CN118714272A - Laser projection device and display method thereof - Google Patents

Abstract

The present invention discloses a laser projection device, a display method thereof and a readable storage medium. When displaying an image, a display mode matching the image to be displayed is determined; the determined display mode is used to display the image; wherein the display mode includes a first display mode and a second display mode; the white field brightness of the second display mode is greater than the white field brightness of the first display mode. Then, when the environment is dark and the influence of the ambient light on the projected image is small, the first display mode can be used to display the image so that the displayed image has higher color saturation and color accuracy. When the ambient light is bright and the ambient light makes the contrast of the projected image insufficient, the second display mode can be used to display the image so as to increase the brightness of the projected image and enhance the image contrast.

Description

Laser projection device and display method thereof

This application is a divisional application based on Chinese invention application 202210263421.8 (2022-03-17), invention name: Projection light source and projection equipment.

Technical Field

The present invention relates to the field of projection display technology, and in particular to a laser projection device, a display method thereof and a readable storage medium.

Background Art

With the popularity of laser display products, laser display products have begun to enter thousands of households as large-screen products to replace televisions. As a display product to replace televisions, the requirements for display effects such as brightness and color presentation are much higher than those of ordinary projection products.

Laser display products are affected by ambient light. If the ambient brightness is high, it will affect the display effect of laser display products. However, due to factors such as power consumption, laser life, and cost, it is difficult for current laser display products to achieve a relatively high level of brightness. In addition, how to balance brightness and display effect is also an urgent problem to be solved.

Summary of the invention

According to a first aspect of an embodiment of the present invention, a display method for a laser projection device is provided. When displaying an image, a display mode matching the image to be displayed is determined; the determined display mode is used for image display; wherein the display mode includes a first display mode and a second display mode; when the first display mode is used for image display, different types of lasers do not emit lasers at the same time; when the second display mode is used for image display, at least two lasers emit lasers at the same time during a set period of time. The white field brightness of the second display mode is greater than the white field brightness of the first display mode. Then, when the environment is dark and the influence of the ambient light on the projected image is small, the first display mode can be used for image display so that the displayed image has higher color saturation and color accuracy. When the ambient light is bright and the ambient light makes the contrast of the projected image insufficient, the second display mode can be used for image display to increase the brightness of the projected image and enhance the image contrast.

According to a second aspect of an embodiment of the present invention, a laser projection device is provided, comprising:

Laser light source device; the laser light device includes at least two types of lasers, and the colors of lasers emitted by different types of lasers are different;

The light valve modulation component is located at the light output side of the laser light source device; the light valve modulation component is used to modulate the incident light and then reflect it;

A projection lens is located on the reflection path of the light valve modulation component; the projection lens is used to image the output light of the light valve modulation component;

A processor is connected to the laser light source device and the light valve modulation component respectively; the processor is used to determine a display mode that matches the image to be displayed when displaying the image; and use the determined display mode to display the image;

Among them, the display mode includes a first display mode and a second display mode; when the first display mode is used for image display, different types of lasers do not emit lasers at the same time; when the second display mode is used for image display, at least two lasers emit lasers at the same time in a set time period.

The white field brightness of the second display mode is greater than the white field brightness of the first display mode. In the case where the environment is dark and the ambient light has little effect on the projected image, the first display mode can be used for image display to make the displayed image have higher color saturation and color accuracy. In the case where the ambient light is bright and the ambient light makes the projected image lack contrast, the second display mode can be used for image display to increase the brightness of the projected image and enhance the image contrast.

According to a third aspect of an embodiment of the present invention, a readable storage medium is provided, wherein the readable storage medium stores executable instructions of a laser projection device, and the executable instructions of the laser projection device are used to enable the laser projection device to execute the above-mentioned display method.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings introduced below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

FIG1 is a schematic diagram of the structure of a laser projection device provided by an embodiment of the present invention;

FIG2 is a flow chart of a display method of a laser projection device provided by an embodiment of the present invention;

FIG3 is a schematic diagram of a timing diagram of a laser provided by an embodiment of the present invention;

FIG4 is a second timing diagram of a laser provided in an embodiment of the present invention;

FIG5 is a second flowchart of a display method of a laser projection device provided by an embodiment of the present invention;

FIG. 6 is a grayscale distribution histogram provided by an embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described in conjunction with the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all explained using the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present invention. The drawings of the present invention are only used to illustrate the relative position relationship and do not represent the true proportion.

