Laser projection device, display method, and storage medium

Abstract

The present application relates to the technical field of display, and discloses a laser projection device, a display method, and a storage medium. The laser projection device comprises a main control chip and a display driving assembly; the main control chip is used for acquiring position information of a subtitle area in a first picture and sending image data of the first picture and the position information of the subtitle area to the display driving assembly; and the display driving assembly is used for determining a first target area on the basis of the position information of the subtitle area, wherein the first target area is an area other than the subtitle area in the first picture, performing dimming processing on the image data of the first picture on the basis of the first target area, and displaying, on the basis of the image data subjected to the dimming processing, a second picture after dimming processing. In this way, the display effect optimization range is limited in the first target area other than the subtitle area, so that the impact of the excessively high brightness of the subtitle area on the overall brightness of pictures is effectively avoided, thereby improving the dimming effect and the display effect of pictures.

Description

Laser projection device, display method and storage medium

[0001] This application claims priority to Chinese patent application No. 202410251119.X, filed on March 5, 2024, with the invention name “Laser projection device, display method and storage medium”, and Chinese patent application No. 202410837410.5, filed on June 26, 2024, with the invention name “Laser projection device and display method”, the entire contents of which are incorporated by reference into this application. Technical Field

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

[0003] Laser projection devices such as laser TVs and laser projectors can enable dynamic dimming during the display process to adjust the brightness distribution of the screen in real time according to the content of the displayed screen to achieve a more ideal display effect. When the dynamic dimming function is turned on, the digital light processing (DLP) component in the laser projection device will dim the displayed image based on the average brightness of the full-screen pixels or the overall brightness distribution. However, in some scenes where the overall image is dark and contains highlighted subtitles, in order to balance the overall brightness of the image, the brightness of the non-subtitle area will be reduced during the dimming process, while the brightness of the subtitle area will be increased. As a result, the brightness of the subtitle area in the dimmed image is too high, while the brightness of the non-subtitle area is too low, resulting in poor overall display effect. Summary of the Invention

[0004] This application provides a laser projection device, display method, and storage medium that can eliminate the influence of the subtitle area during dimming processing to improve the dimming and display effects of the entire picture. The technical solution is as follows:

[0005] In a first aspect, a laser projection device is provided, the laser projection device comprising a main control chip and a display driver component;

[0006] The main control chip is used to obtain position information of the subtitle area in the first picture, and send the image data of the first picture and the position information of the subtitle area to the display driving component;

[0007] The display driver component is used to determine a first target area based on the position information of the subtitle area, where the first target area is an area in the first picture excluding the subtitle area; based on the first target area, dimming processing is performed on the image data of the first picture, and display of a second picture after dimming processing is realized based on the image data after dimming processing.

[0008] In a second aspect, a display method is provided, which is applied to a laser projection device, and the method includes:

[0009] Obtaining position information of the subtitle area in the first picture;

[0010] determining a first target area based on the position information of the subtitle area, where the first target area is an area in the first picture excluding the subtitle area;

[0011] Based on the first target area, dimming processing is performed on the image data of the first picture, and a second picture after the dimming processing is displayed.

[0012] In a third aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores at least one instruction, at least one program, a code set, or an instruction set, and the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the display method provided in the second aspect above.

[0013] In a fourth aspect, a computer program product is provided, wherein the computer program product includes program instructions, and when the program instructions are executed by a processor, the display method provided in the second aspect is implemented.

[0014] As can be seen from the above technical solutions, in the laser projection device and display method provided by this application, when the laser projection device is displaying an image, the main control chip identifies the first image to be displayed, extracts the position information of the subtitle area in the first image, and sends the position information of the subtitle area and the image data of the first image to the display driver component. In this way, when the display driver component optimizes the display effect of the first image, it can limit the scope of display effect optimization to the first target area excluding the subtitle area based on the position information of the subtitle area, which can effectively avoid the impact of excessive brightness of the subtitle area on the overall brightness of the image, thereby improving the image dimming effect and display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] FIG1 is a schematic structural diagram of a laser projection device provided in an embodiment of the present application;

[0017] FIG2 is a schematic diagram of a screen partition provided by an embodiment of the present application;

[0018] FIG3 is a schematic structural diagram of another laser projection device provided in an embodiment of the present application;

[0019] FIG4 is a schematic diagram of a subtitle area identification method provided by an embodiment of the present application;

[0020] FIG5 is a logic diagram of whether to perform zone dimming processing on a screen according to an embodiment of the present application;

[0021] FIG6 is a schematic structural diagram of another laser projection device provided in an embodiment of the present application;

[0022] FIG7 is a flow chart of a display method provided in an embodiment of the present application;

[0023] FIG8 is a flow chart of another display method provided in an embodiment of the present application;

[0024] FIG9 is a schematic diagram of a position offset of a display area after image adjustment according to an embodiment of the present application;

[0025] FIG10 is a schematic diagram of a mapping relationship of display areas provided in an embodiment of the present application;

[0026] FIG11 is a flow chart of another display method provided in an embodiment of the present application;

[0027] FIG12 is a schematic structural diagram of a display device provided in an embodiment of the present application;

[0028] FIG13 is a schematic structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose and implementation of this application clearer, the exemplary implementation of this application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only part of the embodiments of this application, not all of the embodiments.

[0030] It should be noted that the brief descriptions of the terms in the examples of this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0031] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0032] First, the architecture of the laser projection device and the imaging principle are explained.

[0033] Figure 1 is a schematic diagram of the structure of a laser projection device. As shown in Figure 1, after the upper shell of the laser projection device is disassembled, its internal structure can be divided into a laser light source 100, an optical engine 200, and a projection lens 300 according to optical functions.

[0034] The optical engine 200 can integrate multiple optical modulation components, such as phase light modulators (PLMs) such as light rods and relay lenses, as well as key components such as amplitude modulators. Phase modulators are used to shape and homogenize laser light, while amplitude modulators are core components of laser projection equipment, capable of adjusting the amplitude of light waves (i.e., light intensity or brightness).

[0035] In projection display technology, an amplitude light modulator (also known as a light valve) is a component that can control the amplitude (or intensity) of light passing through it, thereby achieving dynamic display of images or videos. Furthermore, amplitude light modulators can be divided into transmissive liquid crystal displays (LCDs), liquid crystal on silicon (LCOS), and digital micromirror devices (DMDs) chips. DMD chips are commonly used in digital light processing (DLP) projection architectures.

[0036] The laser light source 100 is used to provide a light source illumination beam. The laser light source 100 may include at least one color laser, such as a blue laser; it may also be a dual-color laser, such as a blue laser and a red laser; or it may be a three-color laser light source, such as a red (RED, R), green (Green, G), and blue (Blue, B) laser, for providing a three-color laser illumination beam.

