Display unit control method and related device

Abstract

The present disclosure relates to the field of display apparatuses. Disclosed are a display unit control method and a related device. The method comprises: acquiring a display mode option instruction of a target user, the term "display mode option instruction" comprising a shared mode option instruction and an anti-peeping mode option instruction; on the basis of the display mode option instruction, invoking a display mode grayscale control algorithm corresponding to the display mode option instruction, the term "display mode grayscale control algorithm" comprising a shared mode grayscale control algorithm and an anti-peeping mode grayscale control algorithm; and, on the basis of a grayscale input signal and the display mode grayscale control algorithm, controlling a grayscale output signal of a display unit.

Description

Display unit control method and related device Cross-reference to related applications

[0001] The present disclosure claims priority to Chinese Patent Application No. 202410831890.4, filed on June 25, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the field of display devices, and more particularly, to a display unit control method and related device. BACKGROUND

[0003] In certain specific scenarios, it is necessary to set a privacy display mode for the display unit, in which mode the display image on the display unit can be clearly viewed at a certain position, while the display image on the display unit cannot be effectively obtained at other angle positions.

[0004] In a related technology, the brightness at the normal viewing angle is reduced to improve the privacy effect. This can improve the privacy performance, but because the overall screen brightness is reduced, the viewing experience of the front passenger may be impaired.

[0005] Therefore, it is necessary to propose a display unit control method with better privacy effect and more flexibility to at least solve some of the deficiencies in the related art. SUMMARY

[0006] In a first aspect, the present disclosure provides a display unit control method, which comprises:

[0007] obtaining a display mode selection instruction of a target user, wherein the display mode selection instruction comprises a sharing mode selection instruction and a privacy mode selection instruction;

[0008] calling a corresponding display mode gray scale control algorithm based on the display mode selection instruction, wherein the display mode gray scale control curve comprises a sharing mode gray scale control algorithm and a privacy mode gray scale control algorithm;

[0009] controlling the gray scale output signal of the display unit based on the gray scale input signal and the display mode gray scale control algorithm.

[0010] In a feasible implementation, the sharing mode gray scale control algorithm is established based on a conventional gray scale control curve;

[0011] The privacy mode gray scale control algorithm is established based on a privacy gray scale control curve;

[0012] In the case where the gray scale input value of the privacy gray scale control curve is less than or equal to a first gray scale threshold value, all the gray scale output values are the first gray scale threshold value.

[0013] In the case that the gray scale input value of the above-mentioned privacy gray scale control curve is greater than or equal to the second gray scale threshold value, the privacy mode gray scale output value is equal to the normal gray scale output value.

[0014] In the case that the gray scale input value of the above-mentioned privacy gray scale control curve is greater than the first gray scale value and less than the second gray scale threshold value, the corresponding privacy mode gray scale output value is greater than the normal gray scale output value at the same gray scale input value.

[0015] In a possible implementation, in the case that the gray scale input value of the above-mentioned privacy gray scale control curve is greater than the first gray scale threshold value and less than the second gray scale threshold value, the method for determining the privacy mode gray scale output value specifically comprises:

[0016] determining a sum of the first luminance threshold value and the original luminance as a corrected luminance, wherein the first gray scale threshold value is determined based on the first luminance threshold value and the gray scale-luminance relationship;

[0017] determining a gray scale value corresponding to the corrected luminance based on the gray scale-luminance relationship;

[0018] determining the gray scale value corresponding to the corrected luminance as the privacy mode gray scale output value.

[0019] In a possible implementation, the method further comprises:

[0020] obtaining current ambient light intensity information of the display unit;

[0021] determining a first screen white state luminance, a first reflected ambient light luminance and a first contrast requirement threshold value of a first viewing position corresponding to the current ambient light intensity information, wherein the first viewing position is a position at which display information of the display unit can be effectively obtained in both the sharing mode and the privacy mode;

[0022] calculating a first reference luminance based on the first screen white state luminance, the first reflected ambient light luminance and the first contrast requirement threshold value;

[0023] determining a second screen white state luminance, a second reflected ambient light luminance and a second contrast requirement threshold value of a second viewing position corresponding to the current ambient light intensity information, wherein the second viewing position is a position at which display information of the display unit can be effectively obtained only in the sharing mode;

[0024] calculating a second reference luminance based on the second screen white state luminance, the second reflected ambient light luminance and the second contrast requirement threshold value;

[0025] determine the luminance attenuation coefficients of the first viewing position and the second viewing position based on an angle attenuation curve of the product;

[0026] determine a maximum value of the first candidate luminance under the condition that the first candidate luminance is less than or equal to the first reference luminance and the second candidate luminance is greater than or equal to the second reference luminance, wherein a ratio of the first candidate luminance to the second candidate luminance is the luminance attenuation coefficient;

[0027] set the maximum value of the first candidate luminance as the first luminance threshold.

[0028] In a possible implementation, the first contrast requirement threshold is greater than or equal to 13, the second contrast requirement threshold is less than or equal to 13, and a ratio of the first contrast requirement threshold to the second contrast requirement threshold is greater than or equal to 3.

