Display module, display method, computer-readable storage medium, and electronic device

Abstract

The present disclosure relates to the technical field of display, and provides a display module, a display method, a computer-readable storage medium, and an electronic device, which can solve the problem of poor display effect in existing display modules. The display module of the present disclosure comprises: a cover plate comprising a first surface and a second surface which are oppositely arranged; a display panel arranged on one side of the second surface of the cover plate; and a first functional layer configured to reduce the reflectivity of the display module, the first functional layer being arranged on at least one of the first surface of the cover plate, the second surface of the cover plate, and the side of the display panel close to the second surface of the cover plate. According to the present disclosure, the provision of the first functional layer reduces the reflectivity of the display module, thereby improving the display effect of the display module.

Description

Display module, display method, computer-readable storage medium, and electronic device Technical Field

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display module, a display method, a computer-readable storage medium, and an electronic device. Background Art

[0002] The optical performance test of the display screen is generally carried out under darkroom conditions, but the actual usage scenarios of the product are all under ambient light conditions. Therefore, the actual viewing effect of the product cannot be measured by the optical parameters calibrated in its specification sheet, and more scientific evaluation standards need to be introduced.

[0003] Outdoor display products are exposed to high-brightness environments. Due to their high surface reflectivity, the reflected ambient light on the product surface severely impacts the user's visual experience and hinders their user experience. To address this issue, manufacturers typically increase the brightness of the display module to counteract surface reflections, thereby enhancing the user experience. For example, existing display products typically include 55-inch outdoor high-brightness display products with module brightness exceeding 4000 nits, or 55-inch and 75-inch outdoor high-brightness display products with module brightness of 3500 nits. This extremely high module brightness stems from high backlight power consumption. For example, a 55-inch, 3500 nit high-brightness display module in existing technology can consume up to 400W of backlight power. This high backlight power consumption generates significant heat, and in addition, the module's outdoor use can lead to significant module temperature rise in the summer, resulting in serious reliability issues and impacting product lifespan and performance. In particular, the extremely high product temperature severely impacts the function of the display panel, causing polarization of the liquid crystal in high-temperature environments, resulting in a black screen or a reddish dark state. At the same time, high-brightness outdoor display products bring light pollution, affecting the normal lives of people around the products.

[0004] Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide a display module with low brightness and low power consumption, which can ensure that the display module has a good display effect under external environment, a display method based on the display module, a computer-readable storage medium and an electronic device.

[0006] In a first aspect, the technical solution adopted to solve the technical problem of the present invention is a display module, which includes:

[0007] The cover plate includes a first surface and a second surface disposed opposite to each other;

[0008] A display panel is provided on one side of the second surface of the cover plate;

[0009] The first functional layer is configured to reduce the reflectivity of the display module, wherein the first functional layer is provided on at least one of the first surface of the cover plate, the second surface of the cover plate, and the side of the display panel close to the second surface of the cover plate.

[0010] In some embodiments, a polarizer is further included, which is disposed on a side of the display panel close to the second surface of the cover plate, and the polarizer is reused as the first functional layer.

[0011] In some embodiments, the first functional layer is any one of silicon oxide, fluoride, and silicon nitride.

[0012] In some embodiments, it further includes:

[0013] a determining module configured to determine a reflectivity of the display module according to the first functional layer;

[0014] a calculation module configured to calculate the backlight brightness of the display module according to the reflectivity of the display module and a first mapping relationship; the first mapping relationship is a correspondence between the reflectivity of the display module and the backlight brightness;

[0015] The adjustment module is configured to adjust the current backlight brightness of the display module based on the backlight brightness of the display module obtained by the calculation module.

[0016] In some embodiments, it further includes:

[0017] a determination module configured to determine the reflectivity of the display module and the backlight brightness of the module;

[0018] a calculation module configured to generate a gamma curve based on the backlight brightness of the display module and the reflectivity of the display module and according to a preset algorithm;

[0019] The adjustment module is configured to adjust the grayscale voltage to be written according to the Gamma curve, so that the display module displays according to the written grayscale voltage.

[0020] In some embodiments, it further includes:

[0021] A light sensor is configured to detect ambient light intensity in real time;

[0022] a calculation module configured to calculate a current ambient light contrast ratio based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the ambient light intensity detected by the light sensor when the display module displays the first grayscale image, and the ambient light intensity detected by the light sensor when the display module displays the second grayscale image;

[0023] The adjustment module is configured to adjust the backlight brightness of the display module according to the current ambient light contrast and a pre-stored correspondence between the ambient light contrast and the backlight brightness of the display module.

[0024] In some embodiments, the adjustment module includes a judgment unit and an adjustment unit.

[0025] The determining unit is configured to determine whether the current ambient light contrast is less than a preset ambient light contrast;

[0026] The adjustment unit adjusts the backlight brightness of the display module according to a corresponding relationship between the ambient light contrast and the backlight brightness of the display module in response to the current ambient light contrast being less than the preset ambient light contrast.

[0027] In some embodiments, the display module includes a plurality of light-sensitive sensors, and the calculation module includes a comparison unit and a calculation unit.

[0028] The comparing unit is configured to obtain a maximum value and a minimum value of the ambient light intensity values ​​detected in real time by the multiple light-sensitive sensors, calculate a difference between the maximum value and the minimum value, record the difference as a first difference, and compare the first difference with a preset threshold;

[0029] The calculation unit is configured to calculate an average value of a plurality of ambient light intensities detected in real time by the plurality of light sensors in response to the first difference being less than the preset threshold;

[0030] The calculation unit is further configured to calculate the ambient light contrast based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the average value of multiple ambient light intensities detected in real time by the multiple photosensors when the display module displays the first grayscale image, and the average value of multiple ambient light intensities detected in real time by the multiple photosensors when the display module displays the second grayscale image.

[0031] In some embodiments, a calibration module is also included, which is configured to calibrate the backlight brightness of the display module based on a maximum backlight power consumption threshold at a preset time in response to the ambient light intensity detected by the photosensor not meeting the brightness value within a preset range when the display module displays a preset grayscale image.

[0032] In a second aspect, an embodiment of the present disclosure further provides a display method based on a display module, wherein the display method is applied to a display module as described in any one of the first aspects above, and the method includes: writing a grayscale voltage to the display module to enable the display module to display.

[0033] In some embodiments, the method further comprises:

[0034] Obtaining a reflectivity of the display module and a first mapping relationship;

[0035] Calculating the backlight brightness of the display module according to the reflectivity of the display module and the first mapping relationship; wherein the first mapping relationship is a correspondence between the reflectivity of the display module and the backlight brightness;

[0036] Based on the backlight brightness of the display module, the current backlight brightness of the display module is adjusted.

[0037] In some embodiments, the method further comprises:

[0038] Determining the reflectivity of the display module and the backlight brightness of the module;

[0039] Based on the backlight brightness of the display module and the reflectivity of the display module, a gamma curve is generated according to a preset algorithm;

[0040] The grayscale voltage to be written is adjusted according to the Gamma curve, so that the display module performs display according to the written grayscale voltage.

[0041] In some embodiments, the method further comprises:

[0042] Obtaining the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the ambient light intensity detected by the light sensor when the display module displays the first grayscale image, and the ambient light intensity detected by the light sensor when the display module displays the second grayscale image;

[0043] Calculating a current ambient light contrast ratio based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the ambient light intensity detected by the light sensor when the display module displays the first grayscale image, and the ambient light intensity detected by the light sensor when the display module displays the second grayscale image;

[0044] According to the current ambient light contrast, based on a pre-stored correspondence between the ambient light contrast and the backlight brightness of the display module, the backlight brightness of the display module is adjusted.

[0045] In some embodiments, adjusting the backlight brightness of the display module according to the current ambient light contrast and based on a pre-stored correspondence between the ambient light contrast and the backlight brightness of the display module includes:

[0046] Determining whether the current ambient light contrast is less than a preset ambient light contrast;

[0047] In response to the current ambient light contrast being less than the preset ambient light contrast, the backlight brightness of the display module is adjusted according to a corresponding relationship between the ambient light contrast and the backlight brightness of the display module.

