CN114866752B - Laser projection display method, three-color laser projection apparatus, and readable storage medium - Google Patents
Laser projection display method, three-color laser projection apparatus, and readable storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3179—Video signal processing therefor
- H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
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Abstract
The invention discloses a laser projection display method, a three-color laser projection device and a readable storage medium, wherein the three-color laser projection 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 to display images; the laser projection display method comprises the following steps: the main controller receives the image data, and when the menu data is identified in the received image data, a notification message is sent to the display controller; the notification message is used for indicating 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 device. The method for displaying the menu image effectively solves the problem that the color is unnatural when the menu image is displayed by directly adopting the color gamut of the three-color laser projection equipment.
Description
Technical Field
The present invention relates to the field of laser projection display technologies, and in particular, to a laser projection display method, a three-color laser projection device, and a readable storage medium.
Background
The three-color laser projection equipment adopts red, green and blue laser as light sources for image display, the laser light sources have good monochromaticity and high color purity, and the three-color laser can realize image display, so that a larger color gamut range can be obtained, and the three-color laser projection equipment has better color expressive force compared with the traditional television.
When an image is displayed, a three-color laser projection device needs to perform color gamut conversion for the content of the image display so that the color gamut range matches the range of the image colors. At present, the color gamut conversion function of the three-color laser projection equipment is realized through the main controller, and is mainly aimed at converting multimedia video signals, and the color gamut conversion is not performed in some non-multimedia video display scenes, so that the color of a display image is unnatural, and the display effect is affected.
Disclosure of Invention
In a first aspect of an embodiment of the present invention, there is provided a laser projection display method applied to a three-color laser projection apparatus, the three-color laser projection apparatus including: 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;
when the main controller identifies menu data in the received image data, a notification message is sent to the display driving controller; the notification message is used for indicating 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 device.
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 more similar to the color of the standard color gamut or the color which is more comfortable to 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 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; the display controller determines the current image data as menu data according to the image data type information, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display images.
In some embodiments of the present invention, a main controller receives image data and decodes the image data; and when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller.
In some embodiments of the present invention, the display controller uses a preset first color gamut range to parse the received image data into three primary color driving signals 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, when the main controller determines that the received image data is multimedia data, the main controller transmits the decoded image data to the display controller; 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 a menu image, when receiving an image mode switching instruction sent by a user through an external device, a main controller determines a switched image mode; when the main controller determines that the switched image mode is the first image mode, a first color gamut conversion instruction is sent to the display controller; the first color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a first color 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, a second color gamut conversion instruction is sent to the display controller; the second color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a second color gamut range; the display controller responds to the second color gamut conversion instruction, analyzes the image data by adopting a second color gamut range, and drives the light valve modulation component to display menu images;
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, a user selects the image mode for displaying the menu image through the external equipment according to personal preference by adopting the method, so that the three-color laser projection equipment is more flexible and various in use, and different use requirements of the user are met.
In some embodiments of the present invention, the first gamut satisfies any one of Rec.709 and DCI-P3, and the second gamut satisfies BT2020.
In a second aspect of an embodiment of the present invention, there is provided a three-color laser projection apparatus including: a main controller, a display controller and a light valve modulation unit; the display controller is used for driving the light valve modulation component;
the main controller is used for receiving the image data; when the menu data is identified in the received image data, sending a notification message to a display driving controller; the notification message is used for indicating the display controller to perform color gamut conversion;
the display driving 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 device.
The three-color laser projection device can automatically convert the display color gamut into the first color gamut when the menu image is displayed, so that the color of the menu image displayed by adopting the first color gamut is more similar 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 device is effectively solved.
In a third aspect of embodiments of the present invention, there is provided a readable storage medium storing executable instructions of a three-color laser projection apparatus, the executable instructions of the three-color laser projection system being configured to cause the three-color laser projection apparatus to perform 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 that are needed 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 other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a projection system according to the present invention;
FIG. 2 is a color chart of a three-color laser projection apparatus provided by the present invention;
FIG. 3 is a schematic 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 diagram of a menu interface according to an 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 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 flowchart of a laser projection display method according to an embodiment of the present invention;
fig. 12 is a schematic diagram of a remote control device key 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 flowchart of a laser projection display method according to an embodiment of the invention.
