A display parameter adjustment method, device and display device

Abstract

The present invention provides a display parameter adjustment method, device and display device, which relate to the field of display technology. The method includes: detecting the ambient brightness; determining the adjustment parameters of the display device corresponding to the preset conditions; the preset conditions include that the difference between the middle grayscale brightness of the display device and the ambient brightness is less than or equal to the preset brightness value; and adjusting the brightness of at least part of the grayscale according to the adjustment parameters. In an embodiment of the present invention, when the middle grayscale brightness of the display image is consistent with the physiological balance point of human eye adaptation, the perception of the image is more comfortable and natural. Therefore, the natural optical environment where the display device is located can be used as the adjustment standard, and the corresponding display parameters can be adjusted with an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images without harm to the human eye and feeling comfortable.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display parameter adjustment method, device and display device. Background Art

[0002] Nowadays, people are paying more and more attention to the damage that display devices bring to human eyes. Therefore, many display devices adopt methods such as lowering color temperature and configuring eye protection mode to reduce the main light component that is more harmful to human eyes, that is, blue light, thereby reducing the damage of display devices to human eyes.

[0003] However, among the blue light emitted by the display device, the blue light that actually causes damage to the retina is the blue light that passes through the pupil and reaches the retina at the fundus. Therefore, simply reducing the amount of blue light emitted cannot guarantee that the amount of blue light radiation reaching the fundus can be reduced. For example, in a darker environment, the pupil of the human eye expands, and the amount of light entering is proportional to the square of the pupil diameter. For the same picture, the amount of blue light radiation reaching the fundus is much higher than the amount of blue light radiation in an office environment where the pupil diameter is smaller, and the damage to the human eye is much greater. Therefore, the current method of only reducing the relative blue light emission of the display device cannot guarantee the total amount of blue light radiation that passes through the pupil and reaches the retina at the fundus because it does not limit the maximum brightness, and thus cannot effectively reduce the damage of blue light to the human eye. Summary of the invention

[0004] The present invention provides a display parameter adjustment method, device and display device to solve the problem that the current method of reducing the relative blue light emission of the display device cannot effectively reduce the blue light radiation reaching the fundus retina through the pupil, and thus cannot effectively reduce the damage of blue light to the human eye.

[0005] In order to solve the above problem, the present invention discloses a display parameter adjustment method, comprising:

[0006] Detect ambient brightness;

[0007] Determining an adjustment parameter of a display device corresponding to a preset condition; the preset condition includes that a difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value;

[0008] The brightness of at least part of the grayscale of the display device is adjusted according to the adjustment parameter.

[0009] Optionally, the determining of the adjustment parameter of the display device corresponding to the preset condition includes:

[0010] Determining the maximum grayscale brightness of the display device corresponding to the preset condition;

[0011] According to a first corresponding relationship between a preset grayscale brightness and a backlight driving parameter, a first backlight driving parameter corresponding to the maximum grayscale brightness is determined, and the first backlight driving parameter is used as the adjustment parameter.

[0012] Optionally, adjusting the brightness of at least part of the grayscale of the display device according to the adjustment parameter includes:

[0013] The backlight module of the display device is driven according to the first backlight driving parameter so that the difference between the brightness of the intermediate gray scale and the ambient brightness is less than a preset brightness value.

[0014] Optionally, the determining of the adjustment parameter of the display device corresponding to the preset condition includes:

[0015] Determine the ratio of the ambient brightness to the brightness before the intermediate grayscale adjustment to obtain an adjustment parameter of the display device;

[0016] Determine the product of the first brightness of the target grayscale before adjustment and the adjustment parameter to obtain the second brightness of the target grayscale; the target grayscale is any grayscale of the display device, or any grayscale to be displayed;

[0017] According to a second corresponding relationship between a preset grayscale and the brightness before adjustment, an original grayscale corresponding to the second brightness is determined, and the original grayscale is used as the adjustment parameter.

[0018] Optionally, adjusting the brightness of at least part of the grayscale of the display device according to the adjustment parameter includes:

[0019] When the display condition of the target gray scale is met, the display is performed according to the brightness of the original gray scale.