[0037] Taking the laser light source 100 as a three-color laser light source as an example, in a laser projection device without a PLM, the laser of the three-color laser light source sequentially emits R, G, and B laser beams, which are sequentially irradiated onto the amplitude modulator. Taking the amplitude modulator as a DMD as an example, consistent with the emission timing of the three-color laser beams, the DMD sequentially receives three video image signals for the three-color laser beams, flips the thousands of tiny mirrors on its surface at positive or negative angles corresponding to the video / image signals, and reflects the laser beams irradiated onto its surface into the projection lens 300. Based on this, the laser beams irradiated onto the DMD are amplitude modulated to achieve projection imaging. In other words, when a red laser beam is irradiated onto the DMD, the DMD amplitude modulates the red laser beam according to the video image signal for the red laser beam, and so on.

[0038] It should be understood that in the above-mentioned laser projection process, although the three laser beams for a complete frame of image are emitted sequentially, due to the fast sequential emission speed and the persistence of vision of the human eye, the laser projection equipment can realize the display of the projected image.

[0039] In a laser projection system that includes a PLM, the lasers of the three-color laser light source sequentially emit R, G, and B laser beams, which are then sequentially projected onto the PLM. Similarly, consistent with the timing of the three-color laser beams, the PLM sequentially receives three video image signals corresponding to the three-color laser beams and phase-modulates the laser beams directed at the PLM accordingly. The phase-modulated laser beams are then emitted to the DMD for amplitude modulation, completing the subsequent laser projection steps.

[0040] In some scenarios, users can use laser projection equipment (such as laser TVs, laser projectors) to play videos. The DLP end of the laser projection equipment (also known as DLP component, DLP) can enable dynamic dimming (also known as dynamic contrast) function during video playback. By calculating and processing the grayscale histogram of the displayed image, the display brightness of the image can be adjusted in real time, thereby improving the image display effect.

[0041] When the dynamic dimming function is turned on, in order to ensure that the highlight areas and low-brightness areas in the displayed image are well distinguished, the DLP end will control the DMD to fully turn on the light in the highlight areas of the image, and control the DMD to reflect excess light in the low-brightness areas, so as to enhance the contrast of the image and make the image more vivid and realistic.

[0042] It should be understood that the screen in the embodiments of the present application can also be called a display screen, an image, a display image, etc., and the embodiments of the present application do not distinguish or limit this.

[0043] Next, taking a single-frame image as an example, the process of implementing dynamic dimming on the DLP side is explained.

[0044] After receiving the video signal transmitted by the main control chip, the DLP terminal performs grayscale statistics on the full-screen pixels of each frame in the decoded video signal to obtain the grayscale histogram corresponding to the image. If the image displayed at the current moment is X, the image data of image X can be expressed by the following formula (1).

[0045] Among them, x ij is the grayscale value of each pixel in the image X, 1≤i≤m, 1≤j≤n, and i and j are both integers.

[0046] Based on the grayscale histogram of image X, the DLP analyzes the probability distribution curve of each pixel in image X at different grayscales to calculate the grayscale mapping function F corresponding to image X. The grayscale mapping function F can be expressed by the following formula (2).

[0047] Among them, f ij is the grayscale gain (also called image gain) of each pixel in image X, 1≤i≤m, 1≤j≤n, and i and j are both integers.

[0048] Furthermore, the DLP adjusts the grayscale value of each pixel in image X according to the grayscale mapping function F to obtain the adjusted grayscale value of each pixel (i.e., the new grayscale value). By mapping the grayscale value of each pixel in image X to the new grayscale value, the dimmed image X′ can be obtained.

[0049] As an example, the image data of the image X′ after the dimming process can be expressed by the following formula (3).

[0050] Based on the above description, it can be seen that when the DLP end performs dimming processing on image X, it performs grayscale histogram statistics on all pixels in image X, so as to achieve brightness adjustment of the pixels in image X.

[0051] However, in some scenes where the overall picture is dark and contains subtitles, see Figure 2. When the picture displayed by the laser projection device includes a subtitle area and a target area (that is, the area other than the subtitle area, which can also be called a non-subtitle area), the DLP end will combine the brightness of the subtitle area and the brightness of the target area for calculation when calculating the grayscale mapping function F. However, since the subtitles are usually white and have a high brightness, the overall brightness of the picture is increased, resulting in the picture after dimming on the DLP end visually showing that the brightness of the subtitle area is too high, and the brightness of the target area is too low, and the overall display effect of the picture is poor.

[0052] Based on this, an embodiment of the present application provides a laser projection device. When the dynamic dimming function is turned on, the laser projection device identifies and extracts the content of the displayed picture to determine the position information of the subtitle area in the picture, and then eliminates the subtitle area when calculating the grayscale mapping function F during the dimming process, and limits the calculation range of the grayscale mapping function F to the target area other than the subtitle area. In this way, the high brightness requirement of the subtitle area can be effectively avoided, which affects the overall brightness of the picture, thereby improving the picture dimming effect and the overall display effect.

[0053] Next, a solution for dimming a display screen using a laser projection device provided in an embodiment of the present application is described in detail.

[0054] Figure 3 is a structural schematic diagram of a laser projection device provided in an embodiment of the present application. The laser projection device 30 shown in Figure 3 can be the same device as the laser projection device shown in Figure 1. Figure 1 divides and introduces the hardware structure of the laser projection device based on the optical function; and Figure 3 takes picture dimming as an example to introduce the functional components involved. The components involved in Figures 1 and 3 may have an intersection / inclusion relationship. For example, the light source assembly of Figure 3 includes the laser light source 100 shown in Figure 1, but it does not constitute a restriction on the internal devices of the laser projection device.

[0055] 3 , laser projection device 30 includes a main control chip 301, a display driver component 302, a light modulation component 303, and a light source component 304. The main control chip 301 is connected to the display driver component 302, which is connected to the light modulation component 303 and the light source component 304, respectively. The light source component 304 is connected to the light modulation component 303.

[0056] In the embodiment of the present application, the main control chip 301 is used to obtain the position information of the subtitle area in the first picture, and send the image data of the first picture and the position information of the subtitle area to the display driver component 302. The display driver component 302 is used to determine a first target area based on the position information of the subtitle area, where the first target area is the area of ​​the first picture excluding the subtitle area; based on the first target area, dimming the image data of the first picture, and displaying the dimmed second picture based on the image data after the dimming process.

[0057] It should be understood that the first and second images have the same content, or are the same frame. With respect to dimming processing, the first image can be understood as the image before dimming processing, and the second image can be understood as the image after dimming processing, and the first and second images have different brightness.

[0058] In some embodiments, the first picture may be any frame in a video signal that includes a subtitle area. The video signal may be an external input signal or a signal generated based on an external video source. For example, the external video source may be a network video source, a video source transmitted via a High Definition Multimedia Interface (HDMI), or a video source stored in a storage medium such as a hard disk, and the embodiments of the present application do not limit this.

[0059] In one possible implementation, after the main control chip 301 obtains the video signal, it can decode the video signal, and based on the decoded video signal, identify the position information of the subtitle area in each frame, and send the decoded video signal and the position information of the subtitle area to the display driver component 302.

