converts the display color gamut range of the image into a color gamut range satisfying rec.709 or DCP-P3 after receiving the image data.

However, the main controller 11 only performs the color gamut range conversion for the multimedia data, and when the main controller 11 receives the menu data for displaying the menu image, the color gamut conversion cannot be performed, and the menu image is displayed by directly adopting the color gamut range preset by the three-color laser projection device.

FIG. 4 is a schematic diagram of a menu interface according to an embodiment of the present invention; fig. 5 is a second schematic diagram of a menu interface according to an embodiment of the invention.

As shown in fig. 4 and 5, the menu data is data for displaying a menu interface, and the menu interface is generally used for displaying functions such as a system main menu interface, system parameter setting, and user preference setting.

For example, as shown in fig. 4, a menu interface may be used to display setting parameters of the projection device, on which parameter information, factory information, and the like of the projection device are displayed, and a user may perform operations such as size, resolution, brightness, contrast setting of a projection screen, signal source selection, viewing of a system version number, and the like. Alternatively, as shown in fig. 5, the menu interface may also be used as a main menu interface, where information such as a movie program and the like is displayed on the interface, and a user may select a movie or a television that the user wants to watch, or perform an operation such as searching for a movie program that the user wants to watch. The embodiment of the present invention only exemplifies two cases where the three-color laser projection apparatus displays the menu images with fig. 4 and fig. 5, and does not represent that the three-color laser projection apparatus can only display the two menu images.

Because the main controller 11 does not perform color gamut conversion after receiving the menu data, and the menu image generally contains a small number of colors, when the menu image is displayed in a color gamut range preset by the three-color laser projection device, the depth of each color is deep, the stimulation to the vision is large, and especially when the menu image is displayed in a color which is sensitive to the vision such as red, the problem of unnatural display color can occur when the three-color laser projection device displays the menu interface.

In view of this, embodiments of the present invention provide a laser projection display method, which can improve the problem of unnatural display colors when a three-color laser projection device displays a menu interface.

Fig. 6 is a flowchart of a laser projection display method according to an embodiment of the present invention.

As shown in fig. 6, a laser projection display method provided in an embodiment of the present invention includes:

s100: the main controller receives image data;

s210: the main controller sends a notification message to the display drive controller when the menu data is identified in the received image data;

s310: the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image.

In the embodiment of the present invention, the main controller is configured to receive image data, where the image data may be image data input through a network, an antenna, a closed-circuit television system, a memory card, and the like, such as multimedia data, and the multimedia data may include HDMI Video data, Video data, and the like. Or the image data may be image data, such as menu data, generated by an image generator internal to the three-color laser projection device. The type of the image data can be identified in the process that the main controller receives the image data, the type of the image data can be identified by the main controller in various modes, specifically, multimedia data and menu data can be input into the main controller through the same interface, the type of the signal is identified through a specific identifier in the image data, or the multimedia data and the menu data are input into the main controller through two different interfaces, the type of the video signal is judged by the main controller according to the interface for inputting the video signal, and other judging modes can be selected according to actual conditions, and the method is not listed one by one.

Since the main controller does not perform the color gamut conversion on the menu data itself, when the main controller recognizes the menu data in the image data, a notification message for instructing the display controller to perform the color gamut conversion is sent to the display controller.

And after receiving the notification message, the display controller responds to the notification message and analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image so as to enable the color gamut of the displayed menu image to meet the first color gamut range.

The process can automatically run when the three-color laser projection equipment displays images, when the main controller identifies menu data, the display controller is immediately informed, and when receiving the image data, the display controller analyzes the image data by adopting a preset first color gamut range and drives the light valve modulation component to display the menu images. The first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

In some embodiments, the first color gamut satisfies rec.709 and DCP-P3, and the color gamut preset by the three-color laser projection device satisfies the color gamut of BT2020 or the color gamut of the three-color laser projection device itself.

In some embodiments, the first color gamut range may be adjusted according to the display performance of the three-color laser projection device, so that the human eyes can feel comfortable and a color gamut with a better display effect is realized.

The first color gamut range is adopted for displaying the menu image, the color of the menu image is closer to the color of the standard color gamut range or the color which is more comfortable for human eyes, and the problem of unnatural color when the menu image is displayed by directly adopting the color gamut preset by the three-color laser projection equipment can be effectively solved.