[0020] Optionally, the preset brightness value is greater than or equal to 0.2 times the ambient brightness and less than or equal to 1.6 times the ambient brightness.

[0021] Optionally, the method further comprises:

[0022] The color temperature of the display device is adjusted according to the preset sunlight color temperature.

[0023] Optionally, adjusting the color temperature of the display device according to a preset sunlight color temperature includes:

[0024] The RGB gain parameters of the display device are adjusted to preset RGB gain parameters corresponding to a preset sunlight color temperature.

[0025] Optionally, the preset sunlight color temperature is greater than or equal to 6000K and less than or equal to 7200K.

[0026] In order to solve the above problem, the present invention further discloses a display parameter adjustment device, comprising:

[0027] A detection module, used to detect ambient brightness;

[0028] A determination module, used to determine an adjustment parameter of the display device corresponding to a preset condition; the preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value;

[0029] The first adjustment module is used to adjust the brightness of at least part of the grayscale of the display device according to the adjustment parameter.

[0030] In order to solve the above problem, the present invention further discloses a display device, wherein the display device uses the above display parameter adjustment method to adjust display parameters.

[0031] Optionally, the display device includes a backlight module, and the ratio of the sum of the powers of a first light source band to the sum of the powers of a second light source band of the backlight module is less than 50%; the first light source band is [415,455] nanometers, and the second light source band is [400,500] nanometers.

[0032] Compared with the prior art, the present invention has the following advantages:

[0033] In an embodiment of the present invention, the ambient brightness can be detected first, and then the adjustment parameters of the display device corresponding to the preset conditions are determined, wherein the preset conditions include that the difference between the brightness of the middle grayscale of the display device and the ambient brightness is less than or equal to the preset brightness value, and then the brightness of at least part of the grayscale of the display device can be adjusted according to the adjustment parameters. In an embodiment of the present invention, when the brightness of the middle grayscale of the display image is consistent with the physiological balance point of the human eye under the same environment, the perception of the image is more comfortable and natural. Therefore, the natural optical environment in which the display device is located can be used as the adjustment standard, and the corresponding display parameters can be adjusted with an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images that are harmless to the human eye and feel comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a display parameter adjustment method according to the first embodiment of the present invention is shown;

[0035] Figure 2 A flow chart showing another display parameter adjustment method according to the first embodiment of the present invention;

[0036] Figure 3 A structural block diagram of a display parameter adjustment device according to a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Embodiment 1

[0039] Reference Figure 1 , shows a flow chart of a method for adjusting display parameters according to a first embodiment of the present invention, the method comprising the following steps:

[0040] Step 101: Detect the ambient brightness.

[0041] In an embodiment of the present invention, the display device may be equipped with an environment brightness detection module, such as a brightness sensor, so that the display device can detect the environment brightness of the display environment through the brightness sensor. In practical applications, the environment brightness detection module may include a standard white board for reflecting a large amount of environment light to the brightness sensor. Since white absorbs very little light, the accuracy of the environment brightness detection may be improved by detecting the brightness of the environment light reflected by the standard white board.

[0042] The purpose of detecting the ambient brightness is to obtain the parameters of natural light of the same brightness, because the human eye will automatically adjust the pupil size according to the ambient brightness so that the luminous flux entering the eye is within the range that is harmless to the human eye. Therefore, the brightness of natural light of the same brightness and its wavelength components, especially the blue light component, can be used as the best standard for display. If the average brightness of the display and the damage index of the blue light component are close to those of natural light of the same brightness, the luminous flux entering the eye is harmless to the human eye and feels comfortable.

[0043] Step 102: Determine an adjustment parameter of the display device corresponding to a preset condition; the preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value.

[0044] In the embodiment of the present invention, the preset condition may indicate that the brightness of the middle gray scale of the display device approaches the ambient brightness. The display device may determine what the corresponding adjustment parameter of the display device should be if the brightness of the middle gray scale approaches the ambient brightness. If the brightness of the gray scale is adjusted according to the adjustment parameter, the brightness of the middle gray scale can be made close to the ambient brightness.