[0060] The decoded video signal may be a V-By-One digital interface standard (V-By-One) signal developed for image transmission, or a Low Voltage Differential Signaling (LVDS) signal.

[0061] In one possible implementation, the main control chip 301 determines the position information of the subtitle area by: obtaining the video stream and subtitle stream in the video signal; and determining the position information of the subtitle area in each frame of the video signal through a position recognition algorithm based on the video stream and the subtitle stream.

[0062] As an example, the position recognition algorithm may be a block matching algorithm, a Harris corner point extraction algorithm, etc., which is not limited in the embodiments of the present application.

[0063] In some embodiments, the position information of the subtitle area in the first picture may be the regional coordinates of the subtitle area. When the main control chip 301 recognizes that there are subtitles in the first picture, it determines the regional coordinates of the subtitle area as the position information of the subtitle area.

[0064] As an example, referring to the first picture of the example in Figure 4, the main control chip 301 recognizes that there are subtitles "XXXXXXX" below the first picture, and determines the area where the subtitles are located in the image as the subtitle area, and extracts the position coordinates of the subtitle area from the entire display area corresponding to the first picture to obtain the position information of the subtitle area.

[0065] Taking the image shown in FIG. 2 as the first image, the main control chip 301 identifies the image content and determines that the subtitle area in the first image is an m*b area. After the main control chip 301 sends the position information of the subtitle area in the first image to the display driver component 302, the display driver component 302 can determine that the first target area in the first image is an (nb)*m area based on the position information of the subtitle area.

[0066] In an embodiment of the present application, after the display driver component 302 determines the first target area in the first image, it can perform dimming processing on the image data of the first image based on the first target area to optimize the display effect of the first image. The display driver component 302 dimming the image data of the first image includes dimming the image data of the first target area and dimming the image data of the subtitle area. The dimming processes of these two areas are described separately below.

[0067] In some embodiments, the implementation process of the display driving component 302 performing dimming processing on the first target area can be: based on the image data of the first picture, obtaining the grayscale values ​​of multiple first pixel points in the first target area; based on the grayscale values ​​of the multiple first pixel points, determining the grayscale gains of the multiple first pixel points; based on the grayscale gains of the multiple first pixel points, adjusting the grayscale values ​​of the multiple first pixel points.

[0068] For example, the display driving component 302 may determine a grayscale histogram of the image data in the first target area according to the grayscale values ​​of the plurality of first pixels; and further determine grayscale gains of the plurality of first pixels based on the grayscale histogram.

[0069] It should be understood that for a first pixel point, it corresponds to an original grayscale value and a grayscale gain. The grayscale gain can be understood as the adjustment value of the original grayscale value, that is, by adjusting the original grayscale value based on the grayscale gain, the new grayscale value of the adjusted first pixel point can be obtained.

[0070] As an example, assuming that the first image is the image X shown in the above formula (1), and the first target area is the area of ​​(nb)*m, then the image data of the first target area can be expressed by the following formula (4).

[0071] Among them, X1 represents the first target area, x ij is the grayscale value of each first pixel in the first target area, 1≤i≤m, 1≤j≤nb, and i and j are both integers.

[0072] After the display driver component 302 obtains the grayscale value of each first pixel point in the first target area, it can obtain a grayscale histogram of the image corresponding to the first target area according to the grayscale value of each pixel point; based on the grayscale histogram, an image processing algorithm is used to calculate the grayscale gains of multiple first pixel points.

[0073] As an example, the image processing algorithm may be an edge operator algorithm, a histogram equalization algorithm, etc., which is not limited in the embodiments of the present application.

[0074] Correspondingly, the grayscale mapping function F1 corresponding to the first target area X1 can be expressed by the following formula (5).

[0075] Among them, f ij is the grayscale gain of each first pixel in the first target area X1, 1≤i≤m, 1≤j≤nb, and i and j are both integers.

[0076] Furthermore, the display driving component 302 adjusts the grayscale values ​​of the multiple first pixel points based on the grayscale gains of the multiple first pixel points to obtain adjusted grayscale values; maps the adjusted grayscale values ​​of the multiple first pixel points to the corresponding pixel points to obtain image data of the first target area after dimming processing.

[0077] The image data X1′ of the first target area after the dimming process can be expressed by the following formula (6).

[0078] As can be seen from this, when the first image includes a subtitle area, the laser projection device determines the grayscale mapping function based solely on the grayscale information of the first target area and performs dimming processing on the first target area based on the grayscale mapping function. Because the subtitle area is not taken into account when determining the grayscale mapping function, the information of the highlighted subtitle area does not participate in the brightness adjustment process of the first target area and naturally does not affect the dimming of the first target area, thereby improving the dimming effect of the first target area.

[0079] In some embodiments, the display driver component 302 may implement dimming processing of the subtitle area by: obtaining the brightness of multiple second pixel points in the subtitle area based on the image data of the first picture; and setting the brightness of the multiple second pixel points to the target brightness based on the brightness of the multiple second pixel points.

[0080] The target brightness can be determined based on prior knowledge, and can be a fixed value or a dynamically adjusted value, which is not limited in the present embodiment.

[0081] As an example, the display driving component 302 may determine the target brightness according to the ambient brightness and / or the brightness of a plurality of first pixels in the first target area.

[0082] The ambient brightness is the brightness of the environment in which the laser projection device 30 is located, and the ambient brightness can be collected by the main control chip 301 and sent to the display driver component 302. For example, the main control chip 301 can collect the ambient brightness through a sensor on the laser projection device 30.

[0083] Next, three implementations of the display driver component 302 determining the target brightness are introduced.

[0084] In a first manner, the display driver component 302 determines the target brightness according to the ambient brightness. For example, there is a mapping relationship (eg, a functional relationship) between the ambient brightness and the target brightness, and the display driver component 302 can determine the target brightness according to the ambient brightness and the mapping relationship.

[0085] In a second manner, the display driver component 302 determines the target brightness based on the brightness of the plurality of first pixels in the first target area. For example, the display driver component 302 may determine the overall brightness of the first target area based on the brightness of the plurality of first pixels. If a mapping relationship exists between the brightness of the first target area and the target brightness, the display driver component 302 determines the target brightness based on the brightness of the first target area and the mapping relationship.

[0086] In a third approach, the display driver component 302 determines the target brightness based on the ambient brightness and the brightness of multiple first pixels in the first target area. For example, the ambient brightness and the brightness of the first target area each have corresponding weighted values. The display driver component 302 can determine the initial brightness by weighted summation based on the ambient brightness, the brightness of the first target area, and the weighted values ​​corresponding to these two brightnesses, and further determine the target brightness based on the mapping relationship between the initial brightness and the target brightness.

[0087] It should be noted that the above three methods of determining target brightness are merely examples of determination logic based on mapping relationships and do not constitute a limitation on the methods of determining target brightness. Moreover, the above mapping relationships can all be preset and configured based on prior knowledge, and the embodiments of this application do not limit their determination process.

[0088] In some embodiments, when the display driver component 302 determines the brightness of the subtitle area, it can also select a target brightness from a preset brightness candidate list.