With the popularity of laser display products, laser display devices have begun to enter thousands of households as large-screen products to replace TVs. Laser projection display usually adjusts the three primary colors of light to alternately illuminate the same pixel position, and through the ratio of the three primary colors of light and the visual inertia of the human eye, a superimposed color effect can be seen.

FIG. 1 is a schematic diagram of the structure of a laser projection device provided by an embodiment of the present invention.

As shown in FIG. 1 , the laser projection device provided by the embodiment of the present invention includes: a laser light source device 10 , a light valve modulation component 20 , a projection lens 30 and a processor 40 .

In the embodiment of the present invention, the laser light source device 10 includes at least two types of lasers, and different types of lasers emit lasers of different colors.

In a specific implementation, the laser light source device 10 may include three lasers, namely a red laser for emitting red laser, a green laser for emitting green laser, and a blue laser for emitting blue laser, and the three lasers may form a laser array. In addition, the laser light source device 10 may also include an MCL laser, which includes a laser chip for emitting red laser, green laser, and blue laser, and may also realize the function of emitting three primary color lasers. In practical applications, different forms of lasers may be provided as required, and the embodiments of the present invention do not limit the specific type of laser.

The light valve modulation component 20 is located at the light output side of the laser light source device 10. The light valve modulation component 20 is used to modulate the incident light and then reflect it. In specific implementation, the light valve modulation component 20 can use a digital micromirror device (DMD for short). DMD is a reflective light valve device. The surface of DMD includes thousands of tiny mirrors. Each tiny mirror can choose to reflect light toward the projection lens or toward the light absorber. The longer the tiny mirror reflects light toward the projection lens, the greater the brightness of the pixel.

The projection lens 30 is located on the reflection path of the light valve modulation component 20, and is used to image the output light of the light valve modulation component 20. The output light modulated by the light valve modulation component 20 needs to be imaged by the projection lens 30 to project the image on the projection screen or at a set position, and the viewer can view the display image by viewing the projection screen.

The laser projection device provided by the embodiment of the present invention also includes a processor 40, which is respectively connected to the laser light source device 10 and the light valve modulator 20. On the one hand, the processor 40 can control the timing control signal to the laser light source device 10, thereby driving each laser in the laser light source device to emit laser according to the set timing; on the other hand, it can provide a driving signal to the light valve modulator 20, and the driving signal can specifically include information for controlling the flipping angle and duration of the tiny reflectors in the light valve modulator 20. When the light valve modulator 20 receives the driving signal sent by the processor 40, it can drive each tiny reflector according to the driving signal.

Laser projection equipment includes three-color lasers for emitting three-primary color lasers with a high color gamut and color saturation, which can achieve better color presentation effects. However, the images displayed by laser projection equipment will be affected by ambient light. Due to factors such as power consumption, laser life, and cost, the current maximum brightness of laser projection equipment is around 300nit. It still has a certain impact on the demonstration effect of most scenes demonstrated in bright environments, because the colors are relatively saturated. In colorful scenes, the demonstration picture is still relatively bright and vivid, but in the case of less colorful pictures with mostly white pictures, the brightness of 300nits is not bright enough. The display effect is better in darker environments, but if the environment is brighter, it will directly affect the viewing experience.

In view of this, an embodiment of the present invention provides a display method for a laser projection device, and different display modes can be selected as needed to optimize the image display effect.

FIG. 2 is a flow chart of a display method of a laser projection device provided by an embodiment of the present invention.

As shown in FIG. 2 , the display method of the laser projection device includes:

S10, when displaying an image, determining a display mode that matches the image to be displayed;

S20: Use the determined display mode to display images.

Among them, the display mode includes a first display mode and a second display mode; when the first display mode is used for image display, different types of lasers do not emit lasers at the same time; when the second display mode is used for image display, at least two lasers emit lasers at the same time in a set time period.