[0029] In a possible implementation, the method further includes:

[0030] In a case where the first candidate luminance is less than or equal to the first reference luminance or the second candidate luminance is greater than or equal to the second reference luminance, the second contrast requirement threshold is reduced.

[0031] In a possible implementation, the first reference luminance is calculated based on the first screen white-state luminance, the first reflected ambient light luminance, and the first contrast requirement threshold, and the calculation includes:

[0032] calculating a first sum value of the first screen white-state luminance and the first reflected ambient light luminance;

[0033] calculating a first ratio of the first sum value to the first contrast requirement threshold;

[0034] determining a difference between the first ratio and the first reflected ambient light luminance as the first reference luminance.

[0035] In a possible implementation, the second reference luminance is calculated based on the second screen white-state luminance, the second reflected ambient light luminance, and the second contrast requirement threshold, and the calculation includes:

[0036] calculating a second sum value of the second screen white-state luminance and the second reflected ambient light luminance;

[0037] calculating a second ratio of the second sum value to the second contrast requirement threshold;

[0038] determining a difference between the second ratio and the second reflected ambient light luminance as the second reference luminance.

[0039] In a feasible implementation, the second gray scale threshold is determined based on a second brightness threshold,

[0040] The method further includes:

[0041] calculating a threshold sum value of the candidate second brightness threshold and the first brightness threshold;

[0042] determining a maximum value of the candidate second brightness threshold in a case that the threshold sum value is greater than a high first order brightness and less than a high second order brightness, and the candidate second brightness threshold is less than or equal to a preset multiple of the high first order brightness, wherein the candidate second brightness threshold is an Nth order corresponding brightness, the high first order brightness is an (N+1)th order corresponding brightness, and the high second order brightness is an (N+2)th order corresponding brightness;

[0043] determining the maximum value of the candidate second brightness threshold as the second brightness threshold.

[0044] In a second aspect, the disclosure provides a display unit control device, including:

[0045] an obtaining unit configured to obtain a display mode selection instruction of a target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction;

[0046] a calling unit configured to call a display mode gray scale control algorithm corresponding to the display mode selection instruction based on the display mode selection instruction, wherein the display mode gray scale control algorithm includes a sharing mode gray scale control algorithm and a privacy mode gray scale control algorithm;

[0047] a control unit configured to control a gray scale output signal of the display unit based on a gray scale input signal and the display mode gray scale control algorithm.

[0048] In a third aspect, an electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the display unit control method of any one of the first aspect when executing the computer program stored in the memory.

[0049] In a fourth aspect, the disclosure further provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executable by a processor to implement the display unit control method of any one of the first aspect.

[0050] In a fifth aspect, the disclosure further provides a display device including the electronic device of the third aspect.

[0051] In summary, the display unit control method of the embodiments of the present disclosure includes: obtaining a display mode selection instruction of a target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction; calling a corresponding display mode gray scale control algorithm based on the display mode selection instruction, wherein the display mode gray scale control curve includes a sharing mode gray scale control algorithm and a privacy mode gray scale control algorithm; and controlling a gray scale output signal of the display unit based on a gray scale input signal and the display mode gray scale control algorithm. The unique privacy mode gray scale control algorithm of the present disclosure limits the viewing angle, so that the content is only visible at the normal viewing angle, greatly improving the privacy protection of the user. Compared with the prior art, this method not only improves the privacy effect, but also maintains the display quality, avoiding the problem of affecting the viewing experience due to the reduction of brightness in full screen. In the sharing mode, the gray scale control algorithm adjusts the screen output to optimize the visibility from multiple angles, ensuring that the content can be clearly seen within a wide viewing angle. The present disclosure allows users to easily switch between display modes according to different use scenarios and personal preferences, such as switching to the privacy mode in public places and switching to the sharing mode when sharing information with others. Compared with the prior art of adding a physical layer (such as a light shielding film) to achieve the privacy function, the present solution achieves the same effect by software controlling the gray scale output, avoiding the increase in production complexity and cost. This method reduces the number of mask layers in production, improves production efficiency and product yield, and also reduces maintenance costs. The display mode control and efficient gray scale adjustment technology of the present solution bring significant performance improvement and user experience optimization to modern display devices.

[0052] The display unit control method of the present disclosure, other advantages, objectives and features of the present disclosure will be embodied in part through the following description, and will be understood by those skilled in the art through research and practice of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0053] The above and various other advantages and benefits of the present disclosure will become apparent to those ordinarily skilled in the art upon reading the following detailed description of the preferred embodiments in conjunction with the accompanying drawings.