[0048] In some embodiments, the display module includes a plurality of light sensors, and the ambient light contrast is calculated based on the light output brightness when the display module displays a first grayscale image and a second grayscale image in a dark room, the ambient light intensity detected by the light sensors when the display module displays the first grayscale image, and the ambient light intensity detected by the light sensors when the display module displays the second grayscale image, including:

[0049] When the display module displays a first grayscale image, obtaining a maximum value and a minimum value of the ambient light intensity detected by the multiple light sensors, calculating a difference between the maximum value and the minimum value, which is recorded as a first difference, and comparing the first difference with a first preset threshold;

[0050] In response to the first difference being less than the first preset threshold, calculating an average value of the ambient light intensities detected by the plurality of light sensors;

[0051] When the display module displays the second grayscale image, obtaining the maximum and minimum values ​​of the ambient light intensities detected by the multiple light sensors, calculating the difference between the maximum and minimum values, which is recorded as a second difference, and comparing the second difference with a second preset threshold;

[0052] In response to the second difference being less than the second preset threshold, calculating an average value of the ambient light intensities detected by the plurality of light sensors;

[0053] The ambient light contrast is calculated based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the average value of multiple ambient light intensities detected in real time by the multiple photosensors when the display module displays the first grayscale image, and the average value of multiple ambient light intensities detected in real time by the multiple photosensors when the display module displays the second grayscale image.

[0054] In some embodiments, the method further comprises:

[0055] At a preset time, in response to the ambient light intensity detected by the light sensor not meeting a brightness value within a preset range when the display module displays a preset grayscale image, the backlight brightness of the display module is calibrated based on a maximum backlight power consumption threshold.

[0056] In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium on which a computer program code for a display method based on a display module is stored. When the computer program code is executed by a processor, any method provided in the second aspect above is implemented.

[0057] In a fourth aspect, an embodiment of the present disclosure further provides an electronic device, comprising:

[0058] processor;

[0059] A memory for storing processor-executable instructions, wherein

[0060] The processor is configured to call instructions stored in the memory to execute any one of the methods provided in the second aspect above. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 shows a curve showing the change of ambient light contrast with ambient light illumination for two display modules with the same contrast and the same display module brightness;

[0062] Figures 2a and 2b are comparative photos of the display effects of two display modules with the same contrast and the same display module brightness in an outdoor environment;

[0063] Figure 3 shows the curve of the ACR of the display module changing with the ambient light intensity;

[0064] FIG4 is a curve showing the change of the ACR of the display module with the reflectivity of the display module surface;

[0065] 5a-5b are schematic diagrams of a display module in the prior art;

[0066] 6a-6c are structural block diagrams of a display module provided by an embodiment of the present disclosure;

[0067] FIG7 is a comparison diagram of the visual effects of two display modules provided by an embodiment of the present disclosure under external environment;

[0068] FIG8 is a structural block diagram of another display module provided by an embodiment of the present disclosure;

[0069] FIG9 is a graph showing the ACR of a display module with different reflectivity and the backlight brightness of the display module according to an embodiment of the present disclosure;

[0070] FIG10 is a schematic diagram of grayscale photos of a common display module and a low-reflection display module in an outdoor environment provided by an embodiment of the present disclosure;

[0071] FIG11 is a structural block diagram of another display module provided by an embodiment of the present disclosure;

[0072] FIG12 is a schematic diagram of a detection effective area of ​​a display screen displayed by a display module provided by an embodiment of the present disclosure;

[0073] FIG13 is a flow chart of an ambient light intensity test provided by an embodiment of the present disclosure;

[0074] FIG14 is a trend graph of an LED life curve in a display module provided by an embodiment of the present disclosure;

[0075] FIG15 is a flow chart of a display method provided by an embodiment of the present disclosure;

[0076] FIG16 is a flow chart of a display method provided by an embodiment of the present disclosure;

[0077] FIG17 is a flow chart of a display method provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0078] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0079] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0080] Contrast ratio is a commonly used technical parameter to measure product display performance. This parameter is usually tested in a darkroom. However, actual observation shows that the actual visual performance of display products is not closely related to the contrast ratio tested in a darkroom. Ambient light contrast ratio, on the other hand, measures the brightness and darkness of a display product when exposed to ambient light. Therefore, for display products, especially those used outdoors, ambient light contrast ratio should be used to characterize their display performance.

[0081] Figure 1 shows the Ambient Contract Ration (ACR) curves of two display modules with the same contrast and brightness as the ambient light intensity. Figures 2a and 2b show comparative photos of the display effects of two display modules with the same contrast and brightness in outdoor environments. Figure 2a shows the display effect of display module 1 in Figure 1 under outdoor conditions, while Figure 2b shows the display effect of display module 2 in Figure 1 under outdoor conditions.

[0082] As shown in Figure 1, it can be clearly seen that under the conditions of the same display module brightness and contrast, under the same ambient light illumination, the ambient light contrast ratio (ACR) of display module 1 is significantly greater than the ACR of display module 2. As shown in Figures 2a-2b, it can also be clearly seen that the display effect of display module 1 in outdoor environment is better, the details of the displayed picture are more specific, the colors are brighter, and therefore, the picture looks more realistic. Among them, the display module brightness refers to the actual brightness of the display module under the combined effect of the display module backlight brightness and ambient light exposure. When the external ambient light is not considered, the display module brightness and the display module backlight brightness can be considered to be similar. When the backlight brightness of the display module remains unchanged, the display module brightness is mainly related to the ambient light exposure.

[0083] Through the analysis of Figures 1 and 2a-2b above, the inventors found that the actual visual effect of the display product has little to do with the contrast of the display product tested under dark room conditions. The actual visual effect of the display product is mainly related to the ambient contrast, and when other conditions are the same, the greater the ambient light contrast, the better the visual effect of the display product.

[0084] The inventors further analyzed the factors influencing ACR by performing a control variable analysis on the display module surface reflectivity, display module brightness, and ACR. Figure 3 shows a curve showing how the display module's ACR changes with ambient light intensity. Figure 4 shows a curve showing how the display module's ACR changes with the display module's surface reflectivity.

[0085] As shown in Figures 3 and 4, as the ambient light intensity increases, the ACR gradually decreases; as the reflectivity of the display module surface increases, the ACR gradually decreases. It can be seen that the lower the reflectivity of the display module surface and the higher the brightness of the display module, the greater the ACR of the display product. Therefore, the inventors have discovered that the ACR of the display module can be effectively improved by increasing the brightness of the display module (i.e., the backlight brightness of the display module) or reducing the reflectivity of the display module surface, thereby improving the actual visual effect of the display module.

[0086] Figures 5a-5b are schematic diagrams of a display module in the prior art. The display module includes a cover plate 1 and a display panel 2. The cover plate 1 includes a first surface 11 and a second surface 12 disposed opposite each other, and the display panel 2 is disposed on the second surface 12 of the cover plate 1. Display modules are typically used outdoors, and the frame sealant will yellow under sunlight, affecting the display quality of the display module. Therefore, the cover plate 1 and display panel 2 of the display module are semi-laminated using frame sealant, leaving a gap between the cover plate 1 and the display panel 2.

[0087] The inventors simulated the optical path using light-tools software and found that the main factors affecting the display module's reflectivity are the reflectivity of the light-emitting side of the display panel 2 and the reflectivity of the first and second surfaces 11, 12 of the cover plate 1. Therefore, when exposed to ambient light, reflections are generated from the first and second surfaces 11, 12 of the cover plate 1, and the light-emitting side of the display panel 2 (i.e., the side of the display panel 2 closest to the second surface 12 of the cover plate 1).

[0088] It should be noted that the reflectivity of the display module mentioned in the present disclosure refers to the sum of the reflectivities of the first surface 11 and the second surface 12 of the cover plate 1 and the display panel 2 in the display module.