[0045] Optionally, the preset brightness value may be greater than or equal to 0.2 times the ambient brightness, and less than or equal to 1.6 times the ambient brightness. In practical applications, the preset brightness value may also be adjusted according to different display screens, that is, different display requirements, and the embodiments of the present invention do not specifically limit this. For example, for screens of Chinese paintings and other paintings, the preset brightness value may be greater than or equal to 0.2 times the ambient brightness, and less than or equal to 0.4 times the ambient brightness. For screens such as videos and photographs, the preset brightness value may be greater than or equal to 0.8 times the ambient brightness, and less than or equal to 1.6 times the ambient brightness.

[0046] Since the middle grayscale image represents the middle point of the brightness perceived by the human eye, and is also the physiological balance point after the human eye adapts to the average brightness of the current environment, when the middle grayscale brightness of the displayed image is consistent with the physiological balance point of the human eye in this environment, the perception of the image is more comfortable and natural. Therefore, the grayscale brightness can be adjusted to make the middle grayscale brightness close to the ambient brightness, so that the human eye can perceive the image more comfortably. In this way, the human eye pupil is not easily stimulated to dilate, and the amount of blue light radiation reaching the retina through the pupil can be reduced, thereby reducing the damage of blue light to the human eye.

[0047] Specifically, this step can be implemented in the following two ways:

[0048] The first implementation method includes the following steps:

[0049] Determine the maximum grayscale brightness of the display device corresponding to the preset condition; determine the first backlight driving parameter corresponding to the maximum grayscale brightness according to the first corresponding relationship between the preset grayscale brightness and the backlight driving parameter, and use the first backlight driving parameter as the adjustment parameter.

[0050] The first implementation method is the hardware-based adjustment method. Since the grayscale can represent the brightness level of the display device, the backlight brightness of the display device can determine the brightness of the maximum grayscale, that is, the maximum brightness of the display. If the brightness of the maximum grayscale is determined, then according to the number of grayscales of the display device, the brightness of other grayscales can also be determined accordingly. Therefore, if the preset condition that the brightness of the middle grayscale approaches the ambient brightness is to be met, it can be first determined that if the brightness of the middle grayscale approaches the ambient brightness, the corresponding brightness of the maximum grayscale of the display device should be what it is, and then it can be determined what the first backlight driving parameter corresponding to the maximum grayscale brightness corresponding to the preset condition should be. If the backlight module of the display device is then driven according to the first backlight driving parameter, the maximum grayscale brightness can be equal to the brightness that should be achieved, thereby indirectly making the brightness of the middle grayscale approach the ambient brightness, and other grayscales are also adjusted accordingly in the same proportion.

[0051] Among them, the first correspondence between different grayscale brightness and backlight driving parameters can be pre-stored. When the maximum grayscale brightness needs to reach a certain brightness, the backlight driving parameters that make the maximum grayscale brightness reach the brightness can be determined by looking up a table. According to the brightness electrical parameters (usually voltage or current) detected by the ambient brightness detection module, after A / D (analog signal / digital signal) conversion, it can be converted into a brightness parameter in the form of a digital signal. Correspondingly, the grayscale brightness in the first correspondence can be represented by a brightness parameter in the form of a digital signal. Then, according to the first correspondence, the backlight brightness of the display device can be adjusted so that the brightness of the middle grayscale is consistent with the detected ambient brightness. By adjusting the backlight brightness, the brightness adjustment of all grayscales of the display device can be achieved.

[0052] Among them, when the driving mechanism of the backlight module is different, the backlight driving parameters will also be different. For example, for a voltage-driven backlight module, different backlight brightness can be achieved by adjusting the duty cycle of PWM (Pulse Width Modulation), that is, the backlight driving parameter can be the duty cycle of the backlight driving signal. For a current-driven backlight module, different backlight brightness can be achieved by adjusting the size of the backlight driving current, that is, the backlight driving parameter can be the backlight driving current. For other types of display devices, different measures can also be adopted according to their different light-emitting mechanisms.