[0089] In one possible implementation, the display driver component 302 may determine the target brightness by: determining a first brightness based on the ambient brightness and / or the brightness of a plurality of first pixels; determining a target brightness from a brightness candidate list based on the first brightness; the brightness candidate list includes a plurality of second brightnesses, and the target brightness is the second brightness in the brightness candidate list having the smallest difference with the first brightness.

[0090] As an example, the first brightness determined by the display driver component 302 is 518 candelas per square meter (cd / m2), and the second brightness included in the brightness candidate list is 400 cd / m2. 2 , 450cd / m 2 , 500cd / m 2 , 550cd / m 2 At this time, the display driver component 302 can set the target brightness to 500 cd / m 2 , which will be in the brightness candidate list of 500cd / m 2 The second brightness is determined as the target brightness.

[0091] It should be understood that the implementation method of the display driving component 302 determining the first brightness based on the ambient brightness and / or the brightness of multiple first pixel points in the first target area is similar to the implementation method of determining the target brightness in the above example, and will not be repeated here.

[0092] It can be seen that by dynamically setting the brightness of the subtitle area to the target brightness, the brightness of the subtitle area is more closely matched with the ambient brightness or the overall brightness of the first picture, thereby further improving the display effect of the first picture.

[0093] In some embodiments, the first picture is dimmed to obtain a second picture, and the brightness of the subtitle area in the second picture is lower than the brightness of the subtitle area in the first picture.

[0094] Based on this, when controlling the display of the second picture after the dimming process, the display driver component adjusts the first control current for displaying the first picture to the second control current for displaying the second picture, wherein the first control current is greater than the second control current.

[0095] Since the dimming process can increase the brightness of the target area in the first picture, when the brightness of the subtitle area in the second picture is less than that of the subtitle area in the first picture, that is, when the dimming reduces the brightness of the subtitle area in the first picture, the contrast between the first target area and the subtitle area in the picture after the dimming process is more obvious, further improving the display effect of the first picture.

[0096] In some embodiments, the dimming triggering condition of the laser projection device is: the main control chip receives a dimming instruction, or detects that the dimming mode of the laser projection device is turned on.

[0097] That is, the main control chip 301 responds to the dimming instruction or detects that the dimming mode is turned on and performs the above-described operations to send the image data of the first picture and the position information of the subtitle area in the first picture to the display driver component 302.

[0098] In some embodiments, after receiving the image data of the first picture and the position information of the subtitle area in the first picture, the display driver component 302 determines whether to perform dimming processing on the first picture according to the brightness of the first target area in the first picture.

[0099] It should be noted that if the first image is generally dark, the brightness of the subtitle area will result in poor display quality after optimization. Therefore, the subtitle area needs to be removed when dimming the first image. If the first image is generally bright, the brightness of the subtitle area will have less impact on the display quality after dimming. Therefore, when dimming the first image, it is not necessary to remove the subtitle area, thereby reducing the power consumption of the laser projection device.

[0100] In one possible implementation, referring to FIG5 , the display driver component 302 obtains the brightness of a plurality of first pixels in a first target area based on the image data of the first screen; if the brightness of the first target area is determined to be less than a first brightness threshold based on the brightness of the plurality of first pixels, dimming processing is performed on the image data of the first screen based on the first target area. If the brightness of the first target area is determined to be greater than or equal to the first brightness threshold based on the brightness of the plurality of first pixels, dimming processing is directly performed on the image data of the first screen.

[0101] Among them, the first brightness threshold is a value determined based on prior knowledge, and the embodiment of the present application does not limit its specific value.

[0102] For example, if the brightness of the first target area is greater than or equal to the first brightness threshold, the display driving component 302 can count the brightness values ​​of multiple first pixel points in the first target area, and determine the average, median or mode of the brightness values ​​of the multiple first pixel points as the brightness of the first target area.

[0103] In other words, when the display driver component 302 determines that the brightness of the first target area is less than the first brightness threshold, it can be determined that the display brightness of the first picture is darker, and at this time, the subtitle area needs to be removed when dimming the first picture; and when the brightness of the first target area is greater than or equal to the first brightness threshold, it can be determined that the display brightness of the first picture is brighter, and at this time, the subtitle area does not need to be removed when dimming the first picture.

[0104] In the case where the subtitle area needs to be removed when dimming the first image, the display driver component 302 can directly set the brightness of the subtitle area to the target brightness.

[0105] After introducing the implementation logic of dimming processing for the first image, the implementation process of the display driver component 302 controlling the display of the second image after dimming processing is explained.

[0106] In some embodiments, after determining the image data after dimming processing of the first picture, the display driver component 302 can control the light source component 304 to illuminate based on the image data after dimming processing to emit primary color light that matches the image data after dimming processing. The display driver component 302 can also control the light modulation component 303 to modulate the primary color light emitted by the light source component 304 based on the image data after dimming processing to display the second picture.

[0107] In some embodiments, referring to FIG. 6 , the laser projection device 30 further includes: a laser driving component 305 , an optical engine 306 and a power supply component 307 .

[0108] Among them, the main control chip 301 is connected to the display driver component 302 and the power supply component 307; the display driver component 302 is connected to the light modulation component 303, the laser driver component 305, the main control chip 301 and the power supply component 307; the laser driver component 305 is connected to the light source component 304 and the display driver component; the light modulation component 303 is connected to the optical engine 306 and the display driver component 302; the light source component 304 is connected to the laser driver component 305, the optical engine 306 and the power supply component 307; the optical engine 306 is connected to the light source component 304 and the light modulation component 303.

[0109] The laser driving component 305 is used to send a driving signal to the light source component 304 to drive the light source component 304 to light up, thereby emitting primary color light.

[0110] The optical engine 306 is used to transmit the primary color light emitted by the light source assembly 304 to the light modulation assembly 303 , that is, the optical engine 306 is a light transmission channel between the light source assembly 304 and the light modulation assembly 303 .

[0111] The power supply component 307 is used to provide power support for the operation of the main control chip 301 , the display driver component 302 and the light source component 304 .

[0112] Continuing with FIG6 , when the main control chip 301 obtains the video signal and the position information of the subtitles in the video signal, it can send the image data of the first picture and the position information of the subtitle area in the first picture to the display driver component 302 via the Vx1 interface between the main control chip 301 and the display driver component 302. The display driver component 302 can perform dimming processing on the image data of the first picture based on the position information of the subtitle area in the first picture. The specific implementation process of the dimming processing is described above and will not be repeated here.

[0113] After the display driver component 302 performs dimming processing on the subtitle area and the first target area of ​​the first picture, it can control the light source component 304 and the control light modulation component 303 to realize the display of the second picture according to the image data after the dimming processing of the first picture.

[0114] In a possible implementation, the display driving component 302 may send a synchronization signal to the laser driving component 305 according to the image data after dimming processing, and send a display driving signal to the light modulation component 303 according to the target image data.

