Display device and control method

Abstract

The invention discloses a display device and a control method, and the display device comprises an image output unit which is used for outputting an image; the light-emitting unit is used for outputting a light set to support the image output unit to output an image; the control unit is used for determining that the target pixel points in the image pass through the first detection and constructing a candidate pixel point set; the first detection is used for detecting whether the proportion of the number of the target pixel points in the image meets a first set proportion threshold value or not; the difference between the brightness values of the pixel points in the candidate pixel point set is within a set difference threshold range; the brightness value of the target pixel point meets a set brightness threshold value; determining that the candidate pixel point set does not pass the second detection, and controlling the light set output by the light emitting unit to be switched from the first brightness value to a second brightness value; the second detection is used for detecting whether the distribution of the pixel points in the candidate pixel point set is concentrated or not and presenting an identifiable contour; the second brightness value is smaller than the first brightness value.

Description

Technical Field

[0001] The present application relates to the field of computer technology, and in particular to a display device and a control method. Background Art

[0002] In the field of display technology, the overall power consumption of display devices can be reduced through software-level optimization. However, in such software low-power solutions, visual anomalies (such as screen flickering and local brightness mutations) often occur due to improper backlight modulation, resulting in poor user experience of display devices. Summary of the invention

[0003] The technical solutions provided by this application are as follows:

[0004] A first aspect of the present application provides a display device, including:

[0005] An image output unit, used for outputting images;

[0006] a light emitting unit, configured to output a light set to support the image output unit in outputting the image;

[0007] Control unit for:

[0008] Determine that the target pixel in the image passes the first detection and constructs a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets a first set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel set is within a set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold;

[0009] Determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit to switch from the first brightness value to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

[0010] The display device further includes:

[0011] a light modulation unit, disposed in the optical path between the light emitting unit and the image output unit, for modulating the light set output by the light emitting unit and projecting the modulated light set to the image output unit;

[0012] The control unit is also used to control the light modulation unit to switch from a first light transmittance parameter to a second light transmittance parameter when the light set output by the light-emitting unit is switched from a first brightness value to a second brightness value, so that the light modulation unit modulates the light set output by the light-emitting unit based on the second light transmittance parameter; the transmittance of the light modulation unit represented by the second light transmittance parameter is higher than the transmittance of the light modulation unit represented by the first light transmittance parameter.

[0013] Another aspect of the present application provides a control method, comprising:

[0014] Determine that the target pixel in the image passes the first detection and constructs a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets a set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel set is within a set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold;

[0015] Determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit of the display device to switch from a first brightness value to a second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

[0016] The determining that the candidate pixel set fails the second detection includes any one of the following:

[0017] Determining that the distribution of the pixels in the candidate pixel set does not form a regular contour;

[0018] It is determined that the distribution of the pixel points of the candidate pixel point set forms a regular contour, and the proportion of the regular contour in the image does not exceed a second set proportion threshold.

[0019] Before determining that the target pixel in the image passes the first detection, the method further includes:

[0020] Determining that the number of the image and multiple frames of images before the image meets a preset frame quantity, and determining a target parameter based on multiple frames of continuous images that meet the preset frame quantity; the target parameter represents a rate of change of image content;

[0021] Based on the target parameter, determining a theoretical adjustment amount of the brightness value of a set of light rays output by a light-emitting unit of a display device;

[0022] The controlling the light set output by the light emitting unit of the display device to switch from a first brightness value to a second brightness value includes:

[0023] The first brightness value of the light set output by the light emitting unit is reduced based on the brightness value theoretical adjustment amount to switch to a second brightness value.

[0024] The preset frame amount is obtained by:

[0025] The preset frame quantity is determined according to the refresh rate of the display device and the preset image acquisition time window length.

[0026] The step of determining a theoretical adjustment amount of brightness value of a set of light rays output by a light emitting unit of a display device based on the target parameter includes:

[0027] Determining that the target parameter is greater than a set parameter threshold, selecting the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is less than the second ratio;

[0028] Determining that the target parameter is not greater than the set parameter threshold, and selecting the second ratio from the first ratio and the second ratio as the adjustment ratio;

[0029] Based on the adjustment ratio and the first brightness value, a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined.

[0030] The control method further comprises:

[0031] Determining that the number of the image and the number of multiple frames of images before the image does not meet the preset frame quantity, selecting the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is smaller than the second ratio;

[0032] Based on the adjustment ratio and the first brightness value, a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined.

[0033] The step of reducing the first brightness value of the light set output by the light emitting unit based on the brightness value theoretical adjustment amount to switch to a second brightness value includes:

[0034] Based on the theoretical adjustment amount of the brightness value, determining an actual adjustment amount of the brightness value; the actual adjustment amount of the brightness value is less than the theoretical adjustment amount of the brightness value;

[0035] The first brightness value is reduced based on the actual adjustment amount of the brightness value to switch to the second brightness value.