The display method of the laser projection device provided by the embodiment of the present invention provides two display modes, and the white field brightness of the second display mode is greater than the white field brightness of the first display mode. Then, when the environment is dark and the influence of the ambient light on the projected image is small, the first display mode can be used for image display so that the displayed image has higher color saturation and color accuracy. When the ambient light is bright and the ambient light makes the projected image lack of contrast, the second display mode can be used for image display to increase the brightness of the projected image and enhance the image contrast.

When displaying an image, red laser, green laser and blue laser need to be emitted separately in each frame period (the time for displaying one frame of image), and full-color display is achieved through color matching.

For the first display mode, for each frame period, the red laser, the green laser and the blue laser emit laser in sequence according to the set timing. When the red laser emits red laser, the green laser and the blue laser do not emit light; when the green laser emits green laser, the red laser and the blue laser do not emit light; when the blue laser emits blue laser, the red laser and the green laser do not emit light.

FIG. 3 is one of the timing diagrams of the laser provided in the embodiment of the present invention.

As shown in Figure 3, the frame period is regarded as T, and each frame period T includes t1 period, t2 period and t3 period. In the t1 period, the red laser emits red laser, in the t2 period, the green laser emits green laser, and in the t3 period, the blue laser emits blue laser. Among them, the brightness of the red laser accounts for 24.7%, the brightness of the green laser accounts for 68.7%, and the brightness of the blue laser accounts for 6.7%. Then the white field brightness is the sum of the red brightness, green brightness and blue brightness. If the white field brightness of the laser projection device is 300nit, R represents red laser, G represents green laser, and B represents blue laser, then the brightness of lasers of different colors is shown in the following table:

color Brightness (nit) Brightness ratio R 74 24.7% G 206 68.7% B 20 6.7% R+G+B 300 100.0% W 300 100.0%

In the embodiment of the present invention, in the first display mode, the red laser, the green laser and the blue laser emit lasers in sequence in each frame period, and the ratio of the red laser, the green laser and the blue laser in each frame period meets the requirements of the color coordinates. Therefore, when the first display mode is used for image display, the chromaticity, saturation and color accuracy of the displayed image are good, and the color reproduction ability is strong. The first display mode is suitable for scenes with low display brightness requirements and high color accuracy requirements.

For the second display mode, for each frame period, any two of the red laser, the green laser and the blue laser emit laser light simultaneously in a set period, thereby increasing the white field brightness, but at the expense of a certain degree of color reproduction capability.

Specifically, in an embodiment of the present invention, on the basis that the red laser, the green laser and the blue laser emit laser light separately, each frame period also includes a first set period, a second set period and a third set period; in the first set period, the red laser and the green laser emit laser light at the same time, in the second set period, the green laser and the blue laser emit laser light at the same time, and in the third set period, the blue laser and the red laser emit laser light at the same time.

FIG. 4 is a second timing diagram of a laser provided in an embodiment of the present invention.

As shown in Fig. 4, the frame period is regarded as T, and each frame period T includes t1 period, t12 period, t2 period, t23 period, t3 period and t31 period. Among them, t12 period is the first setting period, t23 period is the second setting period, and t31 period is the third setting period.

During the t1 period, the red laser emits red laser, during the t12 period, the red laser and the green laser simultaneously emit red laser and green laser, during the t2 period, the green laser emits green laser, during the t23 period, the green laser and the blue laser simultaneously emit green laser and blue laser, during the t3 period, the blue laser emits blue laser, and during the t31 period, the blue laser and the red laser simultaneously emit blue laser and red laser.

In the second display mode, the time when the red laser, green laser and blue laser emit laser separately is shortened, and the time period when the two lasers emit laser simultaneously is increased. In this way, the two lasers emit laser simultaneously during the time period when originally only one laser emits laser. This can increase the brightness of the light source, but the brightness ratio when only one color laser is emitted is reduced.