[0053] The second implementation method includes the following steps:

[0054] Determine the ratio of the ambient brightness to the brightness before the intermediate grayscale is adjusted to obtain an adjustment parameter of the display device; determine the product of the first brightness before the target grayscale is adjusted and the adjustment parameter to obtain a second brightness of the target grayscale; the target grayscale is any grayscale of the display device, or any grayscale to be displayed; according to a second corresponding relationship between the preset grayscale and the brightness before adjustment, determine the original grayscale corresponding to the second brightness, and use the original grayscale as the adjustment parameter.

[0055] The second implementation method is the software-based adjustment method, that is, raising or lowering the grayscale value of the grayscale to be displayed. Specifically, it is to determine which grayscale before adjustment the brightness of each target grayscale after adjustment corresponds to, and then when the target grayscale needs to be displayed, it can be displayed according to the brightness of the corresponding grayscale before adjustment. For example, the brightness x of the target grayscale L134 after adjustment corresponds to the grayscale L150 before adjustment, that is, the brightness originally corresponding to the grayscale L150 is x, then when the target grayscale L134 needs to be displayed, it can be displayed according to the brightness x of the grayscale L150, that is, the brightness of the target grayscale L134 is x. Among them, the ratio of the ambient brightness to the brightness before adjustment of the middle grayscale is the adjustment ratio of the brightness of the middle grayscale to the ambient brightness. Correspondingly, the second brightness that the target grayscale should reach after adjustment is the product of the first brightness before adjustment of the target grayscale and the adjustment ratio, so that the brightness of the target grayscale can be adjusted in the same proportion as the brightness of the middle grayscale.

[0056] The target grayscale can be any grayscale of the display device, that is, it is possible to determine the brightness of all grayscales of the display device after adjustment, that is, the second brightness, and then determine the grayscale value of the original grayscale corresponding to the second brightness of all grayscales. That is, all grayscales can be calculated in advance, and then when displaying, the calculated brightness of the original grayscale can be used for display, so that when the ambient brightness remains unchanged for a long time, the calculation time can be saved and the display efficiency can be improved.

[0057] Of course, the target grayscale can also be any grayscale to be displayed, that is, the display device needs to display a grayscale, and calculate in real time the original grayscale corresponding to the second brightness of the grayscale. Because the ambient brightness may change rapidly, the ratio of the ambient brightness to the brightness before the intermediate grayscale adjustment is also constantly changing. Therefore, the grayscale to be displayed can be calculated in real time, thereby improving the display efficiency.

[0058] For example, when the maximum grayscale of a display device (such as a television) is 255, the brightness of the maximum grayscale Lmax and the brightness of the intermediate grayscale 127 satisfy the relationship: Lmax = L127*(2 γ ), where the value of γ is related to the environment. For example, in a living room environment, the γ value can usually be 2.2. When the ambient brightness is 50nit (nit), the middle grayscale brightness L127 can be equal to the ambient brightness of 50nit, then Lmax is about 230nit, and the current maximum brightness of a general TV is around 350nit~450nit. Through this adjustment method, the blue light radiation can be reduced by 1 / 3~1 / 2.

[0059] In addition, in the above two methods, since the brightness of each target grayscale is adjusted in the same proportion, the contrast of the display device is not affected.

[0060] Step 103: Adjust the brightness of at least part of the grayscale of the display device according to the adjustment parameter.

[0061] In the embodiment of the present invention, corresponding to the two implementations in step 102, this step also has two implementations.

[0062] Corresponding to the first implementation of step 102, step 103 can be implemented by the following steps:

[0063] The backlight module of the display device is driven according to the first backlight driving parameter so that the difference between the brightness of the middle gray scale and the ambient brightness is less than a preset brightness value.

[0064] Among them, since the first backlight driving parameter is the backlight driving parameter corresponding to the brightness of the maximum grayscale when the brightness of the middle grayscale is close to the ambient brightness, therefore, driving the backlight module of the display device according to the first backlight driving parameter can make the maximum grayscale brightness equal to the brightness that should be achieved when the preset condition is met, thereby indirectly making the brightness of the middle grayscale close to the preset condition of the ambient brightness, and other grayscales are also adjusted accordingly in the same proportion.