Wherein, 1-projection equipment, 2-projection screen, 11-main controller, 12-display controller, 13-light valve modulation unit, 14-laser light source, 15-projection lens.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a further description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. However, the exemplary embodiments can be embodied in many 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 the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted. The words expressing the positions and directions described in the present invention are described by taking the drawings as an example, but can be changed according to the needs, and all the changes are included in the protection scope of the present invention. The drawings of the present invention are merely schematic representations of relative positional relationships and are not intended to represent true proportions.
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 good viewing atmosphere, and is widely applied to the fields of film and television entertainment, education and teaching and the like at present.
Fig. 1 is a schematic diagram of a projection system according to 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 imaging light rays emitted by the projection device 1 for image display. The projection screen 2 is a square or rectangular white curtain in general, but is not limited to this, and may be a white wall when applied to home theatres or general conference projection; when the display device is applied to head-up display of an automobile, the display device can also be a front windshield of the automobile; when applied to display of exhibits, the display window can also be an exhibit cabinet window 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 arranged opposite to each other and are separated by a set distance for image data processing and emitting imaging light.
The projection device 1 mainly comprises two display modes, one is to use a monochromatic light source to perform time-sharing display in cooperation with a color wheel, and the other is to use a three-color light source to perform three-primary-color display. Due to the persistence of vision of the human eye, the primary colors alternately irradiated at high speed on the same pixel position are mixed and superimposed to view the color.
The light source of the projection apparatus 1 may employ a light emitting diode (Light Emitting Diode, LED for short), an Electro-Luminescence (EL) device, a laser, or the like. The laser beam emitted by the laser has good monochromaticity, high color purity, high brightness and directivity, and is widely used as a light source of projection equipment at present. The three-color laser projection device adopts the red, green and blue lasers as light sources, realizes image display through three-color lasers, 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 chart of a three-color laser projection apparatus provided by the present invention.
The size of a color gamut that can be displayed when the three-color laser projection apparatus displays an image is related to the wavelengths of the red laser beam, the green laser beam, and the blue laser beam emitted from the red, green, and blue three-color lasers, respectively, as light sources. The half-width of the wavelength of the laser beam emitted by the laser is narrower, the color purity is high, as shown in fig. 2, the color gamut range (the area of the triangle surrounded by the dashed line corresponding to the three-color laser projection device in fig. 2) which can be achieved by directly performing image display by the three-color laser beam of the three-color laser projection device at present is larger than the maximum color gamut defined by the color gamut standard of the image signal (the area of the triangle surrounded by the dashed line corresponding to the BT2020 standard in the figure), so that the three-color laser projection device is adopted for performing image display, and the viewing requirement of a large-color gamut film source can be met.
For the three-color laser projection apparatus, various image modes may be configured, for example, a standard image mode and a vivid image mode may be set, in which the color gamut range corresponding to the standard image mode is smaller than that corresponding to the vivid 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, and the like; the color gamut range corresponding to the vivid image mode satisfies a preset color gamut range of the three-color laser projection apparatus, such as the color gamut range of BT2020 or the three-color laser projection apparatus itself. The three-color laser projection device defaults to adopt a standard image mode for multimedia image display when leaving a factory, and a user can select different image modes according to preference in the process of multimedia image display.
However, for the menu image, the menu image is a signal generated by the three-color laser projection device, so that the menu image is displayed by default in a preset color gamut range of the three-color laser projection device, and the menu image is displayed in an unnatural color due to a larger preset color gamut range of the three-color laser projection device, so that the display effect is affected.
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 part 13, a laser light source 14, and a projection lens 15.
The laser light source 14 is used for emitting laser light of different colors according to a set time sequence. The light valve modulation part 13 is located at 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 modulation unit 13, and is used for driving the light valve modulation unit to display images. In the embodiment of the invention, the light valve modulation component can adopt a digital micro-mirror (Digital Micromirror Device, abbreviated as DMD) which comprises a plurality of reflection units, and the reflection units deflect at high speed under the drive of a driving signal to realize the function of an optical switch, so that three-color laser is mixed for image display. The projection lens 15 is located on the optical path of the imaging light reflected by the light valve modulation part 13, and is used for imaging the outgoing light of the light valve modulation part 13. The main controller 11 is connected to the display controller 12, and is configured to process the received image data and send the data and related instructions to the display controller.