[0036] After the light set output by the light emitting unit is controlled to switch from the first brightness value to the second brightness value, the method further includes:

[0037] Controlling a light modulation unit of a display device to switch from a first light transmission parameter to a second light transmission parameter; the light transmittance of the light modulation unit represented by the second light transmission parameter is higher than the light transmittance of the light modulation unit represented by the first light transmission parameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0039] Figure 1 A schematic diagram of the structure of a display device provided in this application;

[0040] Figure 2 Another structural schematic diagram of a display device provided by the present application;

[0041] Figure 3 A schematic flow chart of a control method provided in Example 3 of the present application;

[0042] Figure 4 A schematic flow chart of a control method provided in Example 4 of the present application;

[0043] Figure 5 A schematic flow chart of a control method provided in Example 5 of the present application;

[0044] Figure 6 A schematic flow chart of a control method provided in Example 7 of the present application;

[0045] Figure 7 A schematic flow chart of a control method provided in Example 9 of the present application;

[0046] Figure 8 Another schematic flow chart of a control method provided in Example 9 of the present application;

[0047] Fig. 9 A flow chart of a control method provided in Example 10 of the present application. DETAILED DESCRIPTION

[0048] The following describes the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. The terms used in the implementation method section of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0049] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0050] The terms "first", "second", etc. in the specification of the application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0051] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0052] Reference Figure 1 , is a schematic diagram of the structure of a display device provided in Example 1 of the present application, such as Figure 1 As shown, the display device may include but is not limited to:

[0053] The image output unit 100 is used to output an image.

[0054] The light emitting unit 200 is used to output a light set to support the image output unit 100 to output the image.

[0055] The light emitting unit 200 can output a set of light rays to provide backlight illumination for an image so that the image can be recognized by a user.

[0056] The control unit 300 is used for:

[0057] Determine the target pixel in the image through the first detection and construct a set of candidate pixels;

[0058] It is determined that the candidate pixel set fails the second detection, and the light set output by the light emitting unit is controlled to switch from a first brightness value to a second brightness value; the second brightness value is less than the first brightness value.

[0059] The first detection can be used to detect whether the proportion of the number of target pixels in the image meets a first set proportion threshold. The first set proportion threshold can be set as needed and is not limited in this application.

[0060] The proportion of the number of target pixels in the image satisfies the first set proportion threshold, which may include but is not limited to: the proportion of the number of target pixels in the image is not greater than the first set proportion threshold. If the proportion of the number of target pixels in the image satisfies the first set proportion threshold, it means that the target pixel passes the first detection.

[0061] In this embodiment, constructing a candidate pixel point set may include but is not limited to:

[0062] For each pixel in the image, calculate the brightness difference between it and the surrounding pixels. When calculating the brightness difference, it can be achieved by comparing the grayscale values ​​between the pixels.

[0063] From each pixel in the image, the pixels whose brightness difference is within the set difference threshold range are screened. The screened pixels can form a candidate pixel set. The difference threshold range can be set as needed and is not limited in this application.

[0064] The difference between the brightness values ​​of the pixels in the candidate pixel set may be within a set difference threshold range.

[0065] The brightness value of the target pixel can meet the set brightness threshold. The set brightness threshold can be set as needed and is not limited in this application. The brightness value of the target pixel can meet the set brightness threshold and may include but is not limited to: the brightness value of the target pixel is higher than the set brightness threshold.

[0066] The second detection may be used to detect whether the distribution of the pixels in the candidate pixel set is concentrated and presents a recognizable outline.

[0067] If the candidate pixel set passes the second test, it can be considered that the image area composed of the candidate pixel set has a spatial coherence, and the image area has a clear boundary and is easily recognized by the human eye. If the overall display brightness of the image is reduced by reducing the brightness value of the light set output by the light-emitting unit 200 of the display device, the change in the brightness value of the pixel points of this relatively significant and complete image area will remain relatively consistent due to the similar brightness values ​​of its pixel points. This consistent change makes the brightness value of the image area form a more obvious contrast compared with other areas, so that the change in its brightness is more easily perceived by the user.

[0068] On the contrary, if the candidate pixel set fails the second test, it means that there is no such significant and complete specific image area in the image. In this case, since there is no prominent and easily identifiable area in the image, even if the brightness value of the light set output by the light emitting unit 200 of the display device is reduced, the brightness change of each area will not be particularly prominent, and the user is likely not to noticeably feel the change in overall brightness, thereby reducing the visual interference or discomfort that may be caused by the adjustment of the brightness value of the light set.

[0069] In this embodiment, the control unit 300 can determine whether the number of overbright pixels in the image is small through the first detection. This step is crucial because if there are many overbright pixels in the image, when the backlight brightness is reduced, the brightness change of these bright spots will be relatively obvious and easily noticed by the user, causing visual interference or discomfort.

[0070] After confirming that there are few over-bright pixels in the image, the control unit 300 further constructs a candidate pixel set, which may be composed of pixels with similar brightness values ​​in the image. The reason for selecting pixels with similar brightness values ​​is that in an image, areas that are easily recognized by the human eye usually have similar brightness values, forming visual coherence.

[0071] By constructing a set of candidate pixel points, the control unit 300 can perform a second test on the set to determine whether the distribution of these pixel points is concentrated and whether a recognizable outline is formed. If the candidate pixel point set fails the second test, it means that these pixels with similar brightness do not form a prominent and easily recognizable area in the image. This means that when the control unit 300 reduces the brightness value of the light set output by the light-emitting unit 200, the reduction in the brightness value of the light set will not cause the brightness change in certain areas to be particularly prominent, and the user may not obviously feel the change in overall brightness.

[0072] This method of adjusting the brightness value of a light set can effectively reduce the power consumption of the display device while reducing visual interference or discomfort to the user, thereby improving the user's experience of using the display device.

[0073] As another optional embodiment of the present application, refer to Figure 2 , is a structural schematic diagram of a display device provided in Example 2 of the present application, such as Figure 2 As shown, based on the display device introduced in Embodiment 1, the display device may further include: a light modulation unit 400 .