[0065] Corresponding to the second implementation of step 102, step 103 can be implemented by the following steps:

[0066] When the display conditions of the target grayscale are met, the display is performed according to the brightness of the original grayscale.

[0067] Before displaying a picture, the display device can first prepare all the display data of the picture, which can include the grayscale corresponding to each pixel in the picture. If the display data of the picture to be displayed includes the target grayscale, it means that the display condition of the target grayscale is met, and then the display device can display according to the brightness of the original grayscale corresponding to the second brightness of the target grayscale. If the target grayscale is an intermediate grayscale, the brightness of the intermediate grayscale is close to the ambient brightness when displayed.

[0068] It should be noted that in actual applications, it can be decided whether to adjust the grayscale brightness before the display device leaves the factory, or to adjust it in real time according to the ambient brightness after leaving the factory, according to the purpose of the display device. If the display environment is fixed, that is, the ambient brightness is fixed, the brightness of each grayscale can be adjusted and fixed according to the fixed ambient brightness before leaving the factory. If the ambient brightness of the display environment is not fixed, the grayscale brightness can be automatically adjusted during the display process according to the detection data of the ambient brightness detection module, and the embodiment of the present invention does not specifically limit this.

[0069] Optionally, in a specific application, three levels of display targets may be included:

[0070] 1. Prohibited level: According to the requirements of IEC TR 62471 standard, the blue light exposure value L of the display device B shall comply with the following standards:

[0071] L B <1 W / m2

[0072] The blue light exposure value can characterize the degree of radiation damage of the blue light of the display device to the human eye. Therefore, when adjusting the display brightness, the blue light exposure value of the display device can be controlled to always meet the above standards, thus avoiding the damage of blue light to the human eye.

[0073] Among them, the blue light exposure value of the display device can be weighted through the following formula after prior radiation brightness spectrum scanning and stored in the display device.

[0074]

[0075] Among them, L B is the blue light exposure value, 300 and 700 are the band boundary values of the spectrum scanning, that is, the spectrum scanning is carried out on the band of [300, 700] nm, L λ is the radiation brightness of the light with wavelength λ, B(λ) is the preset coefficient of the light with wavelength λ, and △λ is the scanning interval of the spectrum scanning.

[0076] 2. Environment level: The middle gray scale brightness Lmid = Lenv (Lenv is the ambient brightness), so as to basically ensure that the display brightness radiation does not exceed the overall environment.

[0077] 3. Comfort level: The maximum gray scale brightness Lmax = Lenv, so as to ensure that the display brightness does not exceed the maximum reflected light intensity of the display background environment, and the display effect is close to that of non-luminous objects. When the human eye views for a long time, it feels comfortable and not easy to get tired.

[0078] Usually, people can choose between the comfort level and the environment level for the display brightness. For long-term close viewing, they can choose to be closer to the comfort level.

[0079] In the environment level and the comfort level, the comfort level can also be classified according to the degree of brightness approaching the ambient light respectively, so that the vague anti-fatigue function has a quantifiable evaluation system, which helps to promote the improvement of the display quality. If only considering brightness fatigue, the classification is as follows:

[0080] Lmax < 1.5Lenv, for the first-level comfort;

[0081] 1.5Lenv < Lmax < 2Lenv, for the second-level comfort;

[0082] 2Lenv < Lmax < 3Lenv, for the third-level comfort;

[0083] 3L_ring < L_max < 4L_ring indicates four - level comfort;

[0084] L_max > 4L_ring indicates five - level comfort.

[0085] Above four - level comfort is suitable for presenting content with light emitters in the images. Level one to level two is suitable for presenting content without light emitters in the images. Level three is suitable for presenting mixed content.