[0089] Based on the above analysis, an embodiment of the present disclosure proposes a display module. Figures 6a to 6c are structural block diagrams of a display module provided by an embodiment of the present disclosure, respectively. As shown in Figures 6a to 6c, the display module includes: a cover plate 1, a display panel 2 and a first functional layer 3, wherein the cover plate 1 includes a first surface 11 and a second surface 12 arranged opposite to each other; the display panel 2 is arranged on one side of the second surface 12 of the cover plate 1; the first functional layer 3 is configured to reduce the reflectivity of the display module, and the first functional layer 3 is provided on at least one of the first surface 11 of the cover plate 1, the second surface 12 of the cover plate 1 and the side of the display panel 2 close to the second surface 12 of the cover plate 1.

[0090] Specifically, as described above, by reducing the reflectivity of the display module surface, the ACR of the display module can be effectively improved, thereby improving the actual visual effect of the display module. The embodiment of the present disclosure reduces the reflectivity of the display module by adding a first functional layer 3 to the display module. And when the ambient light is irradiated, the first surface 11, the second surface 12 of the cover plate 1 and the light-emitting side of the display panel 2 (that is, the side of the display panel 2 close to the second surface 12 of the cover plate 1) will all produce reflections. Therefore, the first functional layer 3 can be provided on one or more of the first surface 11, the second surface 12 of the cover plate 1 and the light-emitting side of the display panel 2 (that is, the side of the display panel 2 close to the second surface 12 of the cover plate 1).

[0091] In some embodiments, the first functional layer 3 may be an anti-reflection film layer.

[0092] It should be noted that the ordinary display modules mentioned in the following embodiments refer to display modules that do not include the first functional layer 3, such as the display modules shown in Figure 5a or Figure 5b; and the low-reflection display modules (or anti-reflection display modules) mentioned all refer to display modules that include the first functional layer 3, and the first functional layer is one or more layers, or the display modules arranged on one or more of the first surface 11, the second surface 12 of the cover plate 1, and the light-emitting side of the display panel 2 (i.e., the side of the display panel 2 close to the second surface 12 of the cover plate 1) are all low-reflection display modules (or anti-reflection display modules). Among them, the reflectivity of the low-reflection display module (or anti-reflection display module) is lower than the reflectivity of the ordinary display module.

[0093] Table 1 shows the simulated reflectivity of different anti-reflection module surfaces obtained by adding anti-reflection coatings to the display panel 2 and the first and second surfaces 11 and 12 of the cover plate 1 of a conventional outdoor display module. A conventional display module is the one shown in Figure 5a or Figure 5b, as shown in Table 1.

[0094] Table 1. Simulated reflectivity of anti-reflection modules with different architectures

[0095] As can be seen from Table 1, adding an anti-reflection coating to any of the display panel 2, first surface 11, and second surface 12 of the cover plate 1 reduces the reflectivity of the display module. Furthermore, adding an anti-reflection coating to more than one of the three reduces the reflectivity of the display module even more than adding an anti-reflection coating to only one of the three.

[0096] In some embodiments, the display module includes not only the cover plate 1 , the display panel 2 and the first functional layer 3 , but also a polarizer (not shown in the figure), which is arranged on the side of the display panel 2 close to the second surface 12 of the cover plate 1 .

[0097] In some embodiments, the polarizer is reused as the first functional layer 3 .

[0098] Specifically, the first functional layer 3 is an anti-reflection coating. Anti-reflection coatings can be implemented in a variety of ways, including but not limited to ultra-low-reflection film, standard low-reflection film, low-reflection moth-eye, and low-reflection polarizers. Currently available anti-reflection coatings with different manufacturing processes were tested and their prices compared. Table 2 shows the measured reflectivity, surface hardness, and price of different anti-reflection coatings.

[0099] Table 2. Comparison of reflectivity, hardness and price of different types of anti-reflection coatings

[0100] According to Table 2, through testing and price comparison of anti-reflection coatings, considering that the anti-reflection coating may be damaged during the lamination process, it is not recommended to use low-reflection moth-eye film; referring to the price-performance ratio, ordinary low-reflection film and low-reflection polarizer have the highest price-performance ratio. Ordinary low-reflection film can be laminated on the first surface 11 and the second surface 12 of the cover plate 1, and a low-reflection polarizer can be used on the display panel 2.

[0101] Therefore, by using a low-reflection polarizer on the display panel 2 and laminating a low-reflection film on the first surface 11 and the second surface 12 of the cover plate 1 , a display module with the lowest cost and the lowest reflectivity can be obtained.

[0102] Furthermore, actual measurements of the surface hardness of various anti-reflection coating materials revealed that their hardness was less than 6H, failing to meet the surface hardness requirement of ≥6H for the outermost interface of outdoor display products. Therefore, anti-reflection coating materials cannot be used on the first surface 11 of the cover plate 1. In some embodiments, the first surface 11 of the cover plate 1 of the display module may be treated with a low-reflection treatment process.

[0103] In some embodiments, an anti-glare layer is generally provided on the first surface 11 of the cover plate 1 . Therefore, the first functional layer 3 may generally not be provided on the first surface 11 of the cover plate 1 .

[0104] In some embodiments, the first functional layer 3 is any one of silicon oxide, fluoride, and silicon nitride.

[0105] Among the low-reflection display modules (such as the display modules provided in Figures 6a-6c in the embodiments of the present disclosure) and the ordinary display modules (such as the display modules corresponding to Figure 5b), the display module corresponding to Figure 6b has the lowest reflectivity, and the ordinary display module corresponding to Figure 5b has the highest reflectivity.

[0106] Figure 7 is a comparison diagram of the visual effects of the two display modules provided by the embodiment of the present disclosure under the external environment. Among them, the comparison diagram is a comparison photo of the low-reflection display module and the ordinary display module under the external environment obtained by adjusting the display products corresponding to Figures 6b and 5b to the same brightness (that is, the same backlight brightness) and observing them under the same external environment. The picture on the left side of Figure 7 is the visual effect picture of the low-reflection display module corresponding to Figure 6b, and the picture on the right side is the visual effect picture of the ordinary display module of Figure 5b. As shown in Figure 7, the brightness of the two display modules is the same, and it can be clearly seen that the low-reflection display module (Figure 6b) has better picture visibility than the ordinary display module (Figure 5b), the ambient light contrast is higher, and the picture color gamut performance is better.

[0107] The embodiment of the present disclosure determines through analysis that the ambient light contrast (ACR) affects the display effect of the display module, further determines that the reflectivity of the display module affects the ACR, and further reduces the reflectivity of the display module by providing a first functional layer 3 on at least one of the first surface 11, the second surface 12 of the cover plate 1, and the side of the display panel 2 close to the second surface of the cover plate 1 in the display module, thereby further improving the ACR and enhancing the display effect of the display module in the external environment. Compared with the prior art method of improving the reflectivity of the display module by increasing the backlight brightness of the display module, the display module provided by the embodiment of the present disclosure uses low backlight brightness, is low-cost, has a longer service life, and does not cause light pollution.

[0108] FIG8 is a structural block diagram of another display module provided by an embodiment of the present disclosure. As shown in FIG8 , the display module includes not only a cover plate 1 , a display panel 2 , and a first functional layer 3 , but also a determination module 4 , a calculation module 5 , and an adjustment module 6 .

[0109] In some embodiments, the determination module 4 is configured to determine the reflectivity of the display module based on the first functional layer 3; the calculation module 5 is configured to calculate the backlight brightness of the display module based on the reflectivity of the display module and the first mapping relationship; the first mapping relationship is the correspondence between the reflectivity of the display module and the backlight brightness; the adjustment module 6 is configured to adjust the current backlight brightness of the display module based on the backlight brightness of the display module obtained by the calculation module 5.

[0110] Specifically, from the above analysis, it can be seen that under the same external environment, the factors affecting ACR include not only the reflectivity of the display module, but also the brightness of the display module (that is, the backlight brightness). Figure 9 is a graph of the ACR of a display module with different reflectivity and the backlight brightness of the display module provided by an embodiment of the present disclosure. As shown in Figure 9, the curve was obtained in an actual outdoor environment at noon, when display modules with reflectivities of 5.14%, 9%, 9.1%, and 12.1% were all placed vertically and the ambient light illumination on the surface of the display module was 50,000 lux. Through actual testing, a curve showing that the ACR of the display module changes with the backlight brightness of the display module was obtained.