[0054] FIG. 1 is a flowchart of a display unit control method according to an embodiment of the present disclosure;

[0055] FIG. 2 is a schematic diagram of a conventional gray scale control curve according to the present disclosure;

[0056] FIG. 3 is a schematic diagram of a privacy gray scale control curve according to the present disclosure;

[0057] FIG. 4 is a schematic diagram of a contrast ratio of 26000:1 according to the present disclosure;

[0058] FIG. 5 is a schematic diagram of a contrast ratio of 65:1 according to the present disclosure;

[0059] Fig. 6 is a structural schematic diagram of a display unit control device according to an embodiment of the present disclosure;

[0060] Fig. 7 is a structural schematic diagram of a display unit control electronic device according to an embodiment of the present disclosure;

[0061] Fig. 8 is a structural schematic diagram of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0062] The present application will be further described below in conjunction with the drawings and specific embodiments. The following description is merely illustrative of the basic principles of the present application and is not intended to limit the same.

[0063] Referring to Fig. 1, a flowchart of a display unit control method according to an embodiment of the present disclosure is shown, which can include the following steps:

[0064] S110, obtaining a display mode selection instruction of a target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction;

[0065] For example, the display mode selection instruction of the user is identified and obtained, which can be generated based on clicking a specific icon of the display unit, can be generated based on a gesture action of the user, or can be generated based on voice information of the user, etc.

[0066] When the user wants the content to be seen by people around him, the sharing mode selection instruction can be generated.

[0067] When the user needs privacy protection and does not want others to see the screen content, the privacy mode selection instruction can be generated.

[0068] It should be noted that the display unit can be a smart device such as a mobile phone, a tablet, a notebook computer, etc. In a public place, the user does not want his information to be viewed by others, and the display mode can be selected as the privacy mode. When the user needs to show the information to others, the display mode can be selected as the sharing mode. The method can also be applied to the display screen of the co-pilot of a vehicle. When the vehicle is stopped or does not need to be driven, the main driver and the co-pilot can enjoy the picture information on the display screen of the co-pilot through the sharing mode. When the vehicle is running, the privacy mode is selected to avoid interference with the driver of the main driver, and only the co-pilot can effectively view the information. The method of the present disclosure can also be applied to other products in the active privacy application scenario, which is not listed here.

[0069] S120, calling the corresponding display mode gray scale control algorithm based on the display mode selection instruction, wherein the display mode gray scale control curve includes a sharing mode gray scale control algorithm and a privacy protection mode gray scale control algorithm;

[0070] For example, the sharing mode gray scale control algorithm adjusts the gray scale output of the screen to optimize multi-angle visibility, ensuring that the content can be clearly seen within a wide viewing angle. The privacy protection mode gray scale control algorithm adjusts the gray scale output of the screen to limit the viewing angle, so that the content can only be seen within a narrow front viewing angle, thereby protecting user privacy.

[0071] S130, controlling the gray scale output signal of the display unit based on the gray scale input signal and the display mode gray scale control algorithm.

[0072] For example, according to the gray scale control algorithm selected in the previous step, the final gray scale value is calculated and output to the display unit in combination with the current gray scale input signal, i.e. image data. In the sharing mode, the image gray scale is adjusted to provide higher brightness and contrast, suitable for multi-angle viewing. In the privacy protection mode, the image gray scale is adjusted to reduce visibility from the side, and to enhance the clarity and contrast of the front.

[0073] In summary, the present disclosure limits the viewing angle by using a unique privacy protection mode gray scale control algorithm, so that the content is only visible within the front viewing angle, greatly improving user privacy protection. Compared with the prior art, this method not only improves the privacy protection effect, but also maintains the display quality, avoiding the problem of affecting the viewing experience due to the reduction of brightness in full screen. In the sharing mode, the gray scale control algorithm adjusts the screen output to optimize multi-angle visibility, ensuring that the content can be clearly seen within a wide viewing angle. The present disclosure allows users to easily switch between display modes according to different use scenarios and personal preferences, such as switching to the privacy protection mode in public places, and switching to the sharing mode when information needs to be shared with others. Compared with the prior art of adding a physical layer (such as a light shielding film or a black matrix light shielding layer) to achieve privacy protection, the present solution achieves the same effect by software controlling the gray scale output, avoiding the increase in production complexity and cost. This method reduces the number of mask layers in production, improves production efficiency and product yield, and also reduces maintenance costs. The present solution brings significant performance improvement and user experience optimization to modern display devices through flexible display mode control and efficient gray scale adjustment technology. The present solution can also be used in combination with the addition of a physical layer (such as a light shielding film or a black matrix light shielding layer) to improve the privacy protection effect or reduce the number of black matrix light shielding layers.

[0074] In some examples, the sharing mode gray scale control algorithm is established based on a conventional gray scale control curve;

[0075] The above-mentioned privacy mode gray scale control algorithm is based on a privacy mode gray scale control curve;

[0076] In the case that the gray scale input value of the above-mentioned privacy mode gray scale control curve is less than or equal to the first gray scale threshold value, all the gray scale output values are the first gray scale threshold value;

[0077] In the case that the gray scale input value of the above-mentioned privacy mode gray scale control curve is greater than or equal to the second gray scale threshold value, the privacy mode gray scale output value is equal to the normal gray scale output value;

[0078] In the case that the gray scale input value of the above-mentioned privacy mode gray scale control curve is greater than the first gray scale value and less than the second gray scale threshold value, the corresponding privacy mode gray scale output value is greater than the normal gray scale output value under the same gray scale input value.