In the process of displaying an image, the main controller 11 receives image data and decodes the received image data, and when implementing, the main controller 11 may decode the received image data into a Low-voltage differential signal (Low-Voltage Differential Signaling, abbreviated as LVDS). The main controller 11 transmits the decoded image data to the display controller 12, and the display controller 12 receives the decoded image data, parses the received image data into three primary color driving signals, and drives the light valve modulation section 13 according to the three primary color driving signals to perform image display.
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 the currently set image mode of the three-color laser projection device after receiving the image data, for example, when the currently set image mode of the three-color laser projection device is the standard image mode, the main controller 11 converts the display color gamut range of the image into the color gamut range satisfying rec.709 or DCP-P3 after receiving the image data.
However, the main controller 11 performs conversion of the color gamut range only for multimedia data, and when receiving menu data for displaying a menu image, the main controller 11 cannot perform color gamut conversion but directly performs menu image display using the color gamut range preset by the three-color laser projection apparatus.
FIG. 4 is a schematic diagram of a menu interface according to an embodiment of the present invention; FIG. 5 is a second diagram of a menu interface according to an embodiment of the present invention.
As shown in fig. 4 and 5, the menu data is data for displaying a menu interface, which is generally used for displaying a system main menu interface, displaying functions of system parameter settings, user preference settings, and the like.
For example, as shown in fig. 4, a menu interface may be used to display setting parameters of the projection apparatus, on which parameter information and factory information of the projection apparatus are displayed, and the user may perform operations such as size, resolution, brightness, contrast setting, signal source selection, viewing of a system version number, and the like. Alternatively, as shown in fig. 5, the menu interface may be used as a main menu interface on which information such as a movie program is displayed, and the user may select a movie or television desired to be watched, or search for a movie program desired to be watched, or the like. The embodiments of the present invention are only illustrated in fig. 4 and 5 for two cases where a three-color laser projection apparatus displays menu images, and do not represent that the three-color laser projection apparatus can only display the two menu images.
Since the main controller 11 does not perform color gamut conversion after receiving the menu data, the menu image usually contains less color types, and when the menu image is displayed in the color gamut range preset by the three-color laser projection device, the depth of each color is deeper, the visual stimulus is larger, and especially when displaying the color sensitive to the vision such as red, the problem that the display color is unnatural occurs when the three-color laser projection device displays the menu interface.
In view of this, the embodiment of the invention provides a laser projection display method, which can solve the problem that the display color of the three-color laser projection device is unnatural when a menu interface is displayed.
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 by an embodiment of the present invention includes:
s100: the main controller receives image data;
s210: when the main controller identifies menu data in the received image data, a notification message is sent to the display driving controller;
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 menu images.
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, etc., such as multimedia data, and the multimedia data may include HDMI Video data, video data, etc. Or the image data may be generated by an image generator internal to the three-color laser projection device, such as menu data. The main controller can identify the type of the image data in the process of receiving the image data, and can identify the type of the image data in various modes, specifically, the main controller can input the multimedia data and the menu data into the main controller through the same interface, and identify the type of the signal through a specific identification in the image data, or input the multimedia data and the menu data into the main controller through two different interfaces, and the main controller judges the type of the video signal according to the interface of the input video signal, and other judging modes can be selected according to actual conditions, and the list is omitted.
Since the main controller does not perform 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 color gamut conversion is transmitted to the display controller.
After receiving the notification message, the display controller responds to the notification message to analyze the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display the menu image so that the color gamut of the displayed menu image meets the first color gamut range.
The process can be automatically operated when the three-color laser projection equipment displays images, when the main controller recognizes menu data, the main controller immediately informs the display controller, and when the display controller receives 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 device.
In some embodiments, the first gamut range satisfies Rec.709, DCP-P3, and the pre-set gamut range of the three-color laser projection device satisfies BT2020 or the gamut of the three-color laser projection device itself.
In some embodiments, the first gamut range may be a gamut that is adjusted according to the display performance of the three-color laser projection device, so that human eyes feel comfortable, and a better display effect is achieved.
The menu image is displayed by adopting the first color gamut range, the color of the menu image is more similar to the color of the standard color gamut range or the color which is more comfortable to human eyes, and the problem that the color is unnatural 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 invention.
In the embodiment of the invention, after receiving the image data, the main controller needs to send the image data to the display controller to analyze the image data into the driving signal for driving the light valve modulation component to display the image. In the actual implementation process, the display controller cannot directly analyze the image data, and the main controller needs to decode the received image data before sending the image data to the display controller. In specific implementation, as shown in fig. 9, the main controller receives image data, and specifically includes:
s110: the main controller receives the image data and decodes the image data;
when the main controller identifies menu data in the received image data, a notification message is sent to the display controller, and the method comprises the following steps:
s211: and when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller.