[0074] The light modulation unit 400 is disposed in the optical path between the light emitting unit 200 and the image output unit 100 , and is used to modulate the light set output by the light emitting unit 200 , and project the modulated light set to the image output unit 100 .

[0075] In this embodiment, the light modulation unit 400 may include but is not limited to: a liquid crystal structure. The liquid crystal structure may change the transmittance of a light set by adjusting the molecular arrangement direction.

[0076] The control unit 300 is also used to control the light modulation unit 400 to switch from a first light transmittance parameter to a second light transmittance parameter when controlling the light set output by the light emitting unit 200 to switch from a first brightness value to a second brightness value, so that the light modulation unit 400 modulates the light set output by the light emitting unit 200 based on the second light transmittance parameter; the light transmittance of the light modulation unit 400 represented by the second light transmittance parameter is higher than the light transmittance of the light modulation unit 400 represented by the first light transmittance parameter.

[0077] When the light modulation unit 400 uses the first light transmission parameter to modulate the light set output by the light emitting unit 200, the blocking effect on the light set is relatively strong.

[0078] When the light modulation unit 400 uses the second light transmission parameter to modulate the light set output by the light emitting unit 200 , the blocking effect on the light set is relatively weak.

[0079] In this embodiment, when the brightness value of the light set output by the light emitting unit 200 decreases, if the light modulating unit 400 maintains the first light transmission parameter unchanged, the image brightness may be significantly reduced due to the strong blocking of the light modulating unit 400. If the light modulating unit 400 switches from the first light transmission parameter to the second light transmission parameter, more light can be allowed to pass because the blocking of the light modulating unit 400 is reduced, and the light finally projected to the image output unit 100 remains relatively constant, thereby keeping the brightness of the image relatively constant. In this way, while reducing the power consumption of the display device by reducing the brightness value of the light set output by the light emitting unit 200, the overall brightness of the image can also remain relatively stable, effectively avoiding the degradation of image quality that may be caused by the reduction of brightness.

[0080] Corresponding to the implementation of the light modulation unit 400 being a liquid crystal structure, when the second light transmittance parameter is adopted, the blocking effect of the liquid crystal structure on the light set is weakened, and the light transmittance can be improved. This adjustment compensates for the effect of the reduced brightness of the light emitting unit 200 on the overall brightness of the image, so that the loss of the light set when passing through the liquid crystal structure is reduced, and the light finally projected to the image output unit 100 remains relatively constant, thereby keeping the brightness of the image relatively constant.

[0081] Next, the control method provided in the present application is introduced. The control method introduced below and the display device introduced above can be referenced to each other.

[0082] Reference Figure 3 , is a flow chart of a control method provided in Example 3 of the present application, such as Figure 3 As shown, the method may include but is not limited to the following steps:

[0083] Step S101, determine the target pixel points in the image through the first detection, and construct a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel point set is within the set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold.

[0084] Step S102, determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit of the display device to switch from the first brightness value to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

[0085] The detailed process of steps S101-S102 can refer to the relevant control process of the control unit in the above embodiment, which will not be repeated here.

[0086] In this embodiment, the first detection can determine whether the number of over-bright pixels in the image is small. This step is crucial because if there are many over-bright pixels in the image, when the backlight brightness is reduced, the brightness change of these bright spots will be relatively obvious and easily noticed by the user, causing visual interference or discomfort.

[0087] After confirming that there are few over-bright pixels in the image, a candidate pixel set is further constructed, which can be composed of pixels with similar brightness values ​​in the image. The reason for selecting pixels with similar brightness values ​​is that in an image, areas that are easily recognized by the human eye usually have similar brightness values, forming visual coherence.

[0088] By constructing a set of candidate pixels, a second test can be performed on the set to determine whether the distribution of these pixels is concentrated and whether a recognizable outline is formed. If the set of candidate pixels fails the second test, it means that these pixels with similar brightness do not form a prominent and easily recognizable area in the image. This means that when the brightness value of the light set output by the light-emitting unit is reduced, the reduction in the brightness value of the light set will not cause the brightness change in certain areas to be particularly prominent, and the user may not noticeably feel the change in overall brightness.

[0089] This method of adjusting the brightness value of a light set can effectively reduce the power consumption of the display device while reducing visual interference or discomfort to the user, thereby improving the user's experience of using the display device.

[0090] As another optional embodiment of the present application, a control method is provided in Embodiment 4 of the present application. This embodiment is mainly an implementation method for determining that the candidate pixel set fails the second detection, which may include but is not limited to any of the following:

[0091] Step S11: Determine that the distribution of the pixels in the candidate pixel set does not form a regular contour.

[0092] A regular contour can be understood as a closed or non-closed contour that meets a preset geometric shape constraint. For example, a regular contour can include but is not limited to a rectangular contour or a circular contour.

[0093] When the distribution of the pixels in the candidate pixel set does not form a regular contour, the pixels in the candidate pixel set will not form a relatively regular shape in the image, and the human eye is more sensitive to regular shapes, and it is easy to distinguish regular shapes from the background and pay more attention to them. On the contrary, irregularly distributed pixels often do not become the visual focus due to the lack of such an obvious shape.

[0094] Therefore, when the brightness value of the light set output by the light-emitting unit decreases, for the candidate pixel point set that does not form a regular contour, although the brightness values ​​of the pixel points therein are similar, they are not significant in the image themselves, and the brightness change will not make them particularly prominent. Therefore, the user will not obviously feel the change in the overall brightness, thereby reducing the visual interference or discomfort that may be caused by the adjustment of the brightness value of the light set.