[0079] For example, in the sharing mode, the gray scale control algorithm is based on the first type of gray scale control curve (for example, the normal gray scale control curve), as shown in FIG. 2, which is a normal gray scale control curve diagram proposed in the present disclosure. This curve is generally designed to optimize the overall visibility of the screen, so that the content can be clearly seen at different viewing angles. This mode is suitable for occasions where the screen content needs to be shared with people around.

[0080] The gray scale control algorithm in the privacy mode is more complex, which is based on a specially designed privacy mode gray scale control curve, aiming to protect the user's privacy while maintaining the readability of the screen content as much as possible. As shown in FIG. 3, it is a privacy mode gray scale control curve diagram proposed in the present disclosure. The privacy mode gray scale control curve is divided into three sections:

[0081] When the gray scale input value is less than or equal to the first gray scale threshold value, all the gray scale output values are set to the first gray scale threshold value. This means that at lower brightness, the screen will automatically brighten to this threshold value, in order to prevent seeing dark details from the side and increase the privacy effect.

[0082] When the gray scale input value is between the first and second gray scale threshold values, the corresponding gray scale output value in the privacy mode will be higher than the output value in the normal mode. This may be to blur the details by increasing the brightness without sacrificing too much brightness, thereby improving privacy protection.

[0083] When the gray scale input value is greater than or equal to the second gray scale threshold value, the gray scale output value in the privacy mode is equal to the normal gray scale output value. At higher brightness levels, the details are more obvious and harder to hide, and the screen display is the same as the normal mode.

[0084] The grayscale control scheme presented in this disclosure provides a method to balance privacy protection and screen usability. By adjusting the output behavior for low and high luminance, and increasing the output luminance at intermediate values, the technique aims to provide sufficient privacy protection while still ensuring that the screen content is still legible when needed. It is suitable for use in public places or other environments where it is desirable to protect personal information from being easily seen by bystanders.

[0085] In some examples, in the case that the grayscale input value of the above-mentioned privacy grayscale control curve is greater than the first grayscale threshold value and less than the second grayscale threshold value, the method for determining the privacy mode grayscale output value specifically includes:

[0086] determining the sum of the first luminance threshold value and the original luminance as the corrected luminance, wherein the first grayscale threshold value is determined based on the above-mentioned grayscale and luminance relationship;

[0087] determining the grayscale value corresponding to the above-mentioned corrected luminance based on the above-mentioned grayscale and luminance relationship;

[0088] determining the grayscale value corresponding to the above-mentioned corrected luminance as the above-mentioned privacy mode grayscale output value.

[0089] For example, the first luminance threshold value is a preset reference point used to define the lowest luminance level at which special processing begins in the privacy mode. The original luminance is the luminance value that should be displayed according to the input signal in the regular display mode. The corrected luminance is obtained by adding the first luminance threshold value and the original luminance. The luminance output when looking at the screen from the front is increased, thereby enhancing privacy protection while maintaining image readability when viewed from the side.

[0090] Determining the grayscale value corresponding to the corrected luminance based on the grayscale and luminance relationship involves converting the corrected luminance to the corresponding grayscale output value. This conversion relies on the grayscale and luminance relationship specific to the display unit, which can be calibrated before the display unit is shipped. The grayscale and luminance relationship specific to the display unit is a linear or nonlinear mapping. This relationship defines the grayscale levels that different luminance values should correspond to.

[0091] The grayscale value corresponding to the corrected luminance is set as the output grayscale value in the privacy mode. That is, a higher grayscale value is set for the grayscale input value between the first and second luminance threshold values, which can reduce the visibility of details when viewing the screen from the side, thereby improving privacy.

[0092] The method provided by the present disclosure can make the user see a brighter and clearer image when facing the screen by increasing the corrected brightness, which helps to maintain a good user experience. At a wider viewing angle, the image details become indistinguishable due to the increase in gray scale output, effectively preventing sensitive information leakage. This method is suitable for various occasions requiring high privacy protection, such as ATMs, mobile devices, and display devices in the medical and security fields used in public places. Through this technology, the visibility and privacy protection of the image can be effectively balanced to adapt to changing use environments and user needs.