Specifically, after receiving the image data, the main controller decodes the image data into LVDS data. And when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller. Fig. 8 is a third flowchart of a laser projection display method according to an embodiment of the 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 from the received image data, a first color gamut conversion instruction may be generated, 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 gamut conversion instruction to the display controller. 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 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 for 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: the display controller determines the current image data as menu data according to the image data type information, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display images.
When the menu data is identified in the received image data, the main controller sends a notification message to the display driving controller, wherein the notification message comprises an image data type message, and the image data type message is used for indicating that the currently processed image data is the 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 the current image data as 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 the embodiment of the invention, when the main controller identifies the menu data in the received image data, a first color gamut conversion instruction can be generated to directly instruct the display controller to perform color gamut conversion, or an image data type message is sent to the display controller, and the display controller automatically performs color gamut conversion after determining that the image data is the menu data, which is not limited herein.
Fig. 10 is a flowchart of a laser projection display method according to an embodiment of the present invention.
In an embodiment of the present invention, as shown in fig. 10, a display controller, in response to a notification message, analyzes image data using a preset first color gamut range, and drives a light valve modulation component to display a menu image, and specifically includes:
s313: the display controller responds to the notification message and adopts a preset first color gamut range to analyze the received image data into three primary color driving signals;
s314: the display controller drives the light valve modulation component to display images according to the three primary color driving signals.
In a specific implementation, the display controller also needs to analyze the received image data into a driving signal after receiving the image data decoded by the main controller, and the driving signal is used for driving the light valve modulation component to display the image.
Specifically, when the main controller identifies menu data in the received image data, the main controller decodes the image data, and sends the decoded image data and notification information to the display controller, the display controller receives the decoded image data and notification information, analyzes the received image data into three primary color driving signals by adopting a preset first color gamut range in response to the notification information, and drives the light valve modulation component to display images according to the three primary color driving signals. The display controller drives the light valve modulation component according to a three-primary-color driving signal obtained by analyzing the image data by adopting a 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, the display controller is pre-stored with first color gamut information matched with the first color gamut and a preset image data analysis rule, wherein the first color gamut information and the image data analysis rule can be pre-written into the display controller in a coding mode. 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 red, green and blue tristimulus coordinate point values of the first color gamut range, and when the implementation is performed, the display controller analyzes the image data according to the prestored red, green and blue tristimulus coordinate point values of the first color gamut range and the mapping relation between the first color gamut range and the preset color gamut range of the three-color laser projection device after receiving the notification message, so that the color gamut of the display controller when driving the light valve modulation component to display the menu image according to the three-primary color driving signal obtained by analysis meets the first color gamut range, and the problem of unnatural color when displaying the menu image is overcome.
Fig. 11 is a flowchart of a laser projection display method according to an embodiment of the present invention.
In an 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 embodiments, the host 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 already performs color gamut conversion in the process of decoding the image signal, and the display controller is not required 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 of the multimedia image display 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-up 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 device 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 device or in the switching process of the menu image and the multimedia image, so as to optimize the display effect.
In order to make the above-described laser projection display method clearer, a case where the three-color laser projection apparatus switches between the menu image and the multimedia image will be exemplified below.
Fig. 12 is a schematic diagram of a remote control device key according to an embodiment of the present invention.