[0095] Step S12: determine that the distribution of the pixel points of the candidate pixel point set forms a regular contour, and the proportion of the regular contour in the image does not exceed a second set proportion threshold.

[0096] The second set percentage threshold can be set as needed and is not limited in this application.

[0097] In this embodiment, even if the distribution of pixel points of the candidate pixel point set constitutes a regular contour, if the proportion of the regular contour in the image does not exceed the second set proportion threshold, then the regular contour will still not appear too prominent to the user in the image. Therefore, when the brightness value of the light set output by the light-emitting unit decreases, the user will not obviously feel the change in the overall brightness, thereby reducing the visual interference or discomfort that may be caused by the adjustment of the brightness value of the light set.

[0098] In this embodiment, in order to elaborate on the specific process of the control method, the following description is made with reference to the specific implementation of the first detection and the second detection. For example, Figure 4 As shown, the control method may include:

[0099] Step S21 , detecting whether the proportion of the number of target pixels in the image is less than 5% (ie, an implementation method of performing the first detection).

[0100] If yes, execute step S22.

[0101] Step S22: construct a candidate pixel point set, wherein the difference between the brightness values ​​of the pixels in the candidate pixel point set is within a range of 0-25% (ie, an implementation method of setting a difference threshold range).

[0102] Step S23: Detect whether the distribution of the pixel points in the candidate pixel point set forms a rectangular contour (an implementation method of a regular contour).

[0103] If yes, execute step S24; if no, execute step S25.

[0104] Step S24 , detecting whether the proportion of the rectangular outline in the image does not exceed 1 / 64 (an implementation of the second set proportion threshold).

[0105] If not, execute step S25; if so, execute step S26.

[0106] Step S25: Control the light set output by the light-emitting unit of the display device to switch from the first brightness value to the second brightness value.

[0107] Step S26: Keep the first brightness value of the light set unchanged.

[0108] In this embodiment, it is detected whether the proportion of the number of target pixels in the image is less than 5%. If so, it is determined that the number of over-bright pixels contained in the image is small, and on this basis, a candidate pixel set is constructed. This set consists of pixels with similar brightness values ​​in the image. These pixels often form a coherent area visually and are easier to be recognized by the human eye.

[0109] Subsequently, it is detected whether the distribution of pixel points in the candidate pixel point set forms a rectangular outline. If a rectangular outline is not formed, the light set output by the light-emitting unit of the display device can be controlled to switch from a first brightness value to a second brightness value. For the candidate pixel point set that does not form a regular outline, although the brightness values ​​of the pixel points therein are similar, they are not significant in the image themselves, and the brightness change will not make them particularly prominent. Therefore, the user will not obviously feel the change in the overall brightness, thereby reducing the visual interference or discomfort that may be caused by the adjustment of the brightness value of the light set.

[0110] If a rectangular outline is formed, it can be further detected whether the proportion of the rectangular outline in the image does not exceed 1 / 64. If it does not exceed 1 / 64, if the proportion of the rectangular outline does not exceed 1 / 64, it means that the outline is relatively small in the image and will not occupy too much visual space. Since the human eye is more sensitive to large-area, significant shapes in the image, and small-area, insignificant shapes are often easily ignored, therefore, for a set of candidate pixels that form a rectangular outline and account for no more than 1 / 64, this regular outline will still not appear too prominent to the user in the image. Based on this judgment, the light set output by the light-emitting unit of the display device can be controlled to switch from a first brightness value to a lower second brightness value. Since the proportion of the rectangular outline in the image is very small, and the brightness values ​​of the pixels therein are similar, even if the brightness of the light-emitting unit is reduced, the brightness change of the rectangular outline will not appear particularly obvious in the overall image. Therefore, when using the display device, the user may not obviously feel the change in the overall brightness, which can reduce the visual interference or discomfort that may be caused to the user.

[0111] This method of adjusting the brightness value of the light set by controlling the first detection and the second detection can effectively reduce the power consumption of the display device while reducing the visual interference or discomfort caused to the user, thereby improving the user's experience of using the display device.

[0112] As another optional embodiment of the present application, refer to Figure 5 , is a flow chart of a control method provided in Example 5 of the present application, such as Figure 5 As shown, the method may include but is not limited to the following steps:

[0113] Step S201, determining that the number of an image and multiple frames of images before the image meets a preset frame quantity, and determining a target parameter based on multiple frames of continuous images that meet the preset frame quantity; the target parameter represents a rate of change of image content.

[0114] In this embodiment, the preset frame amount may be a specific value that is preset and fixed, or may be dynamically adjusted and optimized according to actual conditions or specific conditions.

[0115] In this embodiment, based on the multiple consecutive frames of images that meet the preset frame quantity, determining the target parameter may include but is not limited to:

[0116] Step S31, determining an average brightness value of pixels of each image in a plurality of consecutive frames of images that meet the preset frame quantity;

[0117] Step S32: determining a dispersion coefficient based on the average brightness value of each pixel point; the dispersion coefficient represents the degree of fluctuation between the average brightness values ​​of each pixel point.

[0118] The larger the discrete coefficient, the faster the change rate of the corresponding image content.

[0119] Step S202: Determine a theoretical adjustment amount of the brightness value of a set of light rays output by a light-emitting unit of a display device based on the target parameter.

[0120] In this embodiment, the faster the change rate of the image content represented by the target parameter is, the smaller the corresponding theoretical adjustment amount of the brightness value is.