[0111] As can be seen from Figure 9, for display modules with different reflectivity, when the backlight brightness of the display modules is the same, the corresponding ACR is also different, that is, the display effects of the display modules are different. Therefore, for reflective modules with different reflectivity, if you want to achieve the same display effect, you need to have corresponding different backlight brightness. For display modules with the same reflectivity, when other conditions are the same, the higher the backlight brightness of the display module and the larger the ACR, the better the display effect of the display module. In addition, because the backlight brightness of the display module is too high, not only does it require too high backlight power consumption, it also generates a lot of heat, affecting the life of the display module. Therefore, for the backlight brightness of display modules with the same reflectivity, it is necessary to take into account both the display effect and the life of the display module to determine the optimal backlight brightness of the final display module.

[0112] The first mapping relationship is the correspondence between the reflectivity and backlight brightness of the display module. Specifically, the backlight brightness of a display module with a certain reflectivity under external light is used as a reference standard. Based on the proportional relationship between the reflectivity of the display module to be determined and the reflectivity of the reference standard display module, the relationship between the backlight brightness of the display module to be determined and the backlight brightness of the reference standard display module is determined to determine the backlight brightness of the display module to be determined. That is, the reflectivity of the display module to be determined / the reflectivity of the reference standard module = the backlight brightness of the display module to be determined / the backlight brightness of the reference standard module.

[0113] In some embodiments, the first mapping relationship can also be a correspondence between the reflectivity of the display module and the brightness of the display module. Specifically, the brightness of the display module refers to the actual brightness of the display module under the combined effect of the backlight brightness of the display module and the ambient light illumination. Therefore, when the external ambient light illumination is the same, the backlight brightness of the display module is equivalent to the brightness of the display module. When the backlight brightness of the display module remains unchanged, the intensity of the external ambient light illumination can also be equivalent to the brightness of the display module, and the ambient light illumination intensity can be directly measured by the photosensitive sensor in the display module, which is easier to obtain. It should be noted that the ambient light illumination mentioned in the embodiment of the present disclosure refers to the actual ambient light intensity of the outside world, while the ambient light intensity refers to the ambient light intensity detected by the photosensitive sensor 7 in the display module after the ambient light illumination is irradiated on the surface of the display module. The two are not necessarily equal. For example, when the screen is blocked, the intensity of the ambient light irradiated on the surface of the display module is less than the actual external ambient light intensity, that is, the ambient light intensity is less than the ambient light illumination.

[0114] An ordinary display module in the prior art is experimentally measured under the external ambient light intensity (generally 50,000 lux). When it meets the display effect requirements, the brightness of the ordinary display module is 3500 nit. The ordinary display module is hereinafter referred to as a 3500 nit outdoor high-brightness display module; the low-reflection display module in the embodiment of the present disclosure is experimentally measured under the external ambient light intensity (generally 50,000 lux). When it meets the display effect requirements, the brightness of the display module is 1200 nit. The low-reflection display module is hereinafter referred to as a 1200 nit low-reflection display module; this is explained as an example.

[0115] According to the ACR calculation formula:

[0116] Where, βw=π*(L255 brightness 环境光照度下 - L255 brightness 暗室下 ) / ambient light illumination screen L255 picture; βb=π*(L0 brightness 环境光照度下 - L0 brightness 暗室下 ) / Ambient light illumination screen L0 screen.

[0117] Among them, the ambient light contrast ratio ACR is the brightness of the product when the display product is exposed to ambient light. βw represents the parameters of the display product in a bright environment, and βb represents the parameters of the display product in a dark environment. Ambient light intensity refers to the actual ambient light intensity of the outside world. Ambient light intensity refers to the ambient light intensity detected by the light sensor 7 in the display module after the ambient light irradiates the surface of the display module. L255 brightness 暗室下 Refers to the brightness of the light emitted by the display module when it displays a 255 grayscale image in a dark room; L0 brightness 暗室下 Refers to the brightness of the light emitted by the display module in a dark room when the display screen is at 0 grayscale. L255 brightness 环境光照度下 It refers to the ambient light intensity detected by the photosensor 7 when the display module displays a 255 grayscale image and the ambient light hits the surface of the display module; L0 brightness ambient light illumination refers to the ambient light intensity detected by the photosensor 7 when the display module displays a 0 grayscale image and the ambient light hits the surface of the display module.

[0118] Table 3 shows the measured ACR data for a 1200-nit low-reflection display module and a 3500-nit outdoor high-brightness display module under different ambient light intensities. The ACR data for both the 3500-nit outdoor high-brightness display module and the 1200-nit low-reflection display module were measured, yielding the test data shown in Table 3.

[0119] Table 3. ACR measured data of 1200nit low-reflection display module and 3500nit outdoor high-brightness display module under different ambient light intensities

[0120] Combined with the measured data in Table 3, formula (1) is sorted out:

[0121] For 1200nit low-reflection display modules:

[0122] a. When the ambient light intensity is ≤10000 lux, the ambient light intensity *βw / π is much smaller than that in the darkroom with L255 brightness.

[0123] b. When the ambient light intensity is greater than 10000 lux, βw≈βb,

[0124] For 3500nit outdoor high-brightness display modules, compared with 1200nit low-reflection display modules, the 3500nit outdoor high-brightness display modules have the following rules:

[0125] 1200nit in a dark room with L255 brightness = 1200nit in a dark room with L255 brightness * 2.3

[0126] L0 brightness in a dark room 1200nit = L0 brightness in a dark room 1200nit * 2.4

[0127] According to the definition of reflectivity, βb≈Ref.Ref(3500nit Normal LCM with AG CG)=Ref(1200nit Low Reflection LCM with AG / AR CG)*2.34, so βb 3500nit =βb 1200nit *2.34

[0128] Among them, Ref (3500nit Normal LCM with AG CG) refers to the reflectivity of the display product corresponding to the 3500nit outdoor high-brightness display module; Ref (1200nit low-reflection LCM with AG / ARCG) refers to the reflectivity of the display product corresponding to the 1200nit low-reflection display module.

[0129] a. When the ambient light intensity is ≤10000 lux, the ambient light intensity *βw / π is much smaller than that in the darkroom with L255 brightness.

[0130] b. When the ambient light intensity is greater than 10000 lux, βw≈βb,

[0131] Based on the above data analysis, to achieve the same ACR as a standard outdoor high-brightness display module under the same ambient light intensity, the optimal low-reflection display module design requires the following: the ratio of the reflectivity of the low-reflection display module to the reflectivity of a standard outdoor high-brightness display module should be consistent with the ratio of the brightness of the low-reflection module to the brightness of a standard outdoor high-brightness display module. In other words, the reflectivity of the low-reflection display module / the reflectivity of the standard outdoor high-brightness display module = the brightness of the low-reflection display module / the brightness of the standard high-brightness display module.

[0132] Furthermore, products using the aforementioned low-reflection display modules are called low-reflection display products, and products using outdoor high-brightness display modules are called outdoor high-brightness display products. Table 4 is a design comparison table of low-reflection display products and outdoor high-brightness display products.

[0133] Table 4. Comparison of outdoor high-brightness display products and low-reflection display products

[0134] Among them, a star-shaped LED structure consists of multiple small LEDs encapsulated with phosphor. These LEDs are generally smaller in size and have a narrower light emission angle. Therefore, to achieve the same display effect, more LEDs are required when using this design, resulting in a "starry sky" look. Lens-shaped LEDs, on the other hand, incorporate lenses to increase the light emission angle and reduce the light mixing distance. Therefore, to achieve the same display effect, fewer LEDs are required when using this design. For example, when a low-reflection display product achieves the same display effect as an outdoor high-brightness display product, the outdoor high-brightness display product has a target module brightness of 3500 nits, uses a star-shaped LED structure, uses 1152 LEDs, has a voltage of 2.8V per LED, and has a backlight power consumption of 401W. At a room temperature of 25°C, the measured display module backplane temperature is 55.1°C, and the display panel surface temperature is 45.5°C. The low-reflection display product has a target module brightness of 1200 nits, uses a lens-shaped LED structure, uses 192 LEDs, has a voltage of 6.4V per LED, and has a backlight power consumption of 153W. At a room temperature of 25°C, the measured display module backplane temperature is 36.2°C, and the display panel surface temperature is 34.2°C. Compared with the outdoor high-brightness display product, the low-reflection display product has a power consumption reduction of 248W, or 62%, while the backplane temperature decreases by 18.9°C and the panel surface temperature decreases by 11.3°C.