As shown in fig. 12, in some embodiments, the remote control device key includes a "main menu" key and a "determine full screen" key, where, when the multimedia video is watched, after pressing the "main menu" key, the remote control device may send an instruction to the three-color laser projection device to control the three-color laser projection device to exit the display of the multimedia video, and display the main menu interface in full screen, where the image data received by the main controller is switched from the multimedia data to the menu data. The main menu interface may display related information as shown in fig. 5, on which information such as a movie program may be displayed, and the user may select a movie program such as a movie, a television show, etc. desired to be watched through "up", "down", "left", "right" buttons on the remote control device. The user confirms the video program to be watched by pressing the 'confirm full screen' button on the device, at the moment, the remote control device sends an instruction to the three-color laser projection device to control the three-color laser projection device to exit the main menu interface, the multimedia video playing interface is displayed in full screen, the user can watch the multimedia video under the interface, and at the moment, the image data received by the main controller is switched from the menu data to the multimedia data. Here, only the naming and the functions of the remote control device keys are exemplarily described, and the functions of the three-color laser projection device and the key functions 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 to switch between multimedia data and menu data by the remote control apparatus, the three-color laser projection apparatus performs the steps of:
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 multimedia data to menu data, and at this time, the following steps are performed:
s211: when the main controller identifies menu data in the received image data, the decoded image data and notification messages are sent to the display controller;
s313: the display controller responds to the notification message and adopts a preset first color gamut range to analyze the received image data into three primary color driving signals;
s314: the display controller drives the light valve modulation component to display images according to the three primary color driving signals;
when the "determine full screen" key of the remote control device is pressed, the image data is switched from the menu data to the multimedia data, and at this time, the following steps are performed:
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, in displaying an image by a three-color laser projection device, a main controller receives image data and decodes the image data.
When a user watches the multimedia video, the remote control device sends an instruction to the three-color laser projection device by pressing the key of the main menu of the remote control device, the three-color laser projection device is controlled to exit the display of the multimedia video, the main menu interface is displayed in a full screen mode, and information such as a film and television program can be displayed on the interface, at the moment, the image data received by the main controller is switched from the multimedia data to the menu data. And when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller. Wherein the notification message may include a color gamut conversion instruction or image data type information.
After receiving the decoded image data and the notification message, the display controller responds to the notification message to analyze the received image data into a three-primary-color driving signal by adopting a first color gamut according to the pre-stored first color gamut information matched with the first color gamut and a pre-set image data analysis rule.
After the analysis is completed, the display controller drives the light valve modulation component to display menu images according to the three primary color driving signals.
On the main interface shown in fig. 5, the user selects a movie program such as a movie, a television series, or the like to be viewed by "up", "down", "left", "right" keys on the remote control device shown in fig. 12. The user confirms the video program to be watched by pressing the 'confirm full screen' button on the device, at this time, the remote control device sends an instruction to the three-color laser projection device to control the three-color laser projection device to exit the main menu interface and display the multimedia video playing interface 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 transmits 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 illustrative of one way of switching the multimedia data and the menu data by transmitting an instruction through the remote control device, and does not represent that switching between the multimedia data and the menu data can be performed only by this way. In the embodiment of the invention, no matter what mode is adopted to switch the multimedia data and the menu data, the laser projection display method provided by the embodiment of the invention can be executed after the image data is switched, so that the mode of switching the multimedia data and the menu data is not listed one by one.
In the starting-up process of the three-color laser projection equipment, the three-color laser projection equipment usually directly enters a main menu interface, so that the function of color gamut conversion can be automatically operated in the starting-up process, and the color gamut range of the menu image is more in line with the viewing habit of human eyes. And when the user selects the watched multimedia video on the main menu interface, the user enters a related process of converting the menu data into multimedia data, which is not described herein.
In some embodiments, different image modes may be selected for displaying the menu image according to user preference, where the different image modes correspond to different color gamut ranges.
Fig. 14 is a flowchart of a laser projection display method according to an embodiment of the invention.
Specifically, as shown in fig. 14, the laser projection display method provided by 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 a switched image mode; when the image mode is the first image mode, steps S510 to S610 are executed; when the image mode is the second image mode, steps S520 to S620 are executed;
s510: transmitting a first 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 gamut conversion instruction, analyzes the image data by adopting the second color gamut range, and drives the light valve modulation component to display menu images.
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 remote control equipment, keys on the three-color laser projection equipment and the like, and control the three-color laser projection equipment to display the menu image in an image mode selected by the user.
In the implementation, a correspondence between the image mode and the color gamut conversion instruction may be established in advance, and the correspondence may be stored in the main controller. When receiving an image mode switching instruction sent by a user through external equipment, the main controller determines a switched image mode, and can generate a corresponding color gamut conversion instruction according to a 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 to analyze the image data by adopting a first color gamut range and drives the light valve modulation component to display menu images. The first color gamut conversion instruction is used for instructing the displayed controller to convert the color gamut of the display image into a first color gamut range.
Specifically, after receiving the menu data, the main controller decodes the menu data, and when the main controller determines that the switched image mode is the first image mode, the decoded image data and the first color gamut conversion instruction are sent to the display controller, the display controller responds to the first color gamut conversion instruction, 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 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, and the specific conversion method can be seen from the foregoing, and is not repeated herein.