Fig. 7 is a second flowchart of a laser projection display method according to an embodiment of the present invention.

In the embodiment of the present invention, after the main controller receives the image data, the image data needs to be sent to the display controller to be analyzed into the driving signal for driving the light valve modulation component to display the image. In practical implementation, the display controller cannot directly analyze the image data, and the main controller needs to decode the received image data before sending the decoded image data to the display controller. In specific implementation, as shown in fig. 9, the receiving, by the main controller, the image data specifically includes:

s110: the main controller receives the image data and decodes the image data;

when the main controller recognizes the menu data in the received image data, it sends a notification message to the display controller, including:

s211: when the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller.

Specifically, the main controller decodes the image data into LVDS data after receiving the image data. When the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller. Fig. 8 is a third flowchart of a laser projection display method according to an embodiment of the present invention.

In some embodiments, the notification message includes a first gamut conversion instruction for instructing the display controller to convert the gamut range of the display image to the first gamut range. As shown in fig. 8, the laser projection display method specifically includes:

s212: when the main controller identifies menu data in the received image data, a first color gamut conversion instruction is sent to the display controller;

s311: the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images.

In a specific implementation, when the main controller identifies the menu data in the received image data, the main controller may generate a first color gamut conversion instruction, where the first color gamut conversion instruction is used to instruct the display controller to convert the color gamut range of the display image into the first color gamut range. The main controller transmits the decoded image data and the first color gamut conversion instruction to the display controller. And the display controller analyzes the image data by adopting a preset first color gamut range according to the first color gamut conversion instruction.

Fig. 9 is a fourth flowchart of a laser projection display method according to an embodiment of the present invention.

In some embodiments, the notification message includes an image data type message indicating that the currently processed image data is menu data. As shown in fig. 9, the laser projection display method specifically includes:

s213: when the main controller identifies menu data in the received image data, sending an image data type message to the display controller;

s312: and the display controller determines the current image data as menu data according to the image data type message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the image.

In specific implementation, when the main controller identifies menu data in the received image data, the main controller sends a notification message to the display driving controller, wherein the notification message includes an image data type message, and the image data type message is used for indicating that the currently processed image data is menu data. The main controller transmits the decoded image data and the image data type message to the display controller. The display controller can determine that the current image data is menu data after receiving the image data, automatically analyze the image data by adopting a preset first color gamut range, and drive the light valve modulation component to display the image.

In this embodiment of the present invention, when the main controller identifies the menu data in the received image data, the main controller may generate a first color gamut conversion instruction for directly instructing the display controller to perform color gamut conversion, or send an image data type message to the display controller, and the display controller determines that the image data is the menu data and then automatically performs color gamut conversion, which is not limited herein.

Fig. 10 is a fifth flowchart of a laser projection display method according to an embodiment of the present invention.

In this embodiment of the present invention, as shown in fig. 10, the analyzing, by the display controller, the image data by using a preset first color gamut range in response to the notification message, and driving the light valve modulating component to display the menu image specifically includes:

s313: the display controller responds to the notification message and analyzes the received image data into three primary color driving signals by adopting a preset first color gamut range;

s314: the display controller drives the light valve modulation component to display images according to the three primary color driving signals.

In specific implementation, after receiving the image data decoded by the main controller, the display controller needs to analyze the received image data into a driving signal for driving the light valve modulation component to display an image.

Specifically, when the main controller identifies menu data in the received image data, the image data is decoded, and the decoded image data and the notification message are sent to the display controller, the display controller receives the decoded image data and the notification message, analyzes the received image data into three primary color driving signals by using a preset first color gamut range in response to the notification message, and drives the light valve modulation component to display an image according to the three primary color driving signals. The display controller drives the light valve modulation component according to the three-primary-color driving signal obtained by analyzing the image data by adopting the preset first color gamut range, so that the color gamut range of the display menu image can meet the first color gamut range.

In an actual implementation process, first color gamut range information matched with the first color gamut range and a preset image data analysis rule are stored in the display controller in advance, wherein the first color gamut range information and the image data analysis rule can be written into the display controller in advance in a coding manner. After receiving the notification message, the display controller directly analyzes the received image data into three primary color driving signals according to the pre-stored first color gamut information matched with the first color gamut range and the pre-set image data analysis rule.