[0115] Furthermore, after receiving the synchronization signal, the laser driving component 305 can generate a light source driving signal according to the synchronization signal and send the light source driving signal to the light source component 304 to drive the light source component 304 to light up and emit primary color light. The light source driving signal can be transmitted according to the first timing.

[0116] In some embodiments, the synchronization signal includes an enable signal and a pulse-width modulation (PWM) signal. The enable signal can be a timing control signal, typically represented as X_EN, where X represents the abbreviation of different primary colors. The enable signal is used to coordinate the timing of the output of different color lights. The PWM signal is a square wave signal used to provide a current signal for lighting the light source assembly 304. The display driver assembly 302 can determine the enable signal and the PWM signal based on the image data after dimming processing.

[0117] The light source assembly 304 includes three-color lasers, such as red, green, and blue lasers. If the first timing sequence is an RGB cycle (i.e., a red-green-blue cycle, hereinafter R represents red light, G represents green light, and B represents blue light), the light source assembly 304 uses the three-color laser to emit three-color laser illumination beams in the order of red light, green light, and blue light.

[0118] When the light modulation component 303 receives the display driving signal, it controls the micromirrors in the light modulation component 303 to move or flip to a corresponding angle according to the display driving signal, modulates the primary color light emitted by the light source component 304 after being lit and transmitted by the optical engine 306, and displays the second picture.

[0119] In some embodiments, the display driving signal may be transmitted according to a second timing sequence. For example, if the second timing sequence is an RGB cycle, the light modulation component 303 displays the second image in the order of red light, green light, and blue light.

[0120] In one possible implementation, after receiving the video signal, the display driver component 302 can determine the display quality requirements based on the video signal, and then determine the second timing based on the display quality requirements, and generate a display driver signal based on the specific partitioning of the light modulation component 303 and the bit range of each primary color pixel.

[0121] In some embodiments, the display driver component 302 further includes a memory for storing image data after the display driver component 302 performs dimming processing.

[0122] In the process of processing the image data in the received video signal, the display driver component 302 can process the pictures frame by frame. The rate at which the light modulation component 303 displays the pictures may be lower than the rate at which the display driver component 302 optimizes the pictures. The display driver component 302 can store the undisplayed pictures in the memory.

[0123] In some embodiments, the display driving signal may be a high-speed serial interface (HSSI) differential signal.

[0124] In some embodiments, the main control chip 301 may be a system on chip (SOC).

[0125] In some embodiments, the display driver component 302 may be a DLP.

[0126] In some embodiments, the light modulation component 303 may be a DMD.

[0127] In summary, during the image display process of the laser projection device provided in the embodiment of the present application, the main control chip identifies the first image to be displayed, extracts the position information of the subtitle area in the first image, and sends the position information of the subtitle area and the image data of the first image to the display driver component. In this way, when the display driver component optimizes the display effect of the first image, it can limit the scope of display effect optimization to a first target area excluding the subtitle area based on the position information of the subtitle area. This can effectively avoid the high brightness requirement of the subtitle area and the impact on the overall brightness of the image, thereby improving the image dimming effect and display effect.

[0128] Based on the laser projection device shown above, refer to Figure 7, which is a flow chart of a display method provided by an embodiment of the present application. This method can be applied to the laser projection device shown in Figure 3 or Figure 6 above. For example, it is implemented by the interaction between the main control chip 301 and the display driver component 302 in the laser projection device. The method may include the following steps:

[0129] Step 701: Obtain position information of the subtitle area in the first picture.

[0130] In a possible implementation, the laser projection device executes step 701 in response to a dimming instruction or upon detecting that a dimming mode is turned on.

[0131] Step 702: Determine a first target area based on the position information of the subtitle area. The first target area is an area in the first picture excluding the subtitle area.

[0132] Step 703 : Based on the first target area, perform dimming processing on the image data of the first frame, and display the second frame after the dimming processing.

[0133] In a possible implementation, based on the brightness of a plurality of first pixels in the first target area, if it is determined that the brightness of the first target area is less than a first brightness threshold, step 703 is performed.

[0134] The display method provided in the embodiment of the present application has similar implementation principles and technical effects to those of the embodiment shown in FIG3 , and will not be described in detail here.

[0135] Based on the laser projection device and display method shown above, in some application scenarios, the DLP end can also adjust the display screen of the laser projection device (for example, perform geometric correction, digital zoom, etc., adjust the size of the screen), display the screen or perform other user-related intelligent display adjustments.

[0136] Taking geometric correction as an example, after the DLP end receives the video signal transmitted by the main control chip, it will first decode the video signal, and then re-encode the decoded video signal and image information such as screen parameters and the coordinates of the geometric correction control points, and convert it into a video signal stream that matches the display area after geometric correction. It will then judge the frame-by-frame image content in the video signal stream and process the single-frame image information to achieve dynamic dimming processing.

[0137] In a scenario where the video signal transmitted by the main control chip contains the position information of the subtitle area, if the position information of the subtitle area is not processed and re-encoded through geometric correction, there will be differences between the coordinates of the border points in the video signal stream encoded after geometric correction. At this time, if the position information decoded by the main control chip is directly applied to the dynamic contrast processing, an error in the display area of ​​the dynamic contrast processing will occur (i.e., the target area for dimming processing may include the subtitle area), resulting in the failure of the dynamic dimming processing and poor display effect of the picture.

[0138] Based on this, an embodiment of the present application also provides another display method. When the laser projection device performs dimming processing on the display screen, if the main control chip determines that the laser projection device has turned on functions such as geometric correction to adjust the screen, the main control chip can map and correct the position information of the subtitle area in the video signal according to the position coordinates of the target area after the screen adjustment (i.e., the non-subtitle area), so that the target area determined according to the position information when the DLP performs dimming processing does not include the subtitle area, thereby improving the display effect of the screen.

[0139] Referring to FIG. 8 , FIG. 8 is a flow chart of another display method provided in an embodiment of the present application. Based on the laser projection device shown in FIG. 3 or FIG. 6 , the main control chip 301 is further configured to perform the following steps:

[0140] Step 801: Responding to a picture adjustment instruction, acquiring image data of a third picture; wherein the picture adjustment instruction is used to adjust the position of the display picture, and the third picture is the picture after the display position is adjusted;

[0141] The image adjustment instruction includes a geometric correction instruction and / or a focus adjustment instruction.

[0142] In a possible implementation, the third picture is a picture with the same content as the second picture, or a next frame picture adjacent to the second picture in the video stream. This embodiment of the present application does not impose any limitation on this.

[0143] That is, the third picture may be the same picture as the second picture, and the only difference is that the display areas of the contents of the two pictures are offset.

[0144] In a possible implementation, a difference between the brightness of the subtitle area in the third picture and the brightness of the subtitle area in the second picture is smaller than a second brightness threshold.

[0145] Step 802: Determine a second target area in the third picture, where the second target area is an area in the third picture excluding the subtitle area.