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, and the display controller responds to the second color gamut conversion instruction to analyze the image data by adopting a second color gamut range and drives the light valve modulation component to display menu images. The second color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a second color gamut range.
Specifically, after receiving the menu data, the main controller decodes 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 gamut conversion instruction to the display controller, the display controller responds to the second color gamut conversion instruction, analyzes the received image data into three primary color driving signals according to the second color gamut range information which is pre-stored and matched with the second color gamut range and the preset 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 the specific conversion method can be seen in the foregoing, and is not repeated herein.
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 therefore, the image mode in which the menu image is displayed using the first color gamut range can be defined as the standard image mode, and the image mode in which the menu image is displayed using the second color gamut range can be defined as the vivid image mode.
In some embodiments, the second gamut range may be a gamut range preset by the three-color laser projection device. Because the three-color laser projection equipment adopts the preset color gamut range to display the menu image by default, when the main controller determines that the color gamut conversion instruction corresponds to the second color gamut, the display controller does not convert the color gamut range for displaying the menu image after receiving the second color gamut conversion instruction, and the menu image can be displayed by directly adopting the color gamut range preset by the three-color laser projection equipment.
In specific implementation, the first color gamut range may satisfy any one of rec.709 and DCP-P3, and the preset color gamut range of the three-color laser projection device may satisfy the color gamut range of BT2020 or the three-color laser projection device itself.
In order to make the above-mentioned method for displaying menu images using a selected color gamut more clear, a description will be given below of a scene in which menu images are displayed by selecting an image mode by a remote control device.
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, when the 'bright mode' key is pressed, the three-color laser projection device can be selected to display the menu image in the second color gamut range, and when the 'standard mode' key is pressed, the three-color laser projection device can be selected to display the menu image in the first color gamut range.
In the process of displaying the menu image, a user selects the image mode for displaying the menu image through the remote control device according to personal preference, so that the three-color laser projection device is more flexible and various in use, and different use requirements of the user are met. Here, only the naming and the functions of the remote control device keys are exemplarily described, and the functions of the three-color laser projection device and the key functions of the remote control device are not limited. In some embodiments, the three-color laser projection device may also include more image modes, not limited herein.
Another aspect of an embodiment of the present invention provides a three-color laser projection apparatus, the three-color laser projection apparatus may have a structure as shown in fig. 3, and specifically includes: a main controller 11, a display controller 12, a light valve modulation part 13, a laser light source 14, and a projection lens 15.
The light valve modulation component 13 is located at the light emitting side of the laser light source 14, and is configured to modulate and reflect 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 modulation part 13, and is used for imaging the outgoing light of the light valve modulation part 13. The main controller 11 is connected to a display controller 12, and the display controller 12 is used for driving the light valve modulation unit.
In particular, the main controller 11 is configured to receive image data, and to 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 parse the image data with a preset first color gamut range in response to the notification message, and drive the light valve modulation 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 device.
In some embodiments, the host controller is specifically configured to receive and decode image data; and when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller.
In some embodiments, 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 of the display image into a first color 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. The display controller determines the current image data as menu data according to the image data type information, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display images.
In some embodiments, the display controller is specifically configured to parse 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, the main controller transmits 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; and 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, in displaying the menu image, the main controller determines the switched image mode when receiving an image mode switching instruction transmitted by the user through the external device.
When the main controller determines that the switched image mode is the first image mode, a first color gamut conversion instruction is sent to the display controller; the first color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a first color 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 menu images.
When the main controller determines that the switched image mode is the second image mode, a second color gamut conversion instruction is sent to the display controller; the second color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a second color gamut range; the display controller responds to the second color gamut conversion instruction, analyzes the image data by adopting the second color gamut range, and drives the light valve modulation component to display menu images.
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 of Rec.709, DCI-P3, and the second gamut range satisfies BT2020.
The embodiment of the invention also provides a readable storage medium which stores executable instructions of the three-color laser projection device, wherein the executable instructions of the three-color laser projection device are used for enabling the three-color laser projection device 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; when the main controller identifies menu data in the received image data, a notification message is sent to the display driving controller; the notification message is used for indicating 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 device. 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 more similar to the color of the standard color gamut or the color which is more comfortable to 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 a second inventive concept, the notification message comprises 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.
According to a third inventive concept, 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 determines the current image data as menu data according to the image data type information, analyzes the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display images.