Compared with the first display mode, the brightness of the red laser is reduced from 24.7% to 16.5%, the brightness of the green laser is reduced from 68.7% to 49.5%, and the brightness of the blue laser is reduced from 6.7% to 5.0%. However, the white field brightness can be increased from the original 300nit to 370nit. If R represents red laser, G represents green laser, and B represents blue laser, the brightness of lasers of different colors is shown in the following table:

color Brightness (nit) Brightness ratio R 61 16.5% G 183 49.5% B 18.5 5.0% R+G+B 268 70.9% W 370 100.0%

As can be seen from the table above, when the second display mode is used, although the white field brightness is increased from 300nit to 370nit, the brightness of the red laser is reduced from 74nit to 61nit, the brightness of the green laser is reduced from 206nit to 183nit, and the brightness of the blue laser is reduced from 20nit to 18.5nit. This means that when the second display mode is used for image display, the overall brightness of the picture will increase significantly, but it will also cause a loss of effect on some parts of the picture. For example, the brightness of the picture dominated by color will be reduced and the picture will be slightly dim, while the white part of the picture with a large number of white scenes will be brighter, and the saturation of the colored part will also be lost. Therefore, the second display mode is more suitable for scenes with higher overall image brightness requirements, more white scenes in the picture, and lower requirements for the color performance of the picture.

Considering the problem of mutual restriction between white field brightness and color reproduction ability, if too much time is added in a frame period so that at least two colors of lasers emit lasers at the same time, the white field brightness will be improved more obviously. However, since the brightness of the separately emitted red laser, green laser and blue laser in an image frame accounts for a low proportion, the color reproduction ability of the entire picture will be poor, and the color scene in the image will be displayed dimly. If the time period increased in a frame period so that at least two colors of lasers emit lasers at the same time is too short, the white field brightness will not be significantly improved, and the demand for image display under strong ambient light conditions cannot be met. Therefore, weighing the two reasons of white field brightness and color reproduction ability, the sum of the brightness of the separately emitted lasers of the red laser, green laser and blue laser in a frame period in the embodiment of the present invention accounts for 50% to 75% of the total brightness of the emitted lasers in a frame period. It is ensured that the white field brightness is improved without losing too much color expression ability.

The parameter that reflects the color reproduction ability is usually color standard, that is, color accuracy, which is generally expressed as ΔE. ΔE reflects the gap between the displayed color and the standard value. Therefore, the smaller the ΔE value, the stronger the color reproduction ability, and the larger the ΔE, the more distorted the color. ΔE is usually determined by chromaticity, saturation, and brightness. The basis for calculating its standard value is that the sum of the brightness of the separate red light, green light, and blue light is equal to the white field brightness. In the first display mode, the sum of the brightness of the red laser, green laser, and blue laser is equal to the white field brightness. Therefore, in this display mode, ΔE is small and the color reproduction ability is good. In the second display mode, due to the decrease in the proportion of the brightness of the red laser, green laser, and blue laser, the ΔE value will be larger and the overall color reproduction ability will be weaker.

In order to improve this problem, the embodiment of the present invention further adjusts the brightness of some grayscale intervals when the second display mode is used to display images.

FIG. 5 is a second flowchart of the display method of the laser projection device provided in an embodiment of the present invention.

As shown in FIG. 2 , when the second display mode is adopted to display an image, the method further includes:

S201, detecting the average brightness of the image to be displayed;

S202, determining the grayscale corresponding to the average brightness of the image to be displayed according to a predetermined correspondence relationship between brightness and grayscale;

S203, judging whether the determined grayscale is greater than the grayscale threshold; when the determined grayscale is greater than the grayscale threshold, executing step S204; when the determined grayscale is less than or equal to the grayscale threshold, executing step S205;

S204, calling the original brightness curve to display the image;

S205: Call the first brightness curve to display an image.

The brightness corresponding to the first brightness curve in the preset grayscale range is greater than the brightness corresponding to the original brightness network cable in the preset grayscale range.

The brightness curve in the embodiment of the present invention can be understood as a gamma curve configured in the laser projection device. When displaying images, the displayed images of different scenes can be driven according to the corresponding brightness curve.