[0121] When the image content changes at a fast rate (for example, scene switching, fast-moving objects, etc.), the conditions for reducing the backlight brightness are met (i.e., passing the first test and failing the second test) and the conditions for reducing the backlight are not met (i.e., failing the first test; or, passing the first test and passing the second test) may appear alternately. Therefore, the brightness value of the light set output by the light-emitting unit will change frequently. The frequent changes in the brightness value of the light set will cause the brightness of the picture to fluctuate significantly in a short period of time. Such fluctuations will be captured by the human eye as screen flickering. In this case, if the theoretical adjustment amount of the brightness value is set to a large value, the brightness value of the light set will change significantly, and such a large change will aggravate the fluctuation of the brightness of the picture. In order to solve this problem, the theoretical adjustment amount of the brightness value can be set to a relatively small value. When the image content changes at a fast rate, the amplitude of the change in the brightness value of the light set can be reduced, thereby reducing the fluctuation of the brightness of the picture.

[0122] In the case where the rate of change of the image content is slow, the conditions for reducing the backlight brightness (i.e., passing the first test and failing the second test) and the conditions for not reducing the backlight (i.e., failing the first test; or, passing the first test and passing the second test) may not alternate frequently. Therefore, the brightness value of the light set output by the light-emitting unit will not change so frequently, and the fluctuation of the picture brightness will be relatively small. In this case, the theoretical adjustment amount of the brightness value can be appropriately increased to more effectively reduce the power consumption of the display device while ensuring the picture quality.

[0123] Step S203, determine the target pixel points in the image through the first detection, and construct a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel point set is within the set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold.

[0124] The detailed process of step S203 can refer to the relevant introduction of the above step S101, which will not be repeated here.

[0125] Step S204, determine that the candidate pixel point set does not pass the second detection, and reduce the first brightness value of the light set output by the light-emitting unit based on the theoretical adjustment amount of the brightness value to switch to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline.

[0126] The first brightness value of the light set output by the light-emitting unit is reduced based on the theoretical adjustment amount of the brightness value to switch to the second brightness value, which is an implementation method of controlling the light set output by the light-emitting unit of the display device to switch from the first brightness value to the second brightness value in the above step S102.

[0127] In this embodiment, by determining that the number of an image and multiple frames of images before the image meets the preset frame quantity, the target parameter is determined based on multiple frames of continuous images that meet the preset frame quantity. Based on the target parameter, the theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit of the display device is determined, so that the theoretical adjustment amount of the brightness value and the rate of image change can be adapted. On this basis, it is determined that the target pixel point in the image passes the first detection, a candidate pixel point set is constructed, and it is determined that the candidate pixel point set does not pass the second detection. Based on the theoretical adjustment amount of the brightness value, the first brightness value of the light set output by the light-emitting unit is reduced to switch to the second brightness value, so that the reduction of the brightness value of the light set is more reasonable, while effectively reducing the power consumption of the display device, reducing visual interference or discomfort to the user.

[0128] As another optional embodiment of the present application, a control method is provided in Embodiment 6 of the present application. This embodiment is mainly an implementation method of the above-mentioned preset frame amount. The preset frame amount can be obtained by, but is not limited to, the following methods:

[0129] Step S41: Determine a preset frame quantity according to a refresh rate of a display device and a preset image acquisition time window length.

[0130] In this embodiment, the refresh rate of the display device can be dynamically adjusted according to the frame rate of the image, and the refresh rate of the display device can match the frame rate of the image.

[0131] In this embodiment, the refresh rate of the display device is flexibly adjustable, and can be dynamically adjusted according to the frame rate of the currently displayed image to ensure that the refresh rate of the display device is synchronized or matched with the frame rate of the image.

[0132] For example, if the currently displayed image sequence is a 100 frames / second video, the display device can adjust its refresh rate to 100 Hz accordingly, so that each frame of the image can be presented promptly and accurately on the display device, avoiding screen tearing or delay issues.

[0133] At the same time, according to the preset image acquisition time window length (for example, 3 seconds), we can determine the preset frame quantity to be 300 frames, that is, within this time window, 300 frames of continuous images can be acquired and processed to determine the target parameters.

[0134] In this embodiment, the preset frame amount is determined according to the refresh rate of the display device and the preset image acquisition time window length, so that the preset frame amount can be flexibly adjustable. Compared with the fixed frame amount mode (that is, the preset frame amount used is a fixed value), the flexible adjustment of the preset frame amount can avoid delays in updating the target parameters and waste of resources. For example, if the preset image acquisition window length is 3 seconds and the refresh rate is 100 Hz, then the target parameters can be determined by collecting 300 consecutive frames of images (that is, within 3 seconds), and if the fixed frame amount mode is used, the preset frame amount is 500 frames, then it is necessary to collect 500 consecutive frames of images to determine the target parameters. When the refresh rate is 100 Hz, it takes 5 seconds to determine the target parameters, which will cause delays in updating the target parameters and waste of resources.

[0135] As another optional embodiment of the present application, refer to Figure 6 , is a flow chart of a control method provided in Example 7 of the present application. This embodiment is mainly an implementation method of the above step S202. Figure 6 As shown, step S202 may include but is not limited to the following steps:

[0136] Step S2021: determine that the target parameter is greater than a set parameter threshold, and select the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is smaller than the second ratio.

[0137] If it is determined that the target parameter is greater than the set parameter threshold, it can be considered that the picture content changes rapidly, and a relatively low ratio can be selected to reduce the brightness value of the light set.

[0138] The parameter threshold can be set as needed and is not limited in this application.