According to a fourth inventive concept, a main controller receives image data and decodes the image data; and when the main controller identifies the menu data in the received image data, the decoded image data and the notification message are sent to the display controller.
According to a fifth inventive concept, a display controller parses received image data into three primary color driving signals using a preset first color gamut range in response to a notification message; the display controller drives the light valve modulation component to display images according to the three primary color driving signals.
According to a sixth inventive concept, the main controller transmits 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.
According to a seventh inventive concept, in displaying a menu image, a main controller determines a switched image mode when receiving an image mode switching instruction transmitted from a user through an external device; when the main controller determines that the switched image mode is the first image mode, a first color gamut conversion instruction is sent to the display controller; the first color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a first color 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, a second color gamut conversion instruction is sent to the display controller; the second color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a second color gamut range; the display controller responds to the second color gamut conversion instruction, analyzes the image data by adopting a second color gamut range, and drives the light valve modulation component to display menu images; 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, a user selects the image mode for displaying the menu image through the external equipment according to personal preference by adopting the method, so that the three-color laser projection equipment is more flexible and various in use, and different use requirements of the user are met.
According to the eighth inventive concept, the first color gamut range satisfies any one of rec.709 and DCI-P3, and the second color gamut range satisfies BT2020.
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. It is therefore intended that the following claims be interpreted as including the 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 modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. A laser projection display method, which is characterized by being applied to a three-color laser projection device, wherein the three-color laser projection 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 to display images; the method comprises the following steps:
The main controller receives image data;
when the main controller identifies menu data in the received image data, a notification message is sent to the display controller; the notification message is used for indicating the display controller to perform color gamut conversion;
the display controller responds to the notification message to analyze 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 the color gamut range preset by the three-color laser projection device.
2. The method of claim 1, wherein the notification message comprises 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 notification message to analyze the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images, and the display controller comprises:
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 to analyze the image data by adopting a preset first color gamut range, and drives the light valve modulation component to display menu images, and the display controller comprises:
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 images.
4. A method according to any one of claims 1 to 3, wherein the main controller receives image data, comprising:
the main controller receives image data and decodes the image data;
the main controller sends a notification message to the display controller when the menu data is identified in the received image data, and the notification message comprises:
and when the main controller identifies 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 parsing the image data using a preset first gamut range in response to the notification message and driving the light valve modulation device to display the menu image, 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 as recited in claim 4, further comprising:
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;
and the display controller drives the light valve modulation component to display the multimedia image according to the three primary color driving signals.
7. A method according to any one of claims 1 to 3, further comprising:
in the process of displaying the menu image, the main controller determines a switched image mode when receiving an image mode switching instruction sent by a user through external equipment;
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 color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a first color gamut range;
the display controller responds to the first color gamut conversion instruction to analyze 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 color gamut conversion instruction is used for instructing the display controller to convert the color gamut of the display image into a second color gamut range;
the display controller responds to the second color gamut conversion instruction, analyzes the image data by adopting a second color gamut 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 color gamut range satisfies any one of rec.709, DCI-P3, and the second color gamut range satisfies BT2020.
9. A three-color laser projection apparatus, comprising: 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;
the main controller is used for receiving image data; when the menu data is identified in the received image data, sending a notification message to the display controller; the notification message is used for indicating 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 the color gamut range preset by the three-color laser projection device.
10. A readable storage medium storing executable instructions of a three-color laser projection device for causing the three-color laser projection device to perform the laser projection display method of any one of claims 1-8.
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| PCT/CN2023/097493 WO2023232084A1 (en) | 2022-06-01 | 2023-05-31 | Projection device, display method therefor, and storage medium |
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| WO2023232084A1 (en) * | 2022-06-01 | 2023-12-07 | 青岛海信激光显示股份有限公司 | Projection device, display method therefor, and storage medium |
| WO2024041070A1 (en) * | 2022-08-26 | 2024-02-29 | 青岛海信激光显示股份有限公司 | Projection display method, projection device and storage medium |
| CN115396641B (en) * | 2022-08-26 | 2024-03-19 | 青岛海信激光显示股份有限公司 | Laser projection display method, three-color laser projection apparatus, and readable storage medium |
| CN115396642B (en) * | 2022-08-26 | 2024-03-19 | 青岛海信激光显示股份有限公司 | Laser projection display method, three-color laser projection apparatus, and readable storage medium |
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