When the second display mode is used for image display, the overall brightness of the displayed image is determined by setting the grayscale threshold. When the grayscale corresponding to the average brightness of the displayed image is greater than the grayscale threshold, it means that the proportion of white images in the displayed image is relatively high. In this case, no additional adjustment is required to the displayed image, and the original brightness curve can be called for image display. When the grayscale corresponding to the average brightness of the displayed image is less than or equal to the grayscale threshold, it means that the proportion of white images in the displayed image is relatively low, and the color image is the main part. At this time, the brightness of the color image part needs to be increased, so the first brightness curve is called for image display, so that the color image in the displayed image is brighter.

FIG. 6 is a grayscale distribution histogram provided by an embodiment of the present invention.

As shown in Figure 6, s represents the original brightness curve, and s1 represents the first brightness curve. The first brightness curve s1 has a higher brightness in the preset grayscale range than the original brightness curve s, that is, when the first brightness curve is called to display an image, the display brightness in the preset grayscale range is higher, which can make the core image in the displayed image brighter.

In specific implementation, the above-mentioned preset grayscale interval is an empirical value, which corresponds to the grayscale at the middle level in the grayscale of 0~255. In an embodiment of the present invention, the grayscale interval can correspond to grayscale 60~170. Since the human eye is not sensitive to the brightness change in the high grayscale interval, but is more sensitive to the brightness and color change in the middle and low grayscale intervals, when the grayscale corresponding to the average brightness of the image to be displayed is less than or equal to the grayscale threshold, the first brightness curve can be called to increase the brightness of grayscale 60~170, and increase the overall brightness of the middle grayscale interval in the display image, so that the colors in the display image are more vivid, the layering is richer, and the display effect is optimized.

In addition, the grayscale threshold is an empirical value, which can be obtained by performing multiple detections when the laser projection device is displaying an image, or can be set according to the type of the image currently to be displayed. In an embodiment of the present invention, the grayscale threshold can be set within the range of 144 grayscales to 216 grayscales, and the specific value can be selected according to actual needs, which is not limited here.

The laser projection device provided by the embodiment of the present invention can use different display modes to display images according to different display scenes. How to determine the display mode that matches the image to be displayed can be achieved through various ways.

In some embodiments, the user can usually control the laser projection device to display images through a control device. Then the user can select a display mode according to the program he wants to watch and his own preferences. At this time, the laser projection device can receive the control instruction of the display mode sent by the user through the remote control device, and use the display mode selected by the user to display the image. When the first display mode is used, the color reproduction ability is strong, and the colors in the picture are brighter and more saturated; when the second display mode is used, the overall brightness of the displayed image is greater.

In some embodiments, the laser projection device can automatically identify the type of the currently displayed image. For example, when the laser projection device is playing a movie, it can be identified that the currently displayed image is a movie, which is usually watched in a darker environment, so it is more inclined to use the first display mode for image display to show the colors in the picture, with a higher color reproduction ability. When the laser projection device is playing a TV program, it can be identified that the currently displayed image is a program, which is usually watched in a bright environment, so it is more inclined to use the second display mode for image display to increase the overall brightness of the displayed image and improve the image contrast.

In some embodiments, the display mode can be selected according to the current ambient light brightness. Specifically, a brightness threshold is first set to determine the current ambient brightness. When the determined ambient brightness is less than the preset brightness threshold, it means that the current environment is dark, so the first display mode can be used for image display to make the colors in the displayed image saturated and bright. When the determined ambient brightness is greater than or equal to the preset brightness threshold, it means that the current environment is bright, so the second display mode can be used for image display to increase the overall brightness of the displayed image and improve the image contrast.

The embodiments of the present invention only illustrate several ways to select display modes. In specific implementation, the display mode can be determined in any of the above ways or other ways that can optimize the display effect, which is not limited here.

Another aspect of the embodiments of the present invention provides a laser projection device. The structure of the laser projection device can be seen in FIG. 1 , and specifically includes: a laser light source device 10 , a light valve modulation component 20 , a projection lens 30 and a processor 40 .