In some embodiments, the first color gamut range information includes three color coordinate point values of red, green, and blue of the first color gamut range, and in specific implementation, after receiving the notification message, the display controller analyzes the image data according to the three color coordinate point values of the first color gamut range, which are stored in advance, and the mapping relationship between the first color gamut range and the color gamut range preset by the three-color laser projection device, so that the color gamut of the display controller when the display controller drives the light valve modulation component to display the menu image according to the three primary color driving signals obtained by the analysis meets the first color gamut range, and the problem of unnatural color when the menu image is displayed is solved.

Fig. 11 is a sixth flowchart of a laser projection display method according to an embodiment of the present invention.

In the embodiment of the present invention, as shown in fig. 11, the laser projection display method further includes:

s220: when the main controller determines that the received image data is multimedia data, the main controller sends the decoded image data to the display controller;

s321: the display controller analyzes the received image data into three primary color driving signals;

s322: the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

In particular, the main controller receives image data and decodes the image data. When the main controller determines that the received image data is multimedia data, the main controller performs color gamut conversion already in the process of decoding the image signal, and does not need the display controller to perform color gamut conversion again. The main controller sends the decoded image data to the display controller, the display controller directly analyzes the received image data into three-primary-color driving signals, and drives the light valve modulation component to display the multimedia image according to the three-primary-color driving signals, so that the color gamut for displaying the multimedia image meets the color gamut range corresponding to the image mode set by the current three-color laser projection equipment.

In the embodiment of the invention, the laser projection display method can be applied to the starting process of the three-color laser projection equipment and the switching process of the menu image and the multimedia image. By adopting the laser projection display method, the three-color laser projection equipment can automatically perform color gamut conversion according to the type of the identified image data in the starting process of the three-color laser projection equipment or the switching process of the menu image and the multimedia image, so that the display effect is optimized.

In order to make the above laser projection display method clearer, a case when the three-color laser projection apparatus switches between the menu image and the multimedia image is exemplified below.

Fig. 12 is a schematic diagram of keys of a remote control device according to an embodiment of the present invention.

As shown in fig. 12, in some embodiments, the keys of the remote control device include a "main menu" key and a "confirm full screen" key, where when the "main menu" key is pressed while watching the multimedia video, the remote control device may send a command to the three-color laser projection device to control the three-color laser projection device to exit from the display of the multimedia video, and a main menu interface is displayed in a full screen mode, where the image data received by the main controller is switched from the multimedia data to the menu data. The main menu interface can display related information as shown in fig. 5, information such as movie programs and the like can be displayed on the interface, and a user can select movie programs such as movies, television shows and the like to be watched through the up, down, left and right keys on the remote control device. The user confirms the video program which is wanted to be watched by pressing a 'confirm full screen' button on the equipment, at the moment, the remote control equipment sends an instruction to the three-color laser projection equipment to control the three-color laser projection equipment to exit from a main menu interface, a multimedia video playing interface is displayed in a full screen mode, the user can watch the multimedia video under the interface, and at the moment, the image data received by the main controller is switched into the multimedia data from menu data. Here, the names and functions of the keys of the remote control device are only exemplarily described, and the functions of the three-color laser projection device and the functions of the keys of the remote control device are not limited.

Fig. 13 is a flowchart of a color gamut conversion process when multimedia data and menu data are switched with each other according to an embodiment of the present invention.

As shown in fig. 13, in the process of displaying an image by the three-color laser projection apparatus, when the three-color laser projection apparatus is controlled by the remote control apparatus to switch between multimedia data and menu data, the three-color laser projection apparatus performs the following steps:

s110: the main controller receives the image data and decodes the image data;

when a 'main menu' key of the remote control device is pressed, the image data is switched from the multimedia data to the menu data, and the following steps are executed:

s211: when the main controller identifies the menu data in the received image data, the main controller sends the decoded image data and the notification message to the display controller;

s313: the display controller responds to the notification message and analyzes the received image data into three primary color driving signals by adopting a preset first color gamut range;

s314: the display controller drives the light valve modulation component to display images according to the three primary color driving signals;

when a 'confirm full screen' key of the remote control device is pressed, the image data is switched from the menu data to the multimedia data, and then the following steps are executed:

s220: when the main controller determines that the received image data is multimedia data, the main controller sends the decoded image data to the display controller;

s321: the display controller analyzes the received image data into three primary color driving signals;

s322: the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

Specifically, during the process of displaying an image by the three-color laser projection apparatus, the main controller receives image data and decodes the image data.