[0135] This shows that low-reflection display modules can effectively reduce the temperature of the display module and protect the display panel function. Tests have shown that under the same ambient temperature of 38°C and direct sunlight, a 3500nit outdoor high-brightness display module experienced a black screen due to liquid crystal polarization, while a 1200nit low-reflection display module displayed normally.

[0136] In some embodiments, the first mapping relationship may also be a pre-stored correspondence between the reflectivity of the display module and the backlight brightness. The present disclosure may search for the reflectivity corresponding to the display module based on the first mapping relationship to obtain the backlight brightness of the display module to be determined, but this disclosure is not limited thereto.

[0137] In some embodiments, the brightness of a low-reflection module with a reflectivity of 9.1% should be 2400 nit, the brightness of a low-reflection module with a reflectivity of 9.0% should be 2200 nit, and the brightness of a low-reflection module with a reflectivity of 5.14% should be 1200 nit.

[0138] The adjustment module 6 in the embodiment of the present disclosure adjusts the backlight brightness of the display module by the reflectivity of the display module, which not only enables the display module to meet the best display effect, but also ensures that the backlight power consumption of the display module is not too high, avoiding obvious temperature rise of the display module and affecting the life of the display module.

[0139] In some embodiments, the determination module 4 is further configured to determine the reflectivity of the display module and the backlight brightness of the display module; the calculation module 5 is further configured to generate a Gamma curve based on the backlight brightness of the display module and the reflectivity of the display module and according to a preset algorithm; the adjustment module 6 is further configured to adjust the grayscale voltage to be written according to the Gamma curve so that the display module displays according to the written grayscale voltage.

[0140] Specifically, the ordinary display module and the low-reflection display module are still used as examples for explanation. Figure 10 is a schematic diagram of grayscale photos of the ordinary display module and the low-reflection display module provided in an outdoor environment according to an embodiment of the present disclosure. Among them, the three pictures in Figure 10 are, from left to right, a 3500nit ordinary display module with a reflectivity of 12%, a 2400nit low-reflection module with a reflectivity of 9.1%, and a 1200nit low-reflection module with a reflectivity of 5.14%. As shown in Figure 10, by comparing the grayscales of the 3500nit ordinary display module and the 1200nit low-reflection display module under outdoor conditions, it is found that the low-reflection display module has display abnormalities in the high grayscale and low grayscale parts, and the display abnormality should be related to different ambient light illuminations.

[0141] While the gamma curves for the three display modules in Figure 10 were all tuned based on a standard 3500-nit display module, the low-reflectivity module exhibits an overall dimming effect. This results in difficulty discerning dark details when playing dark images. Therefore, when adjusting the backlight brightness of the low-reflectivity display module to 2400 nit or 1200 nit, the gamma curve needs to be re-optimized for the corresponding display module. Furthermore, display modules with different reflectivity under the same backlight brightness also require their own gamma curves to match.

[0142] It should be noted that the embodiments of the present disclosure are only illustrated by taking a 2400nit low-reflection module with a reflectivity of 9.1% and a 1200nit low-reflection module with a reflectivity of 5.14% as examples. For different reflectivities and different backlight brightness, the adjustment module 6 of the display module in the embodiments of the present disclosure can adjust the grayscale voltage to be written to achieve the optimal display effect.

[0143] In the display module of the embodiment of the present disclosure, for display modules with different backlight brightness and different reflectivity, the calculation module 5 calculates and generates corresponding Gamma curve debugging, and the adjustment module 6 adjusts the grayscale voltage to be written according to the corresponding Gamma curve to ensure that the display effect observed by the human eye is in the optimal state under various conditions.

[0144] FIG11 is a structural block diagram of another display module provided by an embodiment of the present disclosure.

[0145] In some embodiments, the display module includes not only a cover plate 1 , a display panel 2 and a first functional layer 3 , but also a photosensor 7 , a calculation module 5 and an adjustment module.

[0146] Among them, the photosensor 7 is configured to detect the ambient light intensity in real time; the calculation module 5 is configured to calculate the current ambient light contrast based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the ambient light intensity detected by the photosensor 7 when the display module displays the first grayscale image, and the ambient light intensity detected by the photosensor 7 when the display module displays the second grayscale image; the adjustment module 6 is configured to adjust the backlight brightness of the display module according to the current ambient light contrast based on the pre-stored correspondence between the ambient light contrast and the backlight brightness of the display module.

[0147] Specifically, due to the high product temperature of existing ordinary display modules, in order to ensure the service life of the product and to realize the green and energy-saving characteristics of the display module, it is necessary to adjust the backlight brightness of the display module in real time according to the ambient light brightness. However, this method of adjusting the backlight brightness of the display module in real time according to the outdoor ambient light brightness cannot obtain the most scientific visual effect of the display module. It can be seen from the above that the factors affecting the display effect of the display module include not only the reflectivity of the display module, but also the current ambient light contrast ACR. At the same time, according to formula (1) in the above text, it can be seen that ACR is related to the current ambient light intensity and the backlight brightness of the display module. Since the ambient light intensity changes in real time at different times in different environments, in order to ensure that the display effect of the display module in any environment and at any time can meet the requirements, it is necessary to adjust the backlight brightness of the display module in real time according to the real-time ambient light intensity.

[0148] The display module in the embodiment of the present disclosure is provided with a photosensor 7 for real-time detection of the current ambient light intensity. According to the above formula (1), the calculation module 5 calculates the current ACR based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the ambient light intensity detected by the photosensor 7 when the display module displays the first grayscale image, and the ambient light intensity detected by the photosensor 7 when the display module displays the second grayscale image, and then adjusts the backlight brightness of the display module according to the current ACR. Among them, the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room is determined by the backlight brightness of the display module.

[0149] The display module in the embodiment of the present disclosure detects the ambient light intensity in real time by setting a photosensor 7 to detect the current ACR in real time, so that the adjustment module 6 adjusts the backlight brightness of the display module in real time according to the correspondence between the ACR and the backlight brightness of the display module, thereby ensuring that the display effect of the display module can meet the requirements in different environments.

[0150] In some embodiments, the adjustment module 6 includes a judgment unit 61 and an adjustment unit 62, wherein the judgment unit 61 is configured to judge whether the current ambient light contrast is less than the preset ambient light contrast; the adjustment unit 62 adjusts the backlight brightness of the display module according to the corresponding relationship between the ambient light contrast and the backlight brightness of the display module in response to the current ambient light contrast being less than the preset ambient light contrast.

[0151] Specifically, the preset ambient light contrast refers to the ambient light contrast corresponding to when the display module meets the preset display effect. The greater the ambient light contrast of the display module, the better its display effect. In some embodiments, to achieve a better visual display effect, the preset ambient light contrast is generally greater than or equal to 10. If the judgment unit 61 determines that the current ambient light contrast is less than the preset ambient light contrast, it means that the display effect of the current display module does not meet the display effect requirement, and the adjustment unit 62 needs to adjust the backlight brightness of the display module to meet the display effect requirement. The specific process is to adjust the backlight brightness of the current display module to the backlight brightness of the display module corresponding to the preset ambient light contrast based on the correspondence between the ambient light contrast and the backlight brightness of the display module. Of course, the backlight brightness of the current display module can also be adjusted to the backlight brightness of the display module corresponding to the ambient light contrast greater than the preset ambient light contrast, and this disclosure is not limited to this. Conversely, if the judgment unit 61 determines that the current ambient light contrast is greater than or equal to the preset ambient light contrast, it means that the display effect of the current display module meets the display effect requirement, and the adjustment unit 61 does not need to adjust the backlight brightness of the display module.

[0152] In some embodiments, the adjustment unit 62 modulates the pulse width modulation (PWM) signal between the system board and the converter to control the magnitude of the converter output current to adjust the backlight brightness, thereby enabling the display module to perform real-time backlight brightness adjustment with reference to its current ACR value.