[0139] Step S2022: determine that the target parameter is not greater than the set parameter threshold, and select the second ratio from the first ratio and the second ratio as the adjustment ratio.

[0140] If it is determined that the target parameter is not greater than the set parameter threshold, it can be considered that the picture content changes slowly, and a relatively high ratio can be selected to reduce the brightness value of the light set.

[0141] Step S2023: determining a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit based on the adjustment ratio and the first brightness value.

[0142] In this embodiment, the product of the adjustment ratio and the first brightness value may be determined as a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit.

[0143] In this embodiment, through the target parameter, one is selected from the first ratio and the second ratio as the adjustment ratio, and based on the adjustment ratio and the first brightness value, the theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined, so that the theoretical adjustment amount of the brightness value and the rate of image change can be adapted to each other. On this basis, it is determined that the target pixel point in the image passes the first detection, and a candidate pixel point set is constructed. It is determined that the candidate pixel point set does not pass the second detection. Based on the theoretical adjustment amount of the brightness value, the first brightness value of the light set output by the light-emitting unit is reduced to switch to the second brightness value, so that the reduction in the brightness value of the light set is more reasonable, while effectively reducing the power consumption of the display device, reducing visual interference or discomfort to the user.

[0144] Furthermore, by setting a fixed first ratio and a fixed second ratio, the calculation load can be reduced and the real-time performance can be improved.

[0145] As another optional embodiment of the present application, a control method is provided in Embodiment 8 of the present application, which may include but is not limited to the following steps:

[0146] Step S301, determining that the number of an image and multiple frames of images before the image meets a preset frame quantity, and determining a target parameter based on multiple frames of continuous images that meet the preset frame quantity; the target parameter represents a rate of change of image content.

[0147] Step S302: Determine a theoretical adjustment amount of the brightness value of a set of light rays output by a light-emitting unit of a display device based on the target parameter.

[0148] The detailed process of steps S301-S302 can refer to the relevant introduction of the above steps S201-S202, which will not be repeated here.

[0149] Step S303: determine that the number of the image and multiple frames of images before the image does not meet the preset frame quantity, and select the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is smaller than the second ratio.

[0150] Determining that the number of the image and multiple frames of images before the image does not meet the preset frame quantity may indicate that not enough images have been collected to accurately calculate the target parameters. In this case, a larger brightness value adjustment amount may introduce unnecessary visual interference or discomfort. Therefore, a relatively small first ratio can be selected as the adjustment ratio.

[0151] For understanding of the first ratio and the second ratio, please refer to the relevant introduction in Example 7, which will not be repeated here.

[0152] Step S304: determining a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit based on the adjustment ratio and the first brightness value.

[0153] The detailed process of step S304 can be found in the related introduction of the above step S2023, which will not be repeated here.

[0154] Step S305, determine the target pixel points in the image through the first detection, and construct a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel point set is within the set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold.

[0155] Step S306, determine that the candidate pixel point set fails the second detection, and reduce the first brightness value of the light set output by the light-emitting unit based on the theoretical adjustment amount of the brightness value to switch to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline.

[0156] The detailed process of steps S305-S306 can refer to the relevant introduction of the above steps S203-S204, which will not be repeated here.

[0157] In this embodiment, when not enough images are collected to accurately calculate the target parameters, a smaller first ratio is selected from the fixed first ratio and the second ratio as the adjustment ratio. This can avoid excessive adjustments to the brightness value of the light set, reduce fluctuations in picture brightness, and reduce visual interference or discomfort to the user.

[0158] As another optional embodiment of the present application, refer to Figure 7, is a flow chart of a control method provided in Example 9 of the present application. This embodiment is mainly an implementation method of the above step S204, such as Figure 7 As shown, step S204 may include but is not limited to the following steps:

[0159] Step S2041: determine that the candidate pixel point set fails the second detection, and determine an actual brightness value adjustment amount based on the brightness value theoretical adjustment amount; the actual brightness value adjustment amount is less than the brightness value theoretical adjustment amount.

[0160] In this embodiment, the theoretical adjustment amount of the brightness value may be multiplied by a preset adjustment coefficient, but is not limited to, and the result of the multiplication is used as the actual adjustment amount of the brightness value, and the preset adjustment coefficient is less than 1. The preset adjustment coefficient may be set as needed and is not limited in this application. For example, the preset adjustment coefficient may include 1 / 200.

[0161] In this embodiment, the theoretical adjustment amount of the brightness value may also be processed based on, but not limited to, an attenuation function to obtain an actual adjustment amount of the brightness value.

[0162] Step S2042: reducing the first brightness value based on the actual adjustment amount of the brightness value to switch to the second brightness value.

[0163] In this embodiment, the difference between the first brightness value and the actual adjustment amount of the brightness value may be used as the second brightness value.

[0164] After switching to the second brightness value, the second brightness value can be regarded as a new first brightness value, and when the image output unit outputs a new image, the control unit continues to perform the corresponding control process. Figure 8 As shown, when the image output unit outputs a new image, step S51 is executed to determine whether the number of the image and multiple frames of images before the image meets the preset frame quantity, and based on the multiple frames of continuous images that meet the preset frame quantity, the target parameters are determined; the target parameters represent the rate of change of the image content.

[0165] Step S52: Determine a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit of the display device based on the target parameter.

[0166] Step S53: Determine whether the target pixel in the image passes the first detection.

[0167] If not, execute step S54; if so, execute step S55.

[0168] Step S54: keep the first brightness value of the light set unchanged.

[0169] Step S55: construct a candidate pixel point set.

[0170] Step S56: Determine whether the candidate pixel point set passes the second detection.