When a user watches a multimedia video, the remote control device sends an instruction to the three-color laser projection device by pressing a 'main menu' key of the remote control device to control the three-color laser projection device to quit displaying the multimedia video and display a main menu interface in a full screen mode, as shown in fig. 5, information such as video programs and the like can be displayed on the interface, and at the moment, image data received by the main controller is switched into menu data from multimedia data. When the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller. The notification message may include, among other things, a gamut conversion instruction or image data type information.

And after receiving the decoded image data and the notification message, the display controller responds to the notification message and analyzes the received image data into the three-primary-color driving signals by adopting the first color gamut according to the prestored first color gamut range information matched with the first color gamut range and the preset image data analysis rule.

And after the analysis is finished, the display controller drives the light valve modulation component to display the menu image according to the three-primary-color driving signal.

On the main interface shown in fig. 5, the user selects a movie program such as a movie or a tv drama to be watched through the "up", "down", "left" and "right" buttons on the remote control device shown in fig. 12. The user confirms the movie program which the user wants to watch by pressing a 'confirm full screen' button on the equipment, at the moment, the remote control equipment sends an instruction to the three-color laser projection equipment to control the three-color laser projection equipment to quit the main menu interface, and the multimedia video playing interface is displayed in full screen. At this time, the image data received by the main controller is switched from the menu data to the multimedia data. When the main controller determines that the received image data is multimedia data, the main controller automatically performs color gamut conversion and sends the decoded image data to the display controller. The display controller directly analyzes the received image data into three primary color driving signals, and drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

The above is merely exemplified by a manner of switching between multimedia data and menu data by transmitting an instruction through a remote control device, and does not mean that switching between multimedia data and menu data can be performed only by this manner. In the embodiment of the present invention, no matter what manner is adopted to switch the multimedia data and the menu data, the laser projection display method provided in the embodiment of the present invention can be executed after the image data is switched, and therefore, the manners of switching the multimedia data and the menu data are not listed one by one.

In the starting process of the three-color laser projection equipment, the three-color laser projection equipment usually directly enters a main menu interface, so that the color gamut conversion function can be automatically operated in the starting process, and the color gamut range of the menu image is more in line with the watching habit of human eyes. And when the user selects the multimedia video to be watched on the main menu interface, the user enters a related process of converting the menu data into the multimedia data, which is not described herein again.

In some embodiments, different image modes may be selected for displaying the menu image according to user preferences, where the different image modes correspond to different color gamut ranges.

Fig. 14 is a seventh flowchart of a laser projection display method according to an embodiment of the present invention.

Specifically, as shown in fig. 14, the laser projection display method provided in the embodiment of the present invention further includes:

s400: in the process of displaying the menu image, when receiving an image mode switching instruction sent by a user through external equipment, the main controller determines the switched image mode; when the image mode is the first image mode, executing the steps S510 to S610; executing steps S520 to S620 when the image mode is the second image mode;

s510: sending a first color gamut conversion instruction to a display controller;

s610: the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a first color gamut range, and drives the light valve modulation component to display menu images;

s520: sending a second color gamut conversion instruction to the display controller;

s620: the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting the second color domain range, and drives the light valve modulation component to display the menu image.

In the process of displaying the menu image, a user can send an image mode switching instruction to the main controller through external equipment such as a remote control device and keys on the three-color laser projection device, and the three-color laser projection device is controlled to display the menu image in the image mode selected by the user.

In specific implementation, the corresponding relationship between the image mode and the color gamut conversion instruction may be established in advance, and the corresponding relationship may be stored in the main controller. When receiving an image mode switching instruction sent by a user through the external device, the main controller determines the switched image mode and can generate a corresponding color gamut conversion instruction according to the pre-stored corresponding relation.

When the main controller determines that the switched image mode is the first image mode, the main controller sends a first color gamut conversion instruction to the display controller, and the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a first color gamut range, and drives the light valve modulation component to display the menu image. The first gamut conversion instruction is used for instructing the display controller to convert the gamut of the display image into a first gamut range.

Specifically, the main controller decodes the menu data after receiving the menu data, and when the main controller determines that the switched image mode is the first image mode, the main controller sends the decoded image data and the first color gamut conversion instruction to the display controller, and the display controller analyzes the received image data into three primary color driving signals according to the pre-stored first color gamut range information matched with the first color gamut range and the pre-set image data, and then the display controller drives the light valve modulation component to display the menu image according to the three primary color driving signals obtained by analysis.