[0153] The display module in the embodiment of the present disclosure sets a judgment unit 61 in the adjustment module 6. The adjustment unit 62 will only make adjustments when the judgment result of the judgment unit 61 does not meet the requirements, so that the adjustment unit 62 avoids redundant operations and is more efficient.

[0154] In some embodiments, the display module includes multiple photosensors 7, and the calculation module 5 includes a comparison unit 51 and a calculation unit 52. The comparison unit 51 is configured to obtain the maximum and minimum values ​​of the ambient light intensity values ​​detected in real time by the multiple photosensors 7, and calculate the difference between the two, recorded as a first difference, and compare the first difference with a preset threshold; the calculation unit 52 is configured to calculate the average value of the multiple ambient light intensities detected in real time by the multiple photosensors 7 in response to the first difference being less than the preset threshold; the calculation unit 52 is also configured to calculate the ambient light contrast based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the average value of the multiple ambient light intensities detected in real time by the multiple photosensors 7 when the display module displays the first grayscale image, and the average value of the multiple ambient light intensities detected in real time by the multiple photosensors 7 when the display module displays the second grayscale image.

[0155] Specifically, the multiple photosensitive sensors 7 in the display module are arranged at different positions of the display module, and are used to test the ambient light intensity corresponding to different positions of the display module. Figure 12 is a schematic diagram of the detection effective area of ​​the display screen of a display module provided by an embodiment of the present disclosure, wherein TEST is the test position, and the test position corresponds one-to-one to the position of the photosensitive sensor 7 in the display module. In order to ensure the accuracy of the test data, the number of photosensitive sensors 7 should be greater than or equal to 2. The embodiment of the present disclosure is described with the number of photosensitive sensors 7 being 3. Of course, the number of photosensitive sensors 7 can also be set to other values, and the present disclosure does not impose any restrictions on this. In addition, the position of the photosensitive sensor 7 should avoid a height that consumers can touch to prevent the accuracy of the test data from being affected by blocking the light on the screen surface when consumers watch the picture. At the same time, it should avoid the center area of ​​the picture to avoid affecting the consumer's viewing experience.

[0156] In order to prevent the problem of inconsistent results of multiple photosensors 7 due to partial occlusion of the picture, the display module in the embodiment of the present disclosure determines whether the current display picture is occluded by comparing the differences between the measurement results of multiple photosensors 7.

[0157] FIG13 is a flow chart of an ambient light intensity test provided by an embodiment of the present disclosure. As shown in FIG13 , this embodiment is described by taking the display module including three light sensors 7 as an example. The specific measurement method is as follows:

[0158] S1. The three light sensors 7 respectively detect the ambient light intensity at corresponding positions.

[0159] S2, the comparison unit 51 compares the measurement results of the three photosensitive sensors 7 in pairs to obtain three groups of comparison differences, and compares the three groups of comparison differences with the preset thresholds respectively; when the three groups of comparison differences are all smaller than the preset thresholds, it means that the measurement results obtained by the three photosensitive sensors 7 are all within the error range, and there is no screen occlusion problem, and S3 is executed.

[0160] When the three groups of comparison differences are greater than or equal to the preset threshold, it indicates that the current screen may be partially blocked, and the above steps S1 and S2 are re-executed until the three groups of comparison differences are all less than the preset threshold, and then S3 is executed.

[0161] If the three light sensors 7 re-measure multiple times (for example, after three re-measurements), and the difference between the three sets of comparisons is still greater than or equal to the preset threshold, the measurement can be repeated after a period of time (for example, thirty minutes). At this time, if the difference between the three sets of comparisons is still greater than or equal to the preset threshold, it indicates that the current screen may be blocked by a foreign object. At this time, the background alarm system will be triggered, prompting the management personnel to confirm whether there is any foreign object blocking the display module on site. The module brightness will be adjusted based on the test parameters of the previous day.

[0162] S3. The calculation unit 52 calculates the average value of the three measurement results of the three light sensors 7 as the current ambient light intensity, and calculates the corresponding ACR.

[0163] In some embodiments, the comparison unit 51 may only obtain the maximum and minimum values ​​of the ambient light intensity values ​​detected in real time by the multiple light sensors 7, calculate the difference between the two, and record it as a first difference, and compare the first difference with a preset threshold. The first difference is the maximum difference between any two of the ambient light intensity values ​​detected in real time by the multiple light sensors 7. If the first difference is less than the preset threshold, then the other differences are definitely less than the preset threshold. Therefore, in order to reduce the calculation process and improve efficiency, the comparison unit 51 may only calculate the first difference between the maximum and minimum values ​​of the ambient light intensity values ​​detected in real time by the multiple light sensors 7.

[0164] It is understood that the ambient light contrast is related to both the ambient light intensity detected by the light sensor 7 when the display module displays the first grayscale image and the ambient light intensity detected by the light sensor 7 when the display module displays the second grayscale image. Therefore, the ambient light intensity test process corresponding to FIG13 above requires performing ambient light intensity tests when the display module displays the first grayscale image and when the display module displays the second grayscale image. The ambient light intensity test processes for both are similar, except that the grayscales of the display modules' displayed images differ.

[0165] In some embodiments, the display module can automatically switch test images based on ambient light intensity test instructions. The display module is pre-loaded with a first grayscale image and a second grayscale image, where the first grayscale image can be an L255 image and the second grayscale image can be an L0 image. Furthermore, during the ambient light intensity test, the backlight power consumption of the local dimming area corresponding to the test area of ​​the display module should be switched to maximum power consumption to facilitate accurate dimming of the system.

[0166] In some embodiments, depending on the external ambient light illumination, the ambient light intensity difference values ​​of different test points under the L0 screen, such as brightness 1-brightness 2, or brightness 3-brightness 2, or brightness 3-brightness 1, should refer to the ambient light illumination ≤1000lux, the ambient light intensity difference can be adjusted to 2; when the ambient light illumination ≤10000lux and the ambient light illumination >1000lux, the ambient light intensity difference can be adjusted to 10; when the ambient light illumination >10000lux, the ambient light intensity difference can be adjusted to 20.

[0167] In some embodiments, the difference in ambient light intensity between different test points in the L255 image may be 50.

[0168] Of course, the difference in ambient light intensity between different test points in the L0 screen and the L255 screen may also be other values, and the present disclosure does not impose any limitation on this.

[0169] In some embodiments, the display module can perform ambient light intensity tests on the test area of ​​the display screen in the morning, noon, and evening. The specific test time can be adjusted according to summer and winter, and can also be adjusted according to the sunrise and sunset times in different regions. Based on the tested ambient light intensity, the display module's ambient light contrast ratio is calculated. Referring to a preset display module brightness and ACR relationship curve, the backlight brightness is adjusted to obtain the ideal display module ACR value.

[0170] Continuing with FIG11 , in some embodiments, the display module includes not only a cover plate 1, a display panel 2, a first functional layer 3, a light sensor 7, a calculation module 5, and an adjustment module 6, but also a calibration module 8. The calibration module 8 is configured to calibrate the backlight brightness of the display module based on a maximum backlight power consumption threshold at a preset time in response to the ambient light intensity detected by the light sensor not meeting a brightness value within a preset range when the display module displays a preset grayscale image.

[0171] Specifically, due to the high operating temperature of the display module, the life of the LED (backlight source) in the display module decreases faster than that of conventional display products, resulting in the actual backlight brightness of the display module being less than the required backlight brightness (that is, the preset backlight brightness value), further affecting the display effect of the display module. In order to ensure the best display effect of the display module, it is necessary to regularly calibrate the backlight brightness of the display module at a preset time. The preset time can be every month or every half a month; since the life of the LED in the display module decreases relatively slowly in the early stage and decreases relatively quickly in the later stage, the preset time can also be calibrated once every month in the first period of time, and once every half a month in the later period of time. This is not limited in the present disclosure.