[0086] If considering blue - light damage, the environmental factor H of the display device can be obtained according to the ratio of the display brightness L_s to the ambient brightness L_ring, that is, H = L_s / L_ring, where L_s is the display brightness of the display device when the exposure value of the display device showing a full - white screen is the same as the ambient light exposure value. Then, the blue - light protection comfort level standard can be formed according to the following classification:

[0087] L_max < 1.5HL_ring indicates first - level blue - light protection comfort

[0088] 1.5HL_ring < L_max < 2HL_ring indicates second - level blue - light protection comfort;

[0089] 2HL_ring < L_max < 3HL_ring indicates third - level blue - light protection comfort;

[0090] 3HL_ring < L_max < 4HL_ring indicates fourth - level blue - light protection comfort;

[0091] L_max > 4HL_ring indicates fifth - level blue - light protection comfort.

[0092] It can be understood that the first level is the best blue - light protection comfort and eye - care level, the second level is the next best, and so on. Such a quantitative classification and evaluation helps to distinguish the anti - fatigue ability of display devices and promote the improvement of display devices.

[0093] Figure 2 The flowchart of steps of another display parameter adjustment method according to Embodiment 1 of the present invention is shown. Referring to Figure 2 , the method may further include the following steps:

[0094] Step 104: Adjust the color temperature of the display device according to a preset sunlight color temperature.

[0095] Specifically, the color temperature of the display device can be adjusted by adjusting the gains of RGB (red, green, blue) three - color lights. Reducing the blue - light gain can reduce the color temperature and make the overall blue - light radiation intensity decrease. Therefore, this step can be specifically implemented through the following steps, including: adjusting the RGB gain parameters of the display device to the preset RGB gain parameters corresponding to the preset sunlight color temperature.

[0096] Among them, the preset sunlight color temperature can be set according to the sunlight color temperature of 6700K. Optionally, the preset sunlight color temperature is greater than or equal to 6000K (Kelvin) and less than or equal to 7200K, so that the color temperature of the displayed picture can be close to the sunlight color temperature of about 6700K, and the picture color temperature remains close to nature.

[0097] Further optionally, the display device may also be provided with a display page mode reminder function. The reminder function may remind the operator to use the window background dimming mode and the dimming mode as much as possible to reduce the unnoticed damage of the long-term blue light radiation of the display highlight window to the operator. Among them, the window background dimming mode is to set the theme color of the software window to a low-tone, low-saturation picture, such as a light gray window. The work page dimming mode is to set the work page of software such as word and excel to a low-tone, low-saturation picture, such as a bean paste green eye protection color page.

[0098] Further optionally, the grayscale brightness can be appropriately reduced according to the ambient brightness, and the color temperature can be appropriately increased based on the preset sunlight color temperature, thereby meeting people's requirements for the beauty of the picture while ensuring that the blue light radiation does not increase significantly.

[0099] The display parameter adjustment method provided by the embodiment of the present invention can be beneficial to reduce the damage of blue light of the display device to the human eye. The method can take the natural optical environment that humans have adapted to for a long time as a harmless and comfortable optical environment, take the natural optical environment equivalent to the optical environment (background) where the display device is located as the adjustment standard, and adjust the corresponding display parameters within an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images that are harmless to the human eye and feel comfortable.

[0100] The method detects the ambient brightness and adjusts the display parameters based on the key parameters of natural light at the same brightness, so that the exposure amount of blue light is the optimal blue light component exposure standard of the display device, so as to achieve an average harmful blue light component entering the eye that is as low as possible or close to the harmful blue light component entering the eye of natural light with the same brightness, thereby achieving a display effect that is harmless to the human eye and feels comfortable.

[0101] In an embodiment of the present invention, the ambient brightness can be detected first, and then the adjustment parameters of the display device corresponding to the preset conditions are determined, wherein the preset conditions include that the difference between the brightness of the middle grayscale of the display device and the ambient brightness is less than or equal to the preset brightness value, and then the brightness of at least part of the grayscale of the display device can be adjusted according to the adjustment parameters. In an embodiment of the present invention, when the brightness of the middle grayscale of the display image is consistent with the physiological balance point of the human eye under the same environment, the perception of the image is more comfortable and natural. Therefore, the natural optical environment in which the display device is located can be used as the adjustment standard, and the corresponding display parameters can be adjusted with an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images that are harmless to the human eye and feel comfortable.