[0146] During the process of displaying the second picture, if the main control chip receives a picture adjustment instruction, in order to ensure that the dimming processing does not fail, the main control chip can determine the display area that needs to be dimmed after the picture adjustment processing based on the change relationship between the current display area and the display area after the picture adjustment, and dim the display area that needs to be dimmed through the display driver component, thereby avoiding the problem of deviation in the display area that needs to be dimmed due to picture adjustment, which makes the dimming processing invalid and affects the display effect.

[0147] As an example, as shown in Figure 9, the main control chip can determine the target area for dimming based on the position of the subtitle area. However, after the image is adjusted, the position of the target area will shift. If the target area is not adjusted and dimming is still performed according to the original position, the dimming area may include the subtitle area, causing the brightness of the subtitle area to be included in the dimming calculation process, resulting in calculation deviation, dimming failure, and poor display quality.

[0148] In a possible implementation, the process of the main control chip determining the second target area in the third picture may include the following steps S1-S2:

[0149] S1: Acquire a first display area and a third target area corresponding to the second picture, and a second display area corresponding to the third picture; the third target area is an area of ​​the second picture excluding the subtitle area.

[0150] The first display area is the display area before the picture is adjusted, and the second display area is the display area after the picture is adjusted.

[0151] The main control chip can determine the first display area and the second display area based on the screen parameters of the display area component when adjusting the picture (for example, the image parameters collected during geometric correction), and determine the third target area based on the position information of the subtitle area in the second picture.

[0152] S2: Determine a second target area based on the first display area, the third target area, and the second display area.

[0153] In a possible implementation, the main control chip determines the second target area by: acquiring a region mapping relationship between the first display area and the second display area; and mapping the third target area based on the region mapping relationship to obtain the second target area.

[0154] Taking geometric correction as an example, as shown in Figure 10, assuming that the coordinates of the first display area are (0, 0), (0, y), (x, 0), (x, y), and after geometric correction, there is an offset (x1, y1) in the x and y directions, then the coordinates of the second display area are (x1, y1), (x1, y2), (x2, y1), (x2, y2), where 0 <x1<x2<x;0<y1<y2<y。

[0155] Assume that the coordinates of the third target area in the second image are (x a ,y m )、(x a ,y n )、(x b ,y m )、(x b ,y n ), the coordinates of the second target area in the third screen are (x a ',y m ')、(x a ',y n ')、(x b ',y m ')、(x b ',y n '), since the size of the third target area is consistent with the size ratio of the second target area, the area coordinates of the third target area and the second target area have an area mapping relationship shown in the following formula (7).

[0156] From the above formula (7), it can be seen that the abscissa of the third target area and the abscissa of the second target area may have a first mapping relationship as shown in the following formula (8):

[0157] Among them, x i ' is the horizontal coordinate of the second target area, x i is the horizontal coordinate of the third target area.

[0158] From the above formula (7), it can be seen that the abscissa of the third target area and the abscissa of the second target area may have a second mapping relationship as shown in the following formula (9):

[0159] Among them, y i ' is the ordinate of the second target area, y iis the vertical coordinate of the third target area.

[0160] Based on the above logic, after determining the first mapping relationship between the horizontal coordinate of the first display area and the horizontal coordinate of the second display area, and the second mapping relationship between the vertical coordinate of the first display area and the vertical coordinate of the second display area, the main control chip maps the horizontal coordinate of the third target area based on the first mapping relationship to obtain the horizontal coordinate of the second target area, and maps the vertical coordinate of the third target area based on the second mapping relationship to obtain the vertical coordinate of the second target area.

[0161] As an example, the region coordinates of the second target region can be expressed by the following formula (10).

[0162] Step 803: Send the position information of the second target area and the image data of the third picture to the display driver component, so that the display driver component performs dimming processing on the image data of the third picture based on the second target area.

[0163] As an example, the location information of the second target area may be the area coordinates of the second target area.

[0164] It should be understood that the process of dimming processing performed by the display driving component is similar to that in the embodiment of FIG3 or FIG7 , and will not be described in detail here.

[0165] In one possible implementation, when dimming image data of the third image, the display driver component adjusts the second control current for displaying the second image to a third control current for displaying the third image, wherein a difference between the second control current and the third control current is less than a current threshold.

[0166] It should be understood that when dynamic dimming is performed on images in a geometrically corrected video stream, the dimming area is accurately determined based solely on the geometrically corrected coordinate offset. Therefore, the brightness of the dimming area and subtitle area after geometric correction is the same or similar to that before geometric correction. Accordingly, the second control current controlling the second image and the third control current controlling the third image are also the same or similar in magnitude.

[0167] To sum up, in the embodiment of the present application, after determining the area coordinates of the second target area, the main control chip can send the area coordinates of the second target display area and the image data of the third picture to the display driving component. When the display driving component performs dimming processing on the third picture, the dimming processing area is limited to the second target area, which solves the problem that when the picture after geometric correction is dynamically dimmed, the dynamic dimming area adjustment position caused by the change of the coordinates of the display area makes the dimming effect invalid, thereby improving the display effect.

[0168] Based on the laser projection device and display method shown above, the first picture, the second picture and the third picture can be the same frame picture in the same video signal / video source, that is, the contents of the first picture, the second picture and the third picture are the same, the only difference is that the first picture and the second picture have undergone dimming processing, the brightness of the first picture is different from the brightness of the second picture, and the second picture and the third picture have undergone picture adjustment (such as geometric correction), so that the areas where the laser projection device displays the second picture and the third picture are offset.

[0169] Next, taking the first picture, the second picture and the third picture as the same frame picture as an example, the display method provided in the embodiment of the present application is exemplarily described.

[0170] Referring to FIG. 11 , FIG. 11 is a flow chart of another display method provided in an embodiment of the present application. The display method can be applied to the laser projection device shown in FIG. 3 or FIG. 6 . The display method may include the following steps:

[0171] S1101: The main control chip receives the video stream.

[0172] S1102: The main control chip determines whether the dynamic dimming function is enabled. If enabled, step S1103 is executed; if not enabled, the process ends.

[0173] S1103: The main control chip determines whether the current video stream meets the dynamic dimming conditions. If the dynamic dimming conditions are met, step S1104 is executed; if not, step S118 can be executed.

[0174] The dynamic dimming condition is satisfied when: the video stream includes subtitles, and the brightness of the video is less than or equal to the target brightness.

[0175] S1104: The main control chip determines whether a geometric correction operation has been performed. If the geometric correction operation has been performed, step S1105 is executed; if the geometric correction operation has not been performed, step S1106 is executed.

[0176] S1105: The main control chip obtains the area coordinates of the first target area.

[0177] Among them, the first target area is the area in the historical display screen (for example, in the first screen) except the subtitle area. Among them, the implementation process of obtaining the first target area can refer to the implementation method in the embodiment shown in Figure 3 or Figure 8, and will not be repeated here.

[0178] S1106: The main control chip obtains the area coordinates of the second target area.

[0179] The second target area is an area excluding the subtitle area in the display area after geometric correction. For example, the second target area may be an area excluding the subtitle area in the third picture after geometric correction.