[0171] If yes, execute step S54; if no, execute step S57.

[0172] Step S57: determining an actual adjustment amount of the brightness value based on the theoretical adjustment amount of the brightness value; the actual adjustment amount of the brightness value is less than the theoretical adjustment amount of the brightness value.

[0173] Step S58: reducing the first brightness value based on the actual adjustment amount of the brightness value to switch to the second brightness value.

[0174] Step S59: Use the second brightness value as a new first brightness value, and when the image output unit outputs a new image, continue to execute step S51.

[0175] In this embodiment, the human eye is relatively insensitive to a single small brightness change. Therefore, each time the brightness value of the light set is adjusted, the first brightness value is reduced based on the actual adjustment amount of the brightness value, so that the change in the brightness value of each light set is relatively small. It is important that this small adjustment takes effect immediately each time, and it is not a one-time large adjustment after accumulating to a specific value. This small change makes it difficult for the user to perceive the specific changes each time.

[0176] Over time, these small adjustments are made repeatedly and gradually accumulate, causing a relatively large change in the brightness value of the light set. However, due to the adaptability of the human eye and its relative insensitivity to brightness changes, as well as the small magnitude of each adjustment, the user may not realize that the brightness of the picture has changed significantly. The user may gradually adapt to the new brightness level and no longer pay special attention to the previous brightness setting, thus remaining unaware of the entire brightness adjustment process.

[0177] As another optional embodiment of the present application, refer to Fig. 9 , is a flow chart of a control method provided in Example 10 of the present application, which method may include but is not limited to the following steps:

[0178] Step S401, determine the target pixel points in the image through the first detection, and construct a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel point set is within the set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold.

[0179] Step S402, determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit of the display device to switch from the first brightness value to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

[0180] The detailed process of steps S401-S403 can refer to the relevant introduction of steps S101-S102 in Example 1, which will not be repeated here.

[0181] Step S403, controlling the light modulation unit of the display device to switch from the first light transmittance parameter to the second light transmittance parameter; the light transmittance of the light modulation unit represented by the second light transmittance parameter is higher than the light transmittance of the light modulation unit represented by the first light transmittance parameter.

[0182] The detailed process of step S403 can refer to the relevant introduction about the light modulation unit and the control unit in embodiment 2, which will not be repeated here.

[0183] In this embodiment, when the brightness value of the light set output by the light-emitting unit decreases, if the light modulation unit maintains the first light transmission parameter unchanged, the image brightness may be significantly reduced due to the strong blocking of the light modulation unit. If the light modulation unit switches from the first light transmission parameter to the second light transmission parameter, more light can pass through because the blocking of the light modulation unit is reduced, and the light finally projected to the image output unit remains relatively constant, thereby keeping the brightness of the image relatively constant. In this way, while reducing the power consumption of the display device by reducing the brightness value of the light set output by the light-emitting unit, the overall brightness of the image can also remain relatively stable, effectively avoiding the degradation of image quality that may be caused by the reduction in brightness.

[0184] Next, the control device provided in the present application is introduced. The control device introduced below and the control method introduced above can be referenced to each other.

[0185] The control device may include: a building module and a first control module.

[0186] A construction module is used to determine whether the target pixel in the image passes the first detection and construct a candidate pixel set; the first detection is used to detect whether the proportion of the number of the target pixel in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel set is within the set difference threshold range; the brightness value of the target pixel meets the set brightness threshold;

[0187] The first control module is used to determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit of the display device to switch from a first brightness value to a second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

[0188] The first control module determines that the candidate pixel set fails the second detection, which may include any of the following:

[0189] Determining that the distribution of the pixels in the candidate pixel set does not form a regular contour;

[0190] It is determined that the distribution of the pixel points of the candidate pixel point set forms a regular contour, and the proportion of the regular contour in the image does not exceed a second set proportion threshold.

[0191] In this embodiment, the control device may further include:

[0192] The first determination module is used to determine whether the number of the image and multiple frames of images before the image meets a preset frame quantity, and determine a target parameter based on multiple frames of continuous images that meet the preset frame quantity; the target parameter represents the rate of change of image content.

[0193] A second determination module is used to determine a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit of the display device based on the target parameter;

[0194] The process of the first control module controlling the light set output by the light emitting unit of the display device to switch from the first brightness value to the second brightness value may specifically include:

[0195] The first brightness value of the light set output by the light emitting unit is reduced based on the brightness value theoretical adjustment amount to switch to a second brightness value.

[0196] The preset frame amount can be obtained by:

[0197] The preset frame quantity is determined according to the refresh rate of the display device and the preset image acquisition time window length.

[0198] In this embodiment, the second determining module may be specifically used for:

[0199] Determining that the target parameter is greater than a set parameter threshold, selecting the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is less than the second ratio;

[0200] Determining that the target parameter is not greater than the set parameter threshold, and selecting the second ratio from the first ratio and the second ratio as the adjustment ratio;

[0201] Based on the adjustment ratio and the first brightness value, a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined.

[0202] In this embodiment, the control device may further include:

[0203] The third determination module is used to determine that the number of the image and multiple frames of images before the image does not meet the preset frame quantity, and select the first ratio from the first ratio and the second ratio as the adjustment ratio; the first ratio is smaller than the second ratio.

[0204] The fourth determination module is used to determine a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit based on the adjustment ratio and the first brightness value.