And when the main controller determines that the switched image mode is the second image mode, the main controller sends a second color domain conversion instruction to the display controller, and the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting a second color domain range, and drives the light valve modulation component to display the menu image. Wherein the second gamut conversion instruction is to instruct the display controller to convert the gamut of the display image to a second gamut range.

Specifically, the main controller decodes the menu data after receiving the menu data, and when the main controller determines that the switched image mode is the second image mode, the main controller sends the decoded image data and the second color domain conversion instruction to the display controller, and the display controller responds to the second color domain conversion instruction, analyzes the received image data into three primary color driving signals according to the pre-stored second color domain range information matched with the second color domain range and the pre-set image data, and then drives the light valve modulation component to display the menu image according to the three primary color driving signals obtained by analysis.

The color gamut range corresponding to the first image mode is a first color gamut range, the color gamut range corresponding to the second image mode is a second color gamut range, and the first color gamut range is smaller than the second color gamut range. Since the second color gamut range is larger than the first color gamut range, the menu image displayed using the second color gamut range is brighter than the menu image displayed using the first color gamut range, and thus, the image mode in which the menu image is displayed using the first color gamut range may be defined as a standard image mode, and the image mode in which the menu image is displayed using the second color gamut range may be defined as a bright image mode.

In some embodiments, the second color gamut range may be a color gamut range preset by the three-color laser projection device. Because the tricolor laser projection equipment defaults to display the menu image by adopting the preset color gamut range, when the main controller determines that the color gamut conversion instruction corresponds to the second color gamut, the display controller receives the second color gamut conversion instruction and does not convert the color gamut range for displaying the menu image, and the menu image can be displayed by directly adopting the color gamut range preset by the tricolor laser projection equipment.

In specific implementation, the first color gamut range may satisfy any one of rec.709 and DCP-P3, and the color gamut range preset by the three-color laser projection apparatus may satisfy the color gamut range of the BT2020 or the three-color laser projection apparatus itself.

In order to make the method for displaying a menu image by using a selected color gamut according to the present invention more clear, a scene for displaying a menu image by selecting an image mode through a remote control device is described below.

In some embodiments, as shown in FIG. 12, the remote control device also includes a "vivid mode" key and a "standard mode" key. In the process of displaying the menu image, the 'bright mode' button is pressed to select the three-color laser projection device to display the menu image in the second color gamut range, and the 'standard mode' button is pressed to select the three-color laser projection device to display the menu image in the first color gamut range.

In the process of displaying the menu image, the user selects the image mode for displaying the menu image through the remote control equipment according to personal preference by adopting the method, so that the three-color laser projection equipment is more flexible and diversified to use, and different use requirements of the user are met. Here, the names and functions of the keys of the remote control device are only exemplarily described, and the functions of the three-color laser projection device and the functions of the keys of the remote control device are not limited. In some embodiments, the three-color laser projection apparatus may further include more image modes, which are not limited herein.

Another aspect of the embodiments of the present invention provides a three-color laser projection apparatus, where the structure of the three-color laser projection apparatus can be seen in fig. 3, and the three-color laser projection apparatus specifically includes: a main controller 11, a display controller 12, a light valve modulation section 13, a laser light source 14, and a projection lens 15.

The light valve modulation component 13 is located on the light emitting side of the laser light source 14, and is used for modulating and reflecting the light emitted by the laser light source 14 under the driving of the display controller. The projection lens 15 is located on the optical path of the imaging light reflected by the light valve modulating member 13, and is used to image the outgoing light from the light valve modulating member 13. The main controller 11 is connected to a display controller 12, and the display controller 12 is used to drive the light valve modulating component.

In a specific implementation, the main controller 11 is configured to receive image data, and send a notification message to the display driving controller when menu data is identified in the received image data. The notification message is used to instruct the display controller 12 to perform color gamut conversion.

The display controller 12 is configured to respond to the notification message, analyze the image data using a preset first color gamut, and drive the light valve modulating component 13 to display a menu image; the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

In some embodiments, the master controller is specifically configured to receive image data and decode the image data; when the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller.

In some embodiments, the notification message includes a first gamut conversion instruction; the first gamut conversion instructions are for instructing the display controller to convert a gamut of the display image to a first gamut range. The display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images.