[0172] Furthermore, when calibration module 8 calibrates the display module's backlight brightness, it must be performed under a preset ambient light intensity and a preset grayscale image. In other words, the backlight brightness calibration environment must be specific, and the preset range of brightness values ​​must be determined based on this calibration environment. Otherwise, it will be difficult to determine the current display module's backlight brightness range. For example, the calibration environment can be an ambient light intensity of ≤50 lux, and the preset grayscale image can be a display image of L255 or L0. When the ambient light intensity is ≤50 lux, the display module automatically activates the backlight brightness calibration function. Simultaneously, the display module switches the test area described above to a display image of L255 or L0. The photosensor 7 measures the brightness of the screen surface at L255 or L0 in real time. The calibration module then adjusts the backlight brightness to increase the brightness of the L255 image. Optical parameters such as contrast and color gamut are also tested. If the difference is greater than 10% with the preset optical parameters, an automatic alarm can be triggered, alerting backstage staff that a display problem has occurred with the display module and recommending that the staff inspect the instrument.

[0173] The specific execution process of the display module is as follows: the display module collects ambient light intensity data through the light sensor 7 for judgment and processing. When the collected ambient light intensity data is less than the preset value, the backlight brightness of the display module is increased by increasing the PWM duty of the backlight cross-flow board to increase the current of the cross-flow board to control the light bar. The ambient light intensity data during the adjustment process is detected in real time. When the difference between the adjusted ambient light intensity and the preset value is less than 1%, the backlight brightness calibration is determined to be successful and prompt feedback is given. If the system detects that the ambient light intensity data deviates significantly from the attenuation rate curve under normal use, and the difference is greater than 10%, the system determines that the collected data is incorrect and prompts feedback.

[0174] However, due to the limited lifespan of the LEDs in the display module, after a certain period of use, even after calibration by the calibration module 8, the backlight brightness of the display module may not reach the required actual backlight brightness. Therefore, the disclosed embodiment can set a maximum backlight power consumption threshold based on the lifespan of the display module. The calibration module 8 calibrates the backlight brightness based on this maximum backlight power consumption threshold to ensure that the backlight brightness can be calibrated by the calibration module 8 throughout the lifespan of the display module to achieve a display effect that meets the requirements.

[0175] The disclosed embodiment reduces the reflectivity of the display module surface by providing a first functional layer 3 on the display module, thereby reducing the reflection of high-brightness ambient light on the display module surface, thereby improving the display quality. Simultaneously, the display module's dimming mechanism is optimized, using the display module's ambient light contrast as a reference factor to perform dual grayscale and brightness adjustments, better adapting to different scenarios.

[0176] Based on the same inventive concept, the embodiment of the present disclosure also provides a display method based on a display module, wherein the display method is applied to any display module in the above embodiments, and the method includes step S100: writing a grayscale voltage to the display module to enable the display module to display.

[0177] FIG15 is a flow chart of a display method provided in an embodiment of the present disclosure.

[0178] In some embodiments, as shown in FIG15 , the method not only includes step S100, but also includes:

[0179] S151: Obtaining a reflectivity of a display module and a first mapping relationship.

[0180] S152: Calculating the backlight brightness of the display module according to the reflectivity of the display module and a first mapping relationship; wherein the first mapping relationship is a correspondence between the reflectivity of the display module and the backlight brightness.

[0181] S153: Based on the backlight brightness of the display module, adjust the current backlight brightness of the display module.

[0182] The disclosed embodiment adjusts the backlight brightness of the display module based on the reflectivity of the display module, which not only enables the display module to meet the best display effect, but also ensures that the backlight power consumption of the display module is not too high, avoiding a significant temperature rise in the display module and affecting the life of the display module.

[0183] FIG16 is a flow chart of another display method provided by an embodiment of the present disclosure.

[0184] In some embodiments, as shown in FIG16 , the display method not only includes step S100, but also includes:

[0185] S161: Determine the reflectivity of the display module and the backlight brightness of the module.

[0186] S162: Generate a gamma curve according to a preset algorithm based on the backlight brightness of the display module and the reflectivity of the display module.

[0187] S163: Adjusting the grayscale voltage to be written according to the Gamma curve, so that the display module displays according to the written grayscale voltage.

[0188] The display module in the embodiment of the present disclosure calculates and generates corresponding Gamma curve debugging for display modules with different backlight brightness and different reflectivity, and adjusts the grayscale voltage to be written according to the corresponding Gamma curve to ensure that the display effect observed by the human eye is in the optimal state under various conditions.

[0189] FIG17 is a flow chart of another display method provided in an embodiment of the present disclosure.

[0190] In some embodiments, as shown in FIG17 , the display method not only includes step S100, but also includes:

[0191] S171: Obtain the light output brightness when the display module displays the first grayscale image and the second grayscale image in the dark room, the ambient light intensity detected by the light sensor 7 when the display module displays the first grayscale image, and the ambient light intensity detected by the light sensor 7 when the display module displays the second grayscale image.

[0192] S172: Calculate the current ambient light contrast based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in the dark room, the ambient light intensity detected by the photosensor 7 when the display module displays the first grayscale image, and the ambient light intensity detected by the photosensor 7 when the display module displays the second grayscale image.

[0193] S173: adjusting the backlight brightness of the display module according to the current ambient light contrast and based on a pre-stored correspondence between the ambient light contrast and the backlight brightness of the display module.

[0194] The disclosed embodiment adjusts the backlight brightness of the display module according to the real-time ambient light contrast, so that the display module can meet the display effect requirements in real time.

[0195] In some embodiments, step S173 specifically includes: determining whether the current ambient light contrast is less than the preset ambient light contrast; in response to the current ambient light contrast being less than the preset ambient light contrast, adjusting the backlight brightness of the display module according to the corresponding relationship between the ambient light contrast and the backlight brightness of the display module.

[0196] In some embodiments, the display module includes a plurality of light sensors, and step S172 specifically includes: when the display module displays a first grayscale image, obtaining a maximum value and a minimum value of the ambient light intensity detected by the plurality of light sensors, calculating a difference between the maximum value and the minimum value, recorded as a first difference, and comparing the first difference with a first preset threshold; in response to the first difference being less than the first preset threshold, calculating an average value of the ambient light intensity detected by the plurality of light sensors;

[0197] When the display module displays the second grayscale image, obtaining a maximum value and a minimum value of the ambient light intensities detected by the plurality of light sensors, calculating a difference between the maximum value and the minimum value, recorded as a second difference value, and comparing the second difference value with a second preset threshold value; in response to the second difference value being less than the second preset threshold value, calculating an average value of the ambient light intensities detected by the plurality of light sensors;

[0198] The ambient light contrast is calculated based on the light output brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the average value of multiple ambient light intensities detected in real time by multiple photosensors when the display module displays the first grayscale image, and the average value of multiple ambient light intensities detected in real time by multiple photosensors when the display module displays the second grayscale image.

[0199] In some embodiments, the display method not only includes step S100, but also includes: at a preset time, in response to the ambient light intensity detected by the photosensor 7 not meeting the brightness value within a preset range when the display module displays a preset grayscale image, calibrating the backlight brightness of the display module based on the maximum backlight power consumption threshold.

[0200] In the embodiment of the present disclosure, the backlight brightness is calibrated based on the maximum backlight power consumption threshold of the display module to ensure that the backlight brightness can be calibrated by the calibration module 8 during the life cycle of the display module to achieve a display effect that meets the requirements.

[0201] Other details in the display method embodiment provided in the present disclosure are similar to the details in the above-mentioned display module embodiment and will not be repeated here.

[0202] The display method provided in the embodiments of the present disclosure is applicable to any of the aforementioned display modules. By providing a first functional layer 3 on the display module, the reflectivity of the display module surface is reduced, thereby reducing the reflection of high-brightness ambient light on the display module surface, thereby improving the display quality. Simultaneously, the dimming mechanism of the display module is optimized, using the display module's ambient light contrast as a reference factor to perform dual grayscale and brightness adjustments, thereby better adapting to different scenarios.

[0203] Based on the same inventive concept, an embodiment of the present disclosure also provides a computer-readable storage medium on which a computer program code for a display method based on a display module is stored. When the computer program code is executed by a processor, any one of the above-mentioned display method embodiments based on a display module is implemented.