[0093] In some examples, further comprising:

[0094] Obtaining current ambient light intensity information of the display unit;

[0095] Determining a first screen white-state brightness, a first reflected ambient light brightness, and a first contrast requirement threshold of a first viewing position corresponding to the current ambient light intensity information, wherein the first viewing position is a position corresponding to the display information of the display unit that can be effectively obtained in both the sharing mode and the privacy mode;

[0096] Calculating a first reference brightness based on the first screen white-state brightness, the first reflected ambient light brightness, and the first contrast requirement threshold;

[0097] Determining a second screen white-state brightness, a second reflected ambient light brightness, and a second contrast requirement threshold of a second viewing position corresponding to the current ambient light intensity information, wherein the second viewing position is a position corresponding to the display information of the display unit that can be effectively obtained only in the sharing mode;

[0098] Calculating a second reference brightness based on the second screen white-state brightness, the second reflected ambient light brightness, and the second contrast requirement threshold;

[0099] Determining a brightness attenuation coefficient of the first viewing position and the second viewing position based on the angle attenuation curve of the display product;

[0100] Determining the maximum value of the first candidate brightness that satisfies the condition that the first candidate brightness is less than or equal to the first reference brightness and the second candidate brightness is greater than or equal to the second reference brightness, wherein the ratio of the first candidate brightness to the second candidate brightness is the brightness attenuation coefficient;

[0101] Taking the maximum value of the first candidate brightness as the first brightness threshold.

[0102] Exemplarily, the current ambient light intensity information is acquired, and different current ambient light intensities correspond to different first screen white-state brightness, first reflected ambient light brightness, second screen white-state brightness and second reflected ambient light brightness. The correspondence between the brightness parameters and the current ambient light intensity information can be acquired by a calibration test of the display unit before leaving the factory.

[0103] The first screen white-state brightness is a brightness value of the brightest part of the screen required to be reached at the first viewing position (usually a front position facing the screen). The first reflected ambient light brightness is the brightness of the light reflected from the environment to the screen. The first contrast requirement threshold is a minimum standard of contrast ratio set to ensure that the content can be clearly seen when viewing the screen from this position.

[0104] The second screen white-state brightness is a brightness value of the brightest part of the screen required to be reached at the second viewing position (which can be a side position or other non-front position). The second reflected ambient light brightness is the brightness of the light reflected from the environment to the screen at this position. The second contrast requirement threshold is a contrast ratio standard to ensure the visibility of the content when viewing the screen from this position.

[0105] According to the parameters at the first position and the second position, reference brightness values of each viewing position are calculated, which will be used to adjust the display settings of the screen to adapt to different viewing requirements. According to the angle attenuation curve of the display product, a brightness attenuation coefficient from the first position to the second position is determined, which can reflect the change of screen brightness when viewed at different angles.

[0106] A condition is determined to make the first candidate brightness maximum and meet the first candidate brightness less than or equal to the first reference brightness and the second candidate brightness greater than or equal to the second reference brightness.

[0107] The maximum value of the calculated first candidate brightness is taken as the first brightness threshold, which is used to adjust the brightness output of the screen when viewed from the front.

[0108] In some examples, the first contrast requirement threshold is greater than or equal to 13, the second contrast requirement threshold is less than or equal to 13, and the ratio of the first contrast requirement threshold to the second contrast requirement threshold is greater than or equal to 3.

[0109] Exemplarily, the display product is usually used under certain ambient light, such as using a notebook computer for office work during the day, using a car screen for navigation, etc. The common ambient light intensity and the contrast ratio under different ambient light of European car customers are shown in Table 1:

[0110] Table 1

[0111] For example: the contrast ratio required for outdoor clear screen content recognition is ACR(Ambient contrast ratio, ambient light contrast) >= 13:1, so according to the above requirements, the minimum requirement of the vehicle-mounted product is shown in Table 1, preferably the first contrast requirement threshold ACR is greater than or equal to 13:1, the second contrast requirement threshold ACR θ is less than or equal to 13:1, and ACR θ is less than or equal to 1 / 3 ACR.

[0112] In some examples, further comprising:

[0113] In the case where the first selected brightness is less than or equal to the first reference brightness or the second selected brightness is greater than or equal to the second reference brightness cannot be met, the second contrast requirement threshold is reduced.

[0114] For example, the first selected brightness is the brightness setting for front viewing (main viewing angle) and should be less than or equal to the first reference brightness. The first reference brightness is the optimal brightness value determined based on the current ambient light intensity and screen white state brightness and other factors.

[0115] The second selected brightness is the brightness setting for side viewing and should be greater than or equal to the second reference brightness. The second reference brightness is to ensure that the screen content is not easily recognized when viewed from the side, thereby protecting user privacy.

[0116] In practical applications, there may be cases where the first selected brightness and the second selected brightness cannot be met simultaneously. The second contrast requirement threshold can be reduced, i.e. the minimum contrast standard of the screen when viewed from the side is increased, making it more difficult to clearly see the screen content from the side, thereby enhancing privacy protection.

[0117] Through this strategy, the display effect and privacy protection requirements can be balanced under different viewing angles and ambient light conditions. Reducing the second contrast threshold allows the system to be more flexible in responding to environmental changes and user needs, ensuring optimal display effect and security under all conditions.

[0118] In some examples, the first reference brightness is calculated based on the first screen white state brightness, the first reflected ambient light brightness, and the first contrast requirement threshold, comprising:

[0119] Calculating the first sum of the first screen white state brightness and the first reflected ambient light brightness;

[0120] Calculating the first ratio of the first sum and the first contrast requirement threshold;

[0121] The difference between the first ratio and the first reflected ambient light brightness is taken as the first reference brightness.