In some embodiments, the notification message comprises an image data type message; the image data type message is used to indicate that the currently processed image data is menu data. And the display controller determines the current image data as menu data according to the image data type message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the image.

In some embodiments, the display controller is specifically configured to parse the received image data into three primary color drive signals using a preset first color gamut range in response to the notification message; the display controller drives the light valve modulation component to display images according to the three primary color driving signals.

In some embodiments, the main controller transmits the decoded image data to the display controller upon determining that the received image data is multimedia data; the display controller analyzes the received image data into three primary color driving signals; and the display controller drives the light valve modulation component to display the multimedia image according to the three-primary-color driving signal.

In some embodiments, in displaying the menu image, the main controller determines the switched image mode upon receiving an image mode switching instruction transmitted from a user through the external device.

When the main controller determines that the switched image mode is the first image mode, the main controller sends a first color gamut conversion instruction to the display controller; the first gamut conversion instruction is used for instructing the display controller to convert the gamut of the display image into a first gamut range; the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting the first color gamut range, and drives the light valve modulation component to display the menu image.

When the main controller determines that the switched image mode is the second image mode, the main controller sends a second color gamut conversion instruction to the display controller; the second gamut conversion instructions are for instructing the display controller to convert the gamut of the display image to a second gamut range; the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting the second color domain range, and drives the light valve modulation component to display the menu image.

The color gamut range corresponding to the first image mode is a first color gamut range, the color gamut range corresponding to the second image mode is a second color gamut range, the first color gamut range is smaller than the second color gamut range, and the second color gamut range is a color gamut range preset by the three-color laser projection device.

In some embodiments, the first gamut range satisfies any one of rec.709 and DCI-P3, and the second gamut range satisfies BT 2020.

The embodiment of the invention also provides a readable storage medium, wherein the readable storage medium stores an executable instruction of the three-color laser projection equipment, and the executable instruction of the three-color laser projection equipment is used for enabling the three-color laser projection equipment to execute any laser projection display method.

According to a first inventive concept, a three-color laser projection apparatus includes: a main controller, a display controller and a light valve modulation unit. The main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component to display images; the laser projection display method comprises the following steps: the main controller receives image data; the main controller sends a notification message to the display drive controller when the menu data is identified in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion; the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image; the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment. When the menu image is displayed by adopting the method, the display color gamut is automatically converted into the first color gamut, so that the color of the menu image displayed by adopting the first color gamut is closer to the color of the standard color gamut or the color which is more comfortable for human eyes, and the problem of unnatural color when the menu image is displayed by directly adopting the color gamut of the three-color laser projection equipment is effectively solved.

According to the second inventive concept, the notification message includes a first color gamut conversion instruction; the first color gamut conversion instruction is used for instructing the display controller to convert the color gamut range of the display image into a first color gamut range; the display controller responds to the color gamut conversion instruction, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images.

According to the third inventive concept, the notification message includes an image data type message; the image data type message is used for indicating that the currently processed image data is menu data; and the display controller determines the current image data as menu data according to the image data type message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the image.

According to the fourth inventive concept, the main controller receives the image data and decodes the image data; when the main controller recognizes the menu data from the received image data, the main controller transmits the decoded image data and the notification message to the display controller.

According to the fifth inventive concept, the display controller parses the received image data into three primary color driving signals using a preset first color gamut range in response to the notification message; and the display controller drives the light valve modulation component to display images according to the three primary color driving signals.

According to the sixth inventive concept, the main controller transmits the decoded image data to the display controller when it is determined that the received image data is multimedia data; the display controller analyzes the received image data into three primary color driving signals; the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

According to the seventh inventive concept, in displaying the menu image, the main controller determines the switched image mode when receiving an image mode switching instruction transmitted from the user through the external device; when the main controller determines that the switched image mode is the first image mode, the main controller sends a first color gamut conversion instruction to the display controller; the first gamut conversion instruction is used for instructing the display controller to convert the gamut of the display image into a first gamut range; the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a first color gamut range, and drives the light valve modulation component to display menu images; when the main controller determines that the switched image mode is the second image mode, the main controller sends a second color gamut conversion instruction to the display controller; the second gamut conversion instructions are for instructing the display controller to convert the gamut of the display image to a second gamut range; the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting a second color domain range, and drives the light valve modulation component to display the menu image; the color gamut range corresponding to the first image mode is a first color gamut range, the color gamut range corresponding to the second image mode is a second color gamut range, the first color gamut range is smaller than the second color gamut range, and the second color gamut range is a color gamut range preset by the three-color laser projection device. In the process of displaying the menu image, the user selects the image mode for displaying the menu image through the external equipment by adopting the method according to personal preference, so that the three-color laser projection equipment is more flexible and diversified to use, and different use requirements of the user are met.