[0180] The step of obtaining the coordinates of the second target area can be referred to the implementation method in the embodiment shown in FIG8 , and will not be described in detail here.

[0181] S1107: The main control chip transmits the area coordinates of the first target area or the area coordinates of the second target area and the video stream to the display driver component.

[0182] S1108: The main control chip transmits the video stream to the display driver component.

[0183] S1109: The display driver component performs dimming processing on the image in the video stream.

[0184] It should be noted that the implementation principle and technical effects of the display method shown in FIG11 are similar to those of the embodiments shown in FIG3 , FIG7 and FIG8 , and are not described in detail here.

[0185] Based on the laser projection equipment and display method shown above, the display device involved in the embodiment of the present application is introduced below.

[0186] Referring to FIG. 12 , FIG. 12 is a schematic structural diagram of a display device provided in an embodiment of the present application. The display device may be included in the laser projection device provided in an embodiment of the present application. As shown in FIG. 12 , the display device includes:

[0187] A first acquisition module 1201 is configured to acquire position information of a subtitle area in a first picture;

[0188] A first determining module 1202 is configured to determine a first target area based on the position information of the subtitle area, where the first target area is an area in the first picture excluding the subtitle area;

[0189] The dimming processing module 1203 is configured to perform dimming processing on the image data of the first picture based on the first target area, and display the second picture after the dimming processing.

[0190] In a possible implementation, the dimming processing module 1203 includes:

[0191] A first acquiring unit, configured to acquire grayscale values ​​of a plurality of first pixels in a first target area based on image data of the first picture;

[0192] a gain determining unit, configured to determine the grayscale gains of the plurality of first pixel points based on the grayscale values ​​of the plurality of first pixel points;

[0193] The first dimming unit is configured to adjust the grayscale values ​​of the plurality of first pixel points based on the grayscale gains of the plurality of first pixel points.

[0194] In a possible implementation, the dimming processing module 1203 includes:

[0195] A second acquiring unit, configured to acquire brightness of a plurality of second pixels in the subtitle area based on the image data of the first picture;

[0196] The second dimming unit is configured to set the brightness of the plurality of second pixel points to a target brightness based on the brightness of the plurality of second pixel points.

[0197] In a possible implementation, the second dimming unit further includes:

[0198] The brightness determination subunit is configured to determine a target brightness according to the ambient brightness and / or the brightness of the plurality of first pixels.

[0199] In a possible implementation, the brightness determination subunit is specifically configured to:

[0200] Determining a first brightness based on ambient brightness and / or brightness of a plurality of first pixels;

[0201] Based on the first brightness, a target brightness is determined from a brightness candidate list; the brightness candidate list includes multiple second brightnesses, and the target brightness is the second brightness in the brightness candidate list with the smallest difference from the first brightness.

[0202] In a possible implementation, the brightness of the subtitle area in the second picture is smaller than the brightness of the subtitle area in the first picture.

[0203] In a possible implementation, the dimming processing module 1203 is further configured to:

[0204] The first control current for displaying the first picture is adjusted to the second control current for displaying the second picture; wherein the first control current is greater than the second control current.

[0205] In a possible implementation, the dimming processing module 1203 is further configured to:

[0206] Based on the image data of the first picture, obtaining the brightness of a plurality of first pixels in the first target area;

[0207] If it is determined based on the brightness of the plurality of first pixels that the brightness of the first target area is less than a first brightness threshold, dimming processing is performed on the image data of the first picture based on the first target area.

[0208] In a possible implementation, the first obtaining module 1201 is further configured to:

[0209] In response to a dimming instruction or detecting that a dimming mode is turned on, position information of a subtitle area in the first picture is obtained.

[0210] In a possible implementation, the display device further includes:

[0211] A second acquisition module is configured to acquire image data of a third picture in response to a picture adjustment instruction, wherein the picture adjustment instruction is used to adjust the position of the display picture, and the third picture is the picture after the display position is adjusted;

[0212] A second determining module is configured to determine a second target area in the third picture, where the second target area is an area in the third picture excluding the subtitle area;

[0213] The dimming processing module 1203 is further configured to perform dimming processing on the image data of the third picture based on the second target area.

[0214] In a possible implementation, the third picture is a picture with the same content as the second picture, or a next frame picture adjacent to the second picture in the video stream.

[0215] In a possible implementation, a difference between the brightness of the subtitle area in the third picture and the brightness of the subtitle area in the second picture is smaller than a second brightness threshold.

[0216] In a possible implementation, the image adjustment instruction includes a geometric correction instruction and / or a focus adjustment instruction.

[0217] In a possible implementation, the second determining module further includes:

[0218] an area determination unit, configured to obtain a first display area and a third target area corresponding to the second picture, and a second display area corresponding to the third picture; the third target area being an area of ​​the second picture excluding the subtitle area;

[0219] The area mapping unit is configured to determine the second target area based on the first display area, the third target area, and the second display area.

[0220] In a possible implementation, the region mapping unit is specifically configured to:

[0221] Acquire an area mapping relationship between the first display area and the second display area;

[0222] Based on the region mapping relationship, the third target region is mapped to obtain the second target region.

[0223] In one possible implementation, the area mapping relationship includes a first mapping relationship and a second mapping relationship, where the first mapping relationship is a mapping relationship between the abscissa of the first display area and the abscissa of the second display area, and the second mapping relationship is a mapping relationship between the ordinate of the first display area and the ordinate of the second display area; the area mapping unit is specifically configured to:

[0224] Mapping the horizontal coordinate of the third target area based on the first mapping relationship to obtain the horizontal coordinate of the second target area;

[0225] The vertical coordinate of the third target area is mapped based on the second mapping relationship to obtain the vertical coordinate of the second target area.

[0226] In a possible implementation, the dimming processing module 1203 is further configured to:

[0227] The second control current for displaying the second picture is adjusted to a third control current for displaying the third picture; and a difference between the second control current and the third control current is smaller than a current threshold.

[0228] To sum up, when the laser projection device is displaying an image, the display device can identify the first image to be displayed and extract the position information of the subtitle area in the first image. When optimizing the display effect of the first image, the display effect optimization range can be limited to the first target area other than the subtitle area based on the position information of the subtitle area. This can effectively avoid the high brightness requirement of the subtitle area and the impact on the overall brightness of the image, thereby improving the image dimming effect and display effect.

[0229] It should be noted that the display device provided in the above embodiment only uses the division of the above functional modules as an example to illustrate the dynamic dimming processing of the image projected and displayed by the laser projection device. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the display device provided in the above embodiment and the display method embodiments shown in Figures 7, 8, and 11 above are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0230] Refer to Figure 13, which is a schematic diagram of the hardware structure of the electronic device provided in an embodiment of the present application. The electronic device 1300 is used to implement the operations corresponding to the dimming processing module in any of the above-mentioned display method embodiments. The electronic device 1300 of this embodiment may include: a memory 1301 and a processor 1302.

[0231] Memory 1301, used for storing computer programs;

[0232] The processor 1302 is configured to execute the computer program stored in the memory to implement the display method in the above embodiment. For details, please refer to the relevant description in the above method embodiment.