[0122] For example, the first reference brightness = (the first screen white state brightness + the first reflected ambient light brightness) / the first contrast requirement threshold - the first reflected ambient light brightness.

[0123] In some examples, the second reference brightness is calculated based on the second screen white state brightness, the second reflected ambient light brightness, and the second contrast requirement threshold, including:

[0124] Calculating a second sum value of the second screen white state brightness and the second reflected ambient light brightness;

[0125] Calculating a second ratio value of the second sum value and the second contrast requirement threshold;

[0126] Taking a difference value between the second ratio value and the second reflected ambient light brightness as the second reference brightness.

[0127] For example, the second reference brightness = (the second screen white state brightness + the second reflected ambient light brightness) / the second contrast requirement threshold - the second reflected ambient light brightness.

[0128] In some examples, the second gray scale threshold is determined based on the second brightness threshold,

[0129] The method further includes:

[0130] Calculating a threshold sum value of the candidate second brightness threshold and the first brightness threshold;

[0131] Determining a maximum value of the candidate second brightness threshold under the condition that the threshold sum value is greater than a high first order brightness and less than a high second order brightness, and the candidate second brightness threshold is less than or equal to a preset multiple of the high first order brightness, wherein the candidate second brightness threshold is an Nth order corresponding brightness, the high first order brightness is an (N+1)th order corresponding brightness, and the high second order is an (N+2)th order corresponding brightness;

[0132] Determining the maximum value of the candidate second brightness threshold as the second brightness threshold.

[0133] For example, the second brightness threshold L Gy may be calculated by the following formula:

[0134] L Gy+1 <L Gy +L Gx <L Gy+2 ;

[0135] L Gy ≤1.02*L Gy+1

[0136] wherein L Gx is the first brightness threshold, and LGy+1 L is high first order brightness Gy+2 L is high second order brightness, 1.02 is a preset multiple.

[0137] In some examples, the first gray scale threshold and the second gray scale threshold can be calculated in the following manner:

[0138] S210, set the first contrast requirement threshold A and the second contrast requirement threshold B, the values of A and B can be set to 13.

[0139] S220, calculate the first candidate brightness L Gx :

[0140] The first candidate brightness L Gx ≤(the first screen white state brightness L W + the first reflected ambient light brightness L R ) / the first contrast requirement threshold A-the first reflected ambient light brightness L R ; (1)

[0141] The second candidate brightness L Gxθ ≥(the first screen white state brightness L Wθ + the first reflected ambient light brightness L Rθ ) / the second contrast requirement threshold B-the first reflected ambient light brightness L Rθ ; (2)

[0142] L Gx =L Gxθ *β; (3)

[0143] Wherein the value of β can be determined by the display product angle decay (L-decay) curve, that is, the brightness decay coefficient of the second viewing position relative to the first viewing position.

[0144] S220, the maximum value of the first candidate brightness L Gx is taken as the first brightness threshold L Gx , and the first brightness threshold L Gx corresponding to the first gray scale threshold G X：

[0145]

[0146] In the formula, r is the gamma correction coefficient, and Lw is the first screen white state brightness.

[0147] S230, calculate the second gray scale threshold Gy based on the following formula to satisfy the following condition formula:

[0148]

[0149] Condition formula: L Gy+1 <L Gy +L Gx <L Gy+2 ;

[0150] L Gy ≤1.02*L Gy+1

[0151] Take the co-pilot's on-board screen as an example, assuming that the brightness of the on-board display screen is 500 / 100 / 5 nits when the ambient light is 1000 / 250 / 10 lx, the reflectivity of the display module is 1.2%, the angle of the driver's view is θ = 45°, and α = β = 0.1. The measured first reflected ambient light brightness L R and the second reflected ambient light brightness L Rθ As shown in Table 2, the first ambient light contrast ACR and the second ambient light contrast ACRθ calculated when using the shared mode gray scale control algorithm are as shown in Table 2:

[0152] Table 2

[0153] As can be seen from Table 2, the ACR of the co-pilot is about 130:1, and the ACR of the driver is 14:1>13:1, so the driver can still better identify the content of the screen, and the privacy effect is not good.

[0154] The first selected brightness L Gx and the second selected brightness L Gxθ are iteratively calculated by formulas (1) and (2), and the results are shown in Tables 3 and 4:

[0155] Table 3

[0156] Table 4

[0157] As can be seen from Tables 3 and 4, for an ambient light intensity of 1000 lx, when L Gxθ is 0.098 nit, the ACR of the driver decreases from 14.49 without algorithm to 14.121, which does not satisfy <13:1, and the darkroom contrast decreases from 500000:1 to 510:1, and the privacy effect is better than without algorithm. When L Gxθ is 0.45 nit, the ACR of the driver decreases from 14.121 without algorithm to 12.925, which satisfies <13:1, and the darkroom contrast decreases from 500000:1 to 111:1, and the privacy effect is further enhanced.