[0102] Embodiment 2

[0103] Reference Figure 3 , shows a structural block diagram of a display parameter adjustment device according to Embodiment 2 of the present invention, the device 300 comprises:

[0104] A detection module 301 is used to detect the ambient brightness;

[0105] A determination module 302 is used to determine an adjustment parameter of a display device corresponding to a preset condition; the preset condition includes that a difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value;

[0106] The first adjustment module 303 is used to adjust the brightness of at least part of the grayscale of the display device according to the adjustment parameter.

[0107] Optionally, the determining module includes:

[0108] A first determination submodule, used to determine the maximum grayscale brightness of the display device corresponding to the preset condition;

[0109] The second determination submodule is used to determine the first backlight driving parameter corresponding to the maximum grayscale brightness according to a first corresponding relationship between the preset grayscale brightness and the backlight driving parameter, and use the first backlight driving parameter as the adjustment parameter.

[0110] Optionally, the first adjustment module includes:

[0111] The driving submodule is used to drive the backlight module of the display device according to the first backlight driving parameter so that the difference between the brightness of the intermediate gray scale and the ambient brightness is less than a preset brightness value.

[0112] Optionally, the determining module includes:

[0113] A third determination submodule is used to determine the ratio of the ambient brightness to the brightness before the intermediate grayscale adjustment to obtain an adjustment parameter of the display device;

[0114] A fourth determination submodule is used to determine the product of the first brightness of the target grayscale before adjustment and the adjustment parameter to obtain the second brightness of the target grayscale; the target grayscale is any grayscale of the display device, or any grayscale to be displayed;

[0115] The fifth determination submodule is used to determine the original grayscale corresponding to the second brightness according to a second corresponding relationship between the preset grayscale and the brightness before adjustment, and use the original grayscale as the adjustment parameter.

[0116] Optionally, the first adjustment module includes:

[0117] The display submodule is used to display according to the brightness of the original gray scale when the display condition of the target gray scale is met.

[0118] Optionally, the preset brightness value is greater than or equal to 0.2 times the ambient brightness and less than or equal to 1.6 times the ambient brightness.

[0119] Optionally, the device further comprises:

[0120] The second adjustment module is used to adjust the color temperature of the display device according to a preset sunlight color temperature.

[0121] Optionally, the second adjustment module includes:

[0122] The adjustment submodule is used to adjust the RGB gain parameters of the display device to preset RGB gain parameters corresponding to a preset sunlight color temperature.

[0123] Optionally, the preset sunlight color temperature is greater than or equal to 6000K and less than or equal to 7200K.

[0124] In an embodiment of the present invention, the ambient brightness can be detected by a detection module first, and then the adjustment parameter of the display device corresponding to the preset condition can be determined by a determination module, wherein the preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to the preset brightness value, and then the brightness of at least part of the gray scale of the display device can be adjusted according to the adjustment parameter by the first adjustment module. In an embodiment of the present invention, when the brightness of the middle gray scale of the display image is consistent with the physiological balance point of the human eye under the same environment, the perception of the image is more comfortable and natural. Therefore, the natural optical environment where the display device is located can be used as the adjustment standard, and the corresponding display parameters can be adjusted with an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images that are harmless to the human eye and feel comfortable.

[0125] Embodiment 3

[0126] The present invention also discloses a display device, wherein the display device uses the above display parameter adjustment method to adjust display parameters.

[0127] Optionally, the display device includes a backlight module, the ratio of the sum of the powers of the first light source band to the sum of the powers of the second light source band of the backlight module is less than 50%; the first light source band is [415,455] nanometers, and the second light source band is [400,500] nanometers.

[0128] That is, the peak of the blue light source in the backlight module can be moved toward the long-wave direction, and the sum of the blue light power in the 415nm-455nm band / the sum of the blue light power in the 400nm-500nm band is less than 50%. Since the blue light that is most harmful to the human eye is mainly short-wavelength blue light, by moving the peak of the blue light source in the backlight module toward the long-wave direction, the radiation of short-wavelength blue light to the human eye can be reduced, thereby reducing the radiation of short-wavelength blue light reaching the retina, thereby reducing the damage of short-wavelength blue light to the human eye, so that the display device can meet the eye protection certification standards such as VDE (Veldestination of Electrical Engineers Low Blue Light Eye Protection Certification).