According to the eighth inventive concept, the first gamut satisfies any one of rec.709 and DCI-P3, and the second gamut satisfies BT 2020.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. A laser projection display method is characterized in that the method is applied to three-color laser projection equipment, and the three-color laser projection equipment comprises a main controller, a display controller and a light valve modulation component; the main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component to display images; the method comprises the following steps:

the main controller receives image data;

the main controller sends a notification message to the display controller when the menu data is identified in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion;

the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images;

the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

2. The method of claim 1, wherein the notification message includes a first gamut conversion instruction; the first gamut conversion instruction is used for instructing the display controller to convert a gamut range of a display image into a first gamut range;

the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image, and the method comprises the following steps:

and the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images.

3. The method of claim 1, wherein the notification message comprises an image data type message; the image data type message is used for indicating that the currently processed image data is menu data;

the display controller responds to the notification message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images, and the method comprises the following steps:

and the display controller determines the current image data as menu data according to the image data type message, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the image.

4. The method of any of claims 1 to 3, wherein the master controller receives image data comprising:

the main controller receives image data and decodes the image data;

when the main controller identifies the menu data in the received image data, sending a notification message to the display controller, wherein the notification message comprises:

and when the main controller identifies the menu data in the received image data, the main controller sends the decoded image data and the notification message to the display controller.

5. The method of claim 4, wherein the display controller, in response to the notification message, parses image data using a preset first color gamut range and drives the light valve modulating component for menu image display, comprising:

the display controller responds to the notification message and analyzes the received image data into three primary color driving signals by adopting a preset first color gamut range;

and the display controller drives the light valve modulation component to display images according to the three primary color driving signals.

6. The method of claim 4, further comprising:

when the main controller determines that the received image data is multimedia data, the main controller sends the decoded image data to the display controller;

the display controller analyzes the received image data into three primary color driving signals;

and the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.

7. The method of any one of claims 1 to 3, further comprising:

in the process of displaying the menu image, when receiving an image mode switching instruction sent by a user through external equipment, the main controller determines the switched image mode;

the main controller sends a first color gamut conversion instruction to the display controller when determining that the switched image mode is a first image mode; the first gamut conversion instructions are to instruct the display controller to convert a gamut of a display image to a first gamut range;

the display controller responds to the first color gamut conversion instruction, analyzes the image data by adopting a first color gamut range, and drives the light valve modulation component to display menu images;

the main controller sends a second color gamut conversion instruction to the display controller when determining that the switched image mode is a second image mode; the second gamut conversion instructions are to instruct the display controller to convert a gamut of a display image to a second gamut range;

the display controller responds to the second color domain conversion instruction, analyzes the image data by adopting a second color domain range, and drives the light valve modulation component to display menu images;

the color gamut range corresponding to the first image mode is the first color gamut range, the color gamut range corresponding to the second image mode is the second color gamut range, the first color gamut range is smaller than the second color gamut range, and the second color gamut range is the color gamut range preset by the three-color laser projection device.

8. The method of claim 7, wherein the first gamut range satisfies any one of Rec.709 and DCI-P3, and the second gamut range satisfies BT 2020.

9. A three-color laser projection apparatus, comprising: a main controller, a display controller, and a light valve modulating section; the main controller is connected with the display controller, and the display controller is used for driving the light valve modulation component;

the main controller is used for receiving image data; transmitting a notification message to the display controller when menu data is recognized in the received image data; the notification message is used for instructing the display controller to perform color gamut conversion;

the display controller is used for responding to the notification message, analyzing the image data by adopting a preset first color gamut range, and driving the light valve modulation component to display menu images;

the first color gamut range is smaller than a color gamut range preset by the three-color laser projection equipment.

10. A readable storage medium storing executable instructions of a tri-color laser projection device, the executable instructions of the tri-color laser projection device being configured to cause the tri-color laser projection device to perform the laser projection display method of any one of claims 1 to 8.

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