[0233] In a possible implementation, the memory 1301 may be independent or integrated with the processor 1302 .

[0234] If the memory 1301 is a device independent of the processor 1302 , the electronic device 1300 may include: a bus 1303 for connecting the memory 1301 and the processor 1302 .

[0235] In one possible implementation, the electronic device 1300 may further include a communication interface 1304, which may be connected to the processor 1302 via the bus 1303. The processor 1302 may control the communication interface 1304 to implement the receiving and sending functions of the electronic device 1300.

[0236] An embodiment of the present application also provides a computer-readable storage medium, which stores a computer program or program instructions. When the computer program or program instructions are executed by a processor, the display method shown in any of the above method embodiments is implemented. The specific implementation method and technical effect are similar and will not be repeated here.

[0237] The computer-readable storage medium may include a USB flash drive, a mobile hard drive, a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc. The computer-readable storage medium may also be a non-volatile storage medium, in other words, a non-transient storage medium.

[0238] It should be understood that all or part of the steps for implementing the above embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the steps may be implemented in the form of a computer program product. The computer program product may include one or more computer instructions, which may be stored in the above-mentioned computer-readable storage medium.

[0239] That is, the embodiment of the present application also provides a computer program product. When the computer program product runs on a computer, the computer executes the display method described in the embodiment of the present application. The specific implementation method and technical effect are similar and will not be repeated here.

[0240] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, a person skilled in the art can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0241] The above description is an embodiment provided for this application and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A laser projection device, characterized in that: The laser projection device includes a main control chip and a display driver component; The main control chip is used to obtain position information of the subtitle area in the first picture, and send the image data of the first picture and the position information of the subtitle area to the display driving component; The display driving component is configured to determine a first target area based on the position information of the subtitle area, where the first target area is an area of ​​the first picture excluding the subtitle area; Based on the first target area, dimming processing is performed on the image data of the first picture, and the dimmed second picture is displayed based on the image data after the dimming processing.

2. The laser projection device according to claim 1, characterized in that: The display driver component is specifically used for: Based on the image data of the first picture, obtaining grayscale values ​​of a plurality of first pixels in the first target area; Determining grayscale gains of the plurality of first pixel points based on the grayscale values ​​of the plurality of first pixel points; The grayscale values ​​of the plurality of first pixel points are adjusted based on the grayscale gains of the plurality of first pixel points.

3. The laser projection device according to claim 2, characterized in that: The display driver component is specifically used for: Based on the image data of the first picture, obtaining brightness of a plurality of second pixels in the subtitle area; The brightness of the plurality of second pixel points is set as a target brightness based on the brightness of the plurality of second pixel points.

4. The laser projection device according to claim 3, characterized in that: The display driver component is further configured to: The target brightness is determined according to the ambient brightness and / or the brightness of the plurality of first pixels.

5. The laser projection device according to claim 4, characterized in that: The display driver component is specifically used for: Determining a first brightness based on the ambient brightness and / or the brightness of the plurality of first pixels; determining the target brightness from a brightness candidate list based on the first brightness; The brightness candidate list includes a plurality of second brightnesses, and the target brightness is the second brightness in the brightness candidate list that has the smallest difference with the first brightness.

6. The laser projection device according to any one of claims 1 to 5, characterized in that: The brightness of the subtitle area in the second picture is smaller than the brightness of the subtitle area in the first picture.

7. The laser projection device according to claim 6, characterized in that: The display driver component is further configured to: A first control current for displaying the first picture is adjusted to a second control current for displaying the second picture; wherein the first control current is greater than the second control current.

8. The laser projection device according to any one of claims 1 to 7, characterized in that: The display driver component is specifically used for: Based on the image data of the first picture, acquiring brightness of a plurality of first pixels in the first target area; If it is determined based on the brightness of the plurality of first pixels that the brightness of the first target area is less than a first brightness threshold, dimming processing is performed on the image data of the first picture based on the first target area.

9. The laser projection device according to any one of claims 1 to 8, characterized in that: The main control chip is specifically used for: In response to a dimming instruction or detecting that a dimming mode is turned on, the image data of the first picture and the position information of the subtitle area are sent to the display driving component.

10. The laser projection device according to any one of claims 1 to 9, characterized in that: The main control chip is also used for: In response to a picture adjustment instruction, image data of a third picture is acquired; wherein the picture adjustment instruction is used to adjust the position of the display picture, and the third picture is the picture after the display position is adjusted; determining a second target area in the third picture, where the second target area is an area in the third picture excluding a subtitle area; The position information of the second target area and the image data of the third picture are sent to the display driving component, so that the display driving component performs dimming processing on the image data of the third picture based on the second target area.

11. The laser projection device according to claim 10, characterized in that: The third picture is a picture with the same content as the second picture, or a next frame picture adjacent to the second picture in the video stream.

12. The laser projection device according to claim 10 or 11, characterized in that: A difference between the brightness of the subtitle area in the third picture and the brightness of the subtitle area in the second picture is less than a second brightness threshold.

13. The laser projection device according to any one of claims 10 to 12, characterized in that: The image adjustment instruction includes a geometric correction instruction and / or a focus adjustment instruction.

14. The laser projection device according to any one of claims 10 to 13, characterized in that: The main control chip is specifically used for: Acquire a first display area and a third target area corresponding to the second picture, and a second display area corresponding to the third picture; the third target area is an area of ​​the second picture excluding the subtitle area; The second target area is determined based on the first display area, the third target area, and the second display area.

15. The laser projection device according to claim 14, characterized in that: The main control chip is specifically used for: Acquire an area mapping relationship between the first display area and the second display area; Based on the area mapping relationship, the third target area is mapped to obtain the second target area.

16. The laser projection device according to claim 15, characterized in that: The area mapping relationship includes a first mapping relationship and a second mapping relationship, wherein the first mapping relationship is a mapping relationship between the horizontal coordinate of the first display area and the horizontal coordinate of the second display area, and the second mapping relationship is a mapping relationship between the vertical coordinate of the first display area and the vertical coordinate of the second display area; the main control chip is specifically used to: Performing mapping processing on the horizontal coordinate of the third target area based on the first mapping relationship to obtain the horizontal coordinate of the second target area; Mapping processing is performed on the vertical coordinate of the third target area based on the second mapping relationship to obtain the vertical coordinate of the second target area.

17. The laser projection device according to any one of claims 12 to 16, characterized in that: The display driver component is further configured to: The second control current for displaying the second picture is adjusted to a third control current for displaying the third picture; and a difference between the second control current and the third control current is smaller than a current threshold.

18. A display method, characterized in that: Applied to a laser projection device, the method comprises: Obtaining position information of the subtitle area in the first picture; determining a first target area based on the position information of the subtitle area, where the first target area is an area in the first picture excluding the subtitle area; Based on the first target area, dimming processing is performed on the image data of the first picture, and a second picture after the dimming processing is displayed.

19. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, which implements the method according to claim 18 when executed by a processor.

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