[0129] Among them, moving the peak of the blue light source in the backlight module toward the long-wave direction can be achieved by adjusting the phosphor ratio of the light source in the backlight module, thereby reducing the proportion of blue light-emitting phosphors and thus reducing the radiation of short-wavelength blue light from the light source.

[0130] By performing power tests on the prototypes before and after the light source is improved, the test results shown in Table 1 below can be obtained.

[0131] Table 1

[0132]

[0133] According to Table 1 above, after the peak of the blue light source is moved toward the long-wave direction, the proportion of harmful short-wavelength blue light decreases, and the proportion of harmful blue light decreases with the increase of the peak wavelength. The color temperature of the above samples is ≤9600K, which can be achieved within the current color temperature range of the display device.

[0134] It should be noted that the data in Table 1 above do not limit the present invention.

[0135] In an embodiment of the present invention, the display device uses the above display parameter adjustment method to adjust the display parameters. First, the ambient brightness can be detected, and then the adjustment parameter of the display device corresponding to the preset condition can be determined, wherein the preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to the preset brightness value, and then the brightness of at least part of the gray scale of the display device can be adjusted according to the adjustment parameter. In an embodiment of the present invention, when the brightness of the middle gray scale of the display screen is consistent with the physiological balance point of the human eye under the same environment, the perception of the screen is more comfortable and natural. Therefore, the natural optical environment where the display device is located can be used as the adjustment standard, and the corresponding display parameters can be adjusted with an appropriate allowable floating range to approach this standard, so as to achieve the effect of displaying images without harm to the human eye and feeling comfortable. In addition, the ratio of the sum of the power of the first light source band of the light source of the backlight module of the display device to the sum of the power of the second band is less than 50%, so that the proportion of short-wavelength blue light can be reduced, further reducing the damage of blue light to the human eye.

[0136] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0137] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0138] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0139] The display parameter adjustment method, device and display device provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A display parameter adjustment method, characterized in that: include: Detect ambient brightness; Determining adjustment parameters of the display device corresponding to the preset conditions; The preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value; According to the adjustment parameter, adjusting the brightness of at least part of the grayscale of the display device; The brightness of the middle gray scale is the physiological balance point after the human eye adapts to the average brightness of the current environment; The step of determining the adjustment parameter of the display device corresponding to the preset condition includes: Determine the ratio of the ambient brightness to the brightness before the intermediate grayscale adjustment to obtain an adjustment parameter of the display device; Determine the product of the first brightness of the target grayscale before adjustment and the adjustment parameter to obtain the second brightness of the target grayscale; the target grayscale is any grayscale of the display device, or any grayscale to be displayed; According to a second corresponding relationship between a preset grayscale and the brightness before adjustment, an original grayscale corresponding to the second brightness is determined, and the original grayscale is used as the adjustment parameter.

2. The method according to claim 1, characterized in that: The step of adjusting the brightness of at least part of the grayscale of the display device according to the adjustment parameter comprises: When the display condition of the target gray scale is met, the display is performed according to the brightness of the original gray scale.

3. The method according to claim 1, characterized in that The preset brightness value is greater than or equal to 0.2 times the ambient brightness and less than or equal to 1.6 times the ambient brightness.

4. The method according to claim 1, characterized in that The method further comprises: The color temperature of the display device is adjusted according to the preset sunlight color temperature.

5. The method according to claim 4, characterized in that The step of adjusting the color temperature of the display device according to the preset sunlight color temperature includes: The RGB gain parameters of the display device are adjusted to preset RGB gain parameters corresponding to a preset sunlight color temperature.

6. The method according to claim 4, characterized in that The preset sunlight color temperature is greater than or equal to 6000K and less than or equal to 7200K.

7. A display parameter adjustment device, characterized in that: include: A detection module, used to detect ambient brightness; A determination module, used to determine the adjustment parameters of the display device corresponding to the preset conditions; The preset condition