[0205] In this embodiment, the process in which the first control module reduces the first brightness value of the light set output by the light emitting unit based on the brightness value theoretical adjustment amount to switch to the second brightness value may specifically include:

[0206] Based on the theoretical adjustment amount of the brightness value, determining an actual adjustment amount of the brightness value; the actual adjustment amount of the brightness value is less than the theoretical adjustment amount of the brightness value;

[0207] The first brightness value is reduced based on the actual adjustment amount of the brightness value to switch to the second brightness value.

[0208] In this embodiment, the control device may further include:

[0209] The second control module is used to control the light modulation unit of the display device to switch from a first light transmittance parameter to a second light transmittance parameter; the light transmittance of the light modulation unit represented by the second light transmittance parameter is higher than the light transmittance of the light modulation unit represented by the first light transmittance parameter.

[0210] It should also be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the device embodiments provided by the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

[0211] Through the description of the above implementation mode, the technicians in the field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation mode in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, a training device, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0212] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0213] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a training device, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, training device, or data center. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

Claims

1. A display device, comprising: An image output unit, used for outputting images; a light emitting unit, configured to output a light set to support the image output unit in outputting the image; Control unit for: Determine that the target pixel in the image passes the first detection and constructs a set of candidate pixel points; the first detection is used to detect whether the proportion of the number of the target pixel points in the image meets a first set proportion threshold; the difference between the brightness values ​​of the pixels in the candidate pixel set is within a set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold; Determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit to switch from the first brightness value to the second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

2. The display device according to claim 1, further comprising: a light modulation unit, disposed in the optical path between the light emitting unit and the image output unit, for modulating the light set output by the light emitting unit and projecting the modulated light set to the image output unit; The control unit is also used to control the light modulation unit to switch from a first light transmittance parameter to a second light transmittance parameter when the light set output by the light-emitting unit is switched from a first brightness value to a second brightness value, so that the light modulation unit modulates the light set output by the light-emitting unit based on the second light transmittance parameter; the transmittance of the light modulation unit represented by the second light transmittance parameter is higher than the transmittance of the light modulation unit represented by the first light transmittance parameter.

3. A control method, comprising: Determine the target pixel in the image through the first detection and construct a set of candidate pixels; The first detection is used to detect whether the proportion of the number of the target pixel points in the image meets the set proportion threshold; the difference between the brightness values ​​of the pixel points in the candidate pixel point set is within the set difference threshold range; the brightness value of the target pixel point meets the set brightness threshold; Determine that the candidate pixel point set fails the second detection, and control the light set output by the light-emitting unit of the display device to switch from a first brightness value to a second brightness value; the second detection is used to detect whether the distribution of pixels within the candidate pixel point set is concentrated and presents a recognizable outline; the second brightness value is less than the first brightness value.

4. The control method according to claim 3, wherein determining that the candidate pixel set fails the second detection comprises any one of the following: Determining that the distribution of the pixels in the candidate pixel set does not form a regular contour; It is determined that the distribution of the pixel points of the candidate pixel point set forms a regular contour, and the proportion of the regular contour in the image does not exceed a second set proportion threshold.

5. The control method according to claim 3, before determining that the target pixel in the image passes the first detection, further comprising: Determining that the number of the image and multiple frames of images before the image meets a preset frame quantity, and determining a target parameter based on multiple frames of continuous images that meet the preset frame quantity; The target parameter represents the rate of change of the image content; Based on the target parameter, determining a theoretical adjustment amount of the brightness value of a set of light rays output by a light-emitting unit of a display device; The controlling the light set output by the light emitting unit of the display device to switch from a first brightness value to a second brightness value includes: The first brightness value of the light set output by the light emitting unit is reduced based on the brightness value theoretical adjustment amount to switch to a second brightness value.

6. The control method according to claim 5, wherein the preset frame amount is obtained by: The preset frame quantity is determined according to the refresh rate of the display device and the preset image acquisition time window length.

7. The control method according to claim 5, wherein determining the theoretical adjustment amount of the brightness value of the light set output by the light emitting unit of the display device based on the target parameter comprises: Determining that the target parameter is greater than a set parameter threshold, selecting the first ratio from the first ratio and the second ratio as the adjustment ratio; The first ratio is smaller than the second ratio; Determining that the target parameter is not greater than the set parameter threshold, and selecting the second ratio from the first ratio and the second ratio as the adjustment ratio; Based on the adjustment ratio and the first brightness value, a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined.

8. The control method according to claim 5, further comprising: Determining that the number of the image and the number of frames of images before the image does not meet a preset frame quantity, selecting the first ratio from the first ratio and the second ratio as the adjustment ratio; The first ratio is smaller than the second ratio; Based on the adjustment ratio and the first brightness value, a theoretical adjustment amount of the brightness value of the light set output by the light-emitting unit is determined.

9. The method according to claim 5, wherein the step of reducing the first brightness value of the light set output by the light emitting unit based on the brightness value theoretical adjustment amount to switch to the second brightness value comprises: Based on the theoretical adjustment amount of the brightness value, determining an actual adjustment amount of the brightness value; The actual adjustment amount of the brightness value is less than the theoretical adjustment amount of the brightness value; The first brightness value is reduced based on the actual adjustment amount of the brightness value to switch to the second brightness value.

10. The control method according to claim 3, after controlling the light set output by the light emitting unit to switch from the first brightness value to the second brightness value, further comprising: Controlling a light modulation unit of a display device to switch from a first light transmission parameter to a second light transmission parameter; The light transmittance of the light modulation unit represented by the second light transmittance parameter is higher than the light transmittance of the light modulation unit represented by the first light transmittance parameter.

Images