[0158] For an ambient light intensity of 250 lx, when LGxθ When the ACR of the main driver is 0.098 nit, the ACR is reduced from 14.23 without algorithm to 10.851, the <13:1 is met, the darkroom contrast is reduced from 120000:1 to 102:1, and the privacy effect is good.

[0159] For ambient light illumination of 10lx, when L Gxθ When the ACR of the main driver is 0.098 nit, the ACR is reduced from 14.6 without algorithm to 3.985, the <13:1 is met, the darkroom contrast is reduced from 5000:1 to 5.1:1, and the privacy effect is good.

[0160] In some examples, when driving during the day, due to the environmental light sensor of the vehicle screen, the change of the environmental light will cause the change of the screen brightness, and when the environmental light becomes dark, the screen brightness will also become dark. This embodiment takes the case of 500nits of front view angle brightness:

[0161] Suppose the first brightness threshold corresponding to the first gray scale threshold is 0.1 nit, and the threshold brightness corresponds to 6 gray scales, then all gray scales below 6 are set to threshold brightness Lx (the threshold brightness value here is 0.1 nit, which is lower than the black state brightness of LCD 0.5 nit, and has better contrast than LCD at the front view angle). Suppose the second brightness threshold corresponding to the second gray scale threshold is 5 nit, and the threshold brightness corresponds to 32 gray scales, then all gray scales from 6 to 31 are set to normal gray scale brightness + threshold brightness Lx. The gray scale above 32 is set to normal gray scale brightness, and the privacy mode gray scale obtained is shown in Table 5:

[0162] Table 5

[0163] Table 6

[0164] At this time, the white state brightness of the conventional OLED privacy solution at 45° is 13 nit, and the contrast is 26000:1 as shown in FIG. 4; after applying the privacy enhancement algorithm, the white state brightness at 45° is still 6.5 nit, the black state is 0.1 nit, and the contrast is 65:1 as shown in FIG. 5. The contrast of the privacy method proposed by the present disclosure is comparable to that of LCD1 and LCD2, and the contrast is reduced by 13000 / 65=200 times, and the privacy effect is enhanced.

[0165] Referring to FIG. 6, a display unit control device structure provided by an embodiment of the present disclosure can include:

[0166] The acquisition unit 21 is configured to acquire a display mode selection instruction of a target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction.

[0167] The calling unit 22 is configured to call the corresponding display mode gray scale control algorithm based on the display mode selection instruction, wherein the display mode gray scale control curve includes the shared mode gray scale control algorithm and the privacy mode gray scale control algorithm.

[0168] The control unit 23 is configured to control the gray scale output signal of the display unit based on the gray scale input signal and the display mode gray scale control algorithm.

[0169] As shown in FIG. 7, the embodiment of the present disclosure further provides an electronic device 300, which includes a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any method for controlling the display unit are implemented.

[0170] As shown in FIG. 8, the embodiment of the present disclosure further provides a display device 30, which includes an electronic device 300. The electronic device includes a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor. When the processor 320 executes the computer program 311, the steps of any method for controlling the display unit are implemented.

[0171] Since the electronic device introduced in the embodiment is the device used to implement the display unit control device in the embodiment of the present disclosure, the specific implementation of the electronic device in the embodiment and its various forms can be understood by those skilled in the art based on the method introduced in the embodiment of the present disclosure. Therefore, how the electronic device implements the method in the embodiment of the present disclosure is not described in detail here. As long as the device used by those skilled in the art to implement the method in the embodiment of the present disclosure belongs to the scope of the present disclosure.

[0172] In the implementation process, the computer program 311 can implement any embodiment in the first aspect when executed by the processor.

[0173] The above describes certain embodiments of the present disclosure, which, together with other embodiments, are covered in the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be executed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily follow the specific order or continuous order shown to achieve the desired results. In some embodiments, multi-task processing and parallel processing are also possible or advantageous.

[0174] It is also to be noted that the terms "comprising", "including", and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0175] It is to be understood that the above-described embodiments are merely illustrative of only a few of the applications of the present application and that many modifications, changes, and variations can be made by those skilled in the art without departing from the spirit and scope of the present application. The scope of the present application is defined by the appended claims, and any modifications, changes, and variations that come within the scope of the claims and their equivalents are to be embraced within the scope of the present application.

Claims

1. A display unit control method, comprising: Obtain the display mode selection instruction of the target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction; The corresponding display mode grayscale control algorithm is invoked based on the display mode selection instruction, wherein the display mode grayscale control curve includes a shared mode grayscale control algorithm and a privacy mode grayscale control algorithm. The grayscale output signal of the display unit is controlled based on the grayscale input signal and the grayscale control algorithm of the display mode.

2. The display unit control method according to claim 1, wherein, The shared mode grayscale control algorithm is based on conventional grayscale control curves; The anti-spy mode grayscale control algorithm is established based on the anti-spy grayscale control curve; When the grayscale input value of the anti-peeping grayscale control curve is less than or equal to the first grayscale threshold, all grayscale output values ​​are the first grayscale threshold. When the grayscale input value of the anti-spy grayscale control curve is greater than or equal to the second grayscale threshold, the grayscale output value of the anti-spy mode is equal to the normal grayscale output value. When the grayscale input value of the anti-spy grayscale control curve is greater than the first grayscale value and less than the second grayscale threshold, the corresponding anti-spy mode grayscale output value is greater than the normal grayscale output value under the same grayscale input value.