The laser light source device 10 includes at least two types of lasers, and the colors of lasers emitted by different types of lasers are different. In a specific implementation, it can include a red laser, a green laser, and a blue laser. The light valve modulation component 20 is located on the light-emitting side of the laser light source device 10, and the light valve modulation component 20 is used to modulate the incident light and then reflect it. In a specific implementation, the light valve modulation component 20 can use a DMD. The projection lens 30 is located on the reflection path of the light valve modulation component 20, and the projection lens 30 is used to image the output light of the light valve modulation component 20. The processor 40 is connected to the laser light source device 10 and the light valve modulation component 20 respectively, and the processor 40 is used to determine the display mode matching the image to be displayed when displaying an image; and use the determined display mode to display the image; wherein the display mode includes a first display mode and a second display mode; when the first display mode is used to display an image, different types of lasers do not emit lasers at the same time; when the second display mode is used to display an image, at least two lasers emit lasers at the same time during a set period.

The laser projection device provided by the embodiment of the present invention can use two display modes for image display, and the white field brightness of the second display mode is greater than the white field brightness of the first display mode. Then, when the environment is dark and the influence of the ambient light on the projected image is small, the first display mode can be used for image display to make the displayed image have higher color saturation and color accuracy. When the ambient light is bright and the ambient light makes the projected image lack of contrast, the second display mode can be used for image display to increase the brightness of the projected image and enhance the image contrast.

In some embodiments, the processor 40 is specifically configured to receive a display mode control instruction sent by a user via a remote control device; and determine a display mode of an image to be displayed according to the display mode control instruction.

In some embodiments, the processor 40 is specifically configured to determine a matching display mode according to the type of the currently displayed image.

In some embodiments, the processor 40 is specifically used to determine the current ambient brightness; when the determined ambient brightness is less than a preset brightness threshold, the first display mode is used for image display; when the determined ambient brightness is greater than or equal to the preset brightness threshold, the second display mode is used for image display.

Furthermore, the processor 40 is also used to detect the average brightness of the image to be displayed when the second display mode is used for image display; determine the grayscale corresponding to the average brightness of the image to be displayed according to a predetermined correspondence between brightness and grayscale; when the determined grayscale is greater than the grayscale threshold, call the original brightness curve for image display; when the determined grayscale is less than or equal to the grayscale threshold, call the first brightness curve for image display.

The brightness of the first brightness curve in the preset grayscale range is greater than the brightness of the original brightness network cable in the preset grayscale range. The preset grayscale range is 60 grayscale to 170 grayscale. The grayscale threshold is 144 grayscale to 216 grayscale.

An embodiment of the present invention further provides a readable storage medium, which stores executable instructions of a laser projection device, and the executable instructions of the laser projection device are used to enable the laser projection device to execute any of the above-mentioned display methods.

Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (12)

1. The display method of the laser projection device is characterized in that the laser projection device comprises a red laser, a green laser and a blue laser which are respectively used for emitting red laser, green laser and blue laser;

Receiving a control instruction of a display mode sent by a user through remote control equipment;

displaying the image according to the control instruction of the display mode;

wherein the display modes include a first display mode and a second display mode;

In one frame period, in the first display mode and the second display mode, the red laser, the green laser and the blue laser are all lighted at different time, and the laser is emitted in sequence according to a set time sequence;

In one frame period, the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the second display mode to the white brightness in the second display mode is smaller than the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the first display mode to the white brightness in the first display mode,

And the color accuracy in the first display mode is greater than the color accuracy in the second display mode.

2. The display method of claim 1, wherein the white field luminance in the first display mode is less than the white field luminance in the second display mode.

3. The display method according to claim 1, wherein the white field luminance in the first display mode is a sum of luminances of the blue laser light, the green laser light, and the blue laser light emitted separately.

4. The display method according to claim 1, wherein in the second display mode, the sum of the brightnesses of the red laser, the green laser, and the blue laser emitted individually accounts for 50% to 75% of the total brightness of the emitted laser in one frame period.

5. The display method according to claim 1, wherein a sum of time periods of separate emission of the red laser light, the green laser light, and the blue laser light in the first display mode is greater than a sum of time periods of separate emission of the red laser light, the green laser light, and the blue laser light in the second display mode in one frame display period.