[0204] Based on the same inventive concept, an embodiment of the present disclosure further provides an electronic device, comprising:

[0205] A processor; a memory for storing processor-executable instructions, wherein the processor is configured to call the instructions stored in the memory to execute any one of the above-mentioned display method embodiments based on the display module.

[0206] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display module, comprising: A cover plate, including a first surface and a second surface arranged opposite to each other; A display panel, disposed on one side of the second surface of the cover plate; A first functional layer, configured to reduce the reflectivity of the display module, wherein the first functional layer is disposed on at least one of the first surface of the cover plate, the second surface of the cover plate, and the side of the display panel close to the second surface of the cover plate.

2. The display module according to claim 1, wherein, It further includes a polarizer, disposed on the side of the display panel close to the second surface of the cover plate, and the polarizer serves as the first functional layer.

3. The display module according to claim 1, wherein, The first functional layer is any one of silicon oxide, fluoride, and silicon nitride.

4. The display module according to claim 1, wherein, It further includes: A determination module, configured to determine the reflectivity of the display module according to the first functional layer; A calculation module, configured to calculate the backlight brightness of the display module according to the reflectivity of the display module and a first mapping relationship; The first mapping relationship is the corresponding relationship between the reflectivity and the backlight brightness of the display module; An adjustment module, configured to adjust the current backlight brightness of the display module based on the backlight brightness of the display module obtained by the calculation module.

5. The display module according to claim 1, wherein, It further includes: A determination module, configured to determine the reflectivity of the display module and the backlight brightness of the display module; A calculation module, configured to generate a Gamma curve based on the backlight brightness of the display module and the reflectivity of the display module according to a preset algorithm; An adjustment module, configured to adjust the gray-scale voltage to be written according to the Gamma curve, so that the display module displays according to the written gray-scale voltage.

6. The display module according to claim 1, wherein, It further includes: A photosensitive sensor, configured to detect the ambient light intensity in real time; A calculation module, configured to calculate the current ambient light contrast based on the light output brightness when the display module displays a first gray-scale screen and a second gray-scale screen in a dark room, the ambient light intensity detected by the photosensitive sensor when the display module displays the first gray-scale screen, and the ambient light intensity detected by the photosensitive sensor when the display module displays the second gray-scale screen; An adjustment module, configured to adjust the backlight brightness of the display module according to the current ambient light contrast based on the corresponding relationship between the ambient light contrast and the backlight brightness of the display module stored in advance.

7. The display module according to claim 6, wherein, The adjustment module includes a judgment unit and an adjustment unit, The judgment unit is configured to judge whether the current ambient light contrast is less than a preset ambient light contrast; The adjustment unit, in response to the current ambient light contrast being less than the preset ambient light contrast, adjusts the backlight brightness of the display module according to the corresponding relationship between the ambient light contrast and the backlight brightness of the display module.

8. The display module according to claim 6, wherein, The display module includes a plurality of photosensitive sensors, and the calculation module includes a comparison unit and a calculation unit, The comparison unit is configured to obtain the maximum value and the minimum value of the ambient light intensity values detected by the plurality of photosensitive sensors in real time, calculate the difference between the two, denoted as the first difference, and compare the first difference with a preset threshold; The calculation unit is configured to calculate the average value of the multiple ambient light intensities detected in real time by the multiple photosensitive sensors when the first difference is less than the preset threshold; The calculation unit is further configured to calculate the ambient light contrast based on the light emission brightness when the display module displays the first gray scale image and the second gray scale image in a dark room, the average value of the multiple ambient light intensities detected in real time by the multiple photosensitive sensors when the display module displays the first gray scale image, and the average value of the multiple ambient light intensities detected in real time by the multiple photosensitive sensors when the display module displays the second gray scale image; Calculate the ambient light contrast.

9. The display module according to claim 6, wherein, It further includes a calibration module, which is configured to calibrate the backlight brightness of the display module based on the maximum backlight power consumption threshold when the ambient light intensity detected by the photosensitive sensor does not meet the brightness value within the preset range when the display module displays a preset gray scale image at a preset time.

10. A display method based on a display module, wherein, The display method is applied to the display module according to any one of claims 1-9, and the method includes: writing a gray scale voltage to the display module to enable the display module to display.

11. The display method according to claim 10, wherein, The method further includes: Obtain the reflectivity of the display module and the first mapping relationship; Calculate the backlight brightness of the display module according to the reflectivity of the display module and the first mapping relationship; wherein, the first mapping relationship is the corresponding relationship between the reflectivity of the display module and the backlight brightness; Adjust the current backlight brightness of the display module based on the backlight brightness of the display module.

12. The display method according to claim 10, wherein, The method further includes: Determine the reflectivity of the display module and the backlight brightness of the display module; Generate a Gamma curve according to a preset algorithm based on the backlight brightness of the display module and the reflectivity of the display module; Adjust the gray scale voltage to be written according to the Gamma curve so that the display module displays according to the written gray scale voltage.

13. The display method according to claim 10, wherein, The method further includes: Obtain the light emission brightness when the display module displays the first gray scale image and the second gray scale image in a dark room, the ambient light intensity detected by the photosensitive sensor when the display module displays the first gray scale image, and the ambient light intensity detected by the photosensitive sensor when the display module displays the second gray scale image; Calculate the current ambient light contrast based on the light emission brightness when the display module displays the first gray scale image and the second gray scale image in a dark room, the ambient light intensity detected by the photosensitive sensor when the display module displays the first gray scale image, and the ambient light intensity detected by the photosensitive sensor when the display module displays the second gray scale image; Adjust the backlight brightness of the display module according to the current ambient light contrast based on the corresponding relationship between the ambient light contrast and the backlight brightness of the display module stored in advance.

14. The display method according to claim 13, wherein, The adjusting the backlight brightness of the display module according to the current ambient light contrast based on the corresponding relationship between the ambient light contrast and the backlight brightness of the display module stored in advance includes: Judge whether the current ambient light contrast is less than the preset ambient light contrast; In response to the current ambient light contrast being less than the preset ambient light contrast, the backlight brightness of the display module is adjusted according to the corresponding relationship between the ambient light contrast and the backlight brightness of the display module.

15. The display method according to claim 13, wherein, The display module includes a plurality of photosensitive sensors. The method for calculating the ambient light contrast based on the light emission brightness when the display module displays a first grayscale image and a second grayscale image in a dark room, the ambient light intensity detected by the photosensitive sensors when the display module displays the first grayscale image, and the ambient light intensity detected by the photosensitive sensors when the display module displays the second grayscale image includes: When the display module displays the first grayscale image, obtain the maximum value and the minimum value of the ambient light intensity detected by the plurality of photosensitive sensors, calculate the difference between the two, denoted as the first difference, and compare the first difference with a first preset threshold; In response to the first difference being less than the first preset threshold, calculate the average value of the ambient light intensity detected by the plurality of photosensitive sensors; When the display module displays the second grayscale image, obtain the maximum value and the minimum value of the ambient light intensity detected by the plurality of photosensitive sensors, calculate the difference between the two, denoted as the second difference, and compare the second difference with a second preset threshold; In response to the second difference being less than the second preset threshold, calculate the average value of the ambient light intensity detected by the plurality of photosensitive sensors; Calculate the ambient light contrast based on the light emission brightness when the display module displays the first grayscale image and the second grayscale image in a dark room, the average value of the multiple ambient light intensities detected in real time by the plurality of photosensitive sensors when the display module displays the first grayscale image, and the average value of the multiple ambient light intensities detected in real time by the plurality of photosensitive sensors when the display module displays the second grayscale image.

16. The display method according to claim 13, wherein, The method further includes: At a preset time, in response to the ambient light intensity detected by the photosensitive sensors not meeting the brightness values within a preset range when the display module displays a preset grayscale image, calibrate the backlight brightness of the display module based on the maximum backlight power consumption threshold.

17. A computer-readable storage medium, on which computer program code for a display method based on a display module is stored, and when the computer program code is run by a processor, the method according to any one of claims 10-16 is implemented.

18. An electronic device, wherein, It includes: A processor; A memory for storing instructions executable by the processor, wherein The processor is configured to call the instructions stored in the memory to execute the method according to any one of claims 10-16.

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