3. The display unit control method according to claim 2, wherein, When the grayscale input value of the privacy grayscale control curve is greater than the first grayscale threshold and less than the second grayscale threshold, the method for determining the grayscale output value of the privacy mode specifically includes: The sum of the first brightness threshold and the original brightness is determined as the corrected brightness, wherein the first grayscale threshold is determined based on the first brightness threshold and the relationship between grayscale and brightness; The grayscale value corresponding to the corrected brightness is determined based on the relationship between grayscale and brightness. The grayscale value corresponding to the corrected brightness is determined as the grayscale output value of the privacy mode.

4. The display unit control method according to claim 3 further includes: Obtain the current ambient light intensity information of the display unit; The first screen white state brightness, first reflected ambient light brightness, and first contrast requirement threshold are determined for the first viewing position corresponding to the current ambient light intensity information, wherein the first viewing position is the position where the display information of the display unit can be effectively obtained in both shared mode and privacy mode; The first reference brightness is calculated based on the first screen white state brightness, the first reflected ambient light brightness, and the first contrast requirement threshold. Determine the second screen white state brightness, second reflected ambient light brightness, and second contrast requirement threshold for the second viewing position corresponding to the current ambient light intensity information, wherein the second viewing position is the position corresponding to the display information of the display unit that can be effectively obtained only in the shared mode; The second reference brightness is calculated based on the second screen white state brightness, the second reflected ambient light brightness, and the second contrast requirement threshold. The brightness attenuation coefficients of the first viewing position and the second viewing position are determined based on the angle attenuation curve of the display product; Determine the maximum value of the first candidate brightness under the condition that the first candidate brightness is less than or equal to the first reference brightness and the second candidate brightness is greater than or equal to the second reference brightness, wherein the ratio of the first candidate brightness to the second candidate brightness is the brightness attenuation coefficient. The maximum value of the first candidate brightness is used as the first brightness threshold.

5. The display unit control method according to claim 4, wherein, The first contrast requirement threshold is greater than or equal to 13, the second contrast requirement threshold is less than or equal to 13, and the ratio of the first contrast requirement threshold to the second contrast requirement threshold is greater than or equal to 3.

6. The display unit control method according to claim 4, further comprising: If the first candidate brightness is less than or equal to the first reference brightness or the second candidate brightness is greater than or equal to the second reference brightness, the second contrast requirement threshold shall be reduced.

7. The display unit control method according to claim 4, wherein, The calculation of the first reference brightness based on the first screen white state brightness, the first reflected ambient light brightness, and the first contrast requirement threshold includes: Calculate the first sum of the white state brightness of the first screen and the first reflected ambient light brightness; Calculate the first ratio between the first sum and the first contrast requirement threshold; The difference between the first ratio and the first reflected ambient light brightness is used as the first reference brightness.

8. The display unit control method according to claim 4, wherein, The calculation of the second reference brightness based on the second screen white state brightness, the second reflected ambient light brightness, and the second contrast requirement threshold includes: Calculate the second sum of the second screen white state brightness and the second reflected ambient light brightness; Calculate the second ratio between the second sum and the second contrast requirement threshold; The difference between the second ratio and the second reflected ambient light brightness is used as the second reference brightness.

9. The display unit control method according to claim 4, wherein the second grayscale threshold is determined based on a second brightness threshold. The method further includes: Calculate the threshold sum of the candidate second brightness threshold and the first brightness threshold; The maximum value of the candidate second brightness threshold is determined when the threshold and value are greater than the higher-order brightness and less than the higher-order brightness, and the candidate second brightness threshold is less than or equal to a preset multiple of the higher-order brightness. The candidate second brightness threshold is the brightness corresponding to the Nth order, the higher-order brightness is the brightness corresponding to the N+1th order, and the higher-order brightness is the brightness corresponding to the N+2th order. The maximum value of the candidate second brightness threshold is determined as the second brightness threshold.

10. A display unit control device, comprising: The acquisition unit is used to acquire the display mode selection instruction of the target user, wherein the display mode selection instruction includes a sharing mode selection instruction and a privacy mode selection instruction; The calling unit is used to call the corresponding display mode grayscale control algorithm based on the display mode selection instruction, wherein the display mode grayscale control curve includes a shared mode grayscale control algorithm and a privacy mode grayscale control algorithm; The control unit is used to control the grayscale output signal of the display unit based on the grayscale input signal and the grayscale control algorithm of the display mode.

11. An electronic device, comprising: A memory and a processor, the processor being configured to implement the steps of the display unit control method as described in any one of claims 1-9 when executing a computer program stored in the memory.

12. A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the display unit control method as described in any one of claims 1-9.

13. A display device comprising the electronic device of claim 11.

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