6. The display method according to claim 1, wherein image display is performed in the second display mode, further comprising:

detecting the average brightness of an image to be displayed;

determining the gray scale corresponding to the average brightness of the image to be displayed according to the corresponding relation between the predetermined brightness and the gray scale;

when the gray level is determined to be larger than a gray level threshold value, calling an original brightness curve to display an image;

When the gray level is smaller than or equal to the gray level threshold value, a first brightness curve is called for image display;

the brightness corresponding to the first brightness curve in the preset gray scale interval is greater than the brightness corresponding to the original brightness network line in the preset gray scale interval.

7. The display method of claim 1, wherein the first luminance profile is a gamma profile configured in the laser projection device.

8. The display method according to claim 1, wherein the color accuracy is determined by chromaticity, saturation, and luminance together for reflecting a difference between the display color and a standard value.

9. The display method of the laser projection device is characterized in that the laser projection device comprises a red laser, a green laser and a blue laser which are respectively used for emitting red laser, green laser and blue laser;

Receiving a control instruction of a display mode sent by a user through remote control equipment;

displaying the image according to the control instruction of the display mode;

wherein the display modes include a first display mode and a second display mode;

In a frame display period, the sum of the time periods of respectively and independently emitting red laser, green laser and blue laser in the first display mode is larger than the sum of the time periods of respectively and independently emitting red laser, green laser and blue laser in the second display mode;

The ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the second display mode to the white field brightness in the second display mode is smaller than the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the first display mode to the white field brightness in the first display mode, and the white field brightness in the first display mode is smaller than the white field brightness in the second display mode.

10. A display method of laser projection equipment is characterized in that,

Determining the current ambient brightness;

When the determined ambient brightness is smaller than a preset brightness threshold value, adopting the first display mode to display images;

When the determined ambient brightness is greater than or equal to a preset brightness threshold, adopting the second display mode to display images;

wherein the display modes include a first display mode and a second display mode;

In one frame period, in the first display mode and the second display mode, the red laser, the green laser and the blue laser are all lighted at different time, and the laser is emitted in sequence according to a set time sequence;

In one frame period, the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the second display mode to the white brightness in the second display mode is smaller than the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the first display mode to the white brightness in the first display mode,

And the color accuracy in the first display mode is greater than the color accuracy in the second display mode.

11. A laser projection device, comprising:

the laser light source comprises a red laser, a green laser and a blue laser and is used for emitting red laser, green laser and blue laser respectively;

A light valve modulation part positioned at the light emitting side of the laser light source device; the light valve modulation component is used for modulating and reflecting incident light rays;

A projection lens positioned on the reflection path of the light valve modulation component; the projection lens is used for imaging emergent light of the light valve modulation component;

a processor connected to the laser light source device and the light valve modulation unit, respectively; the processor is used for determining a display mode matched with an image to be displayed when the image is displayed; adopting the determined display mode to display the image;

wherein the display modes include a first display mode and a second display mode; in one frame period, in the first display mode and the second display mode, the red laser, the green laser and the blue laser are all lighted at different time, and the laser is emitted in sequence according to a set time sequence;

In one frame period, the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the second display mode to the white brightness in the second display mode is smaller than the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the first display mode to the white brightness in the first display mode,

And the color accuracy in the first display mode is greater than the color accuracy in the second display mode.

12. A laser projection device, comprising:

the laser light source comprises a red laser, a green laser and a blue laser and is used for emitting red laser, green laser and blue laser respectively;

A light valve modulation part positioned at the light emitting side of the laser light source device; the light valve modulation component is used for modulating and reflecting incident light rays;

A projection lens positioned on the reflection path of the light valve modulation component; the projection lens is used for imaging emergent light of the light valve modulation component;

a processor connected to the laser light source device and the light valve modulation unit, respectively; the processor is used for determining a display mode matched with an image to be displayed when the image is displayed; adopting the determined display mode to display the image;

wherein the display modes include a first display mode and a second display mode;

In a frame display period, the sum of the time periods of respectively and independently emitting red laser, green laser and blue laser in the first display mode is larger than the sum of the time periods of respectively and independently emitting red laser, green laser and blue laser in the second display mode;

The ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the second display mode to the white brightness in the second display mode is smaller than the ratio of the sum of the brightness of the red laser, the green laser and the blue laser in the first display mode to the white brightness in the first display mode, and the white brightness in the first display mode is smaller than the white brightness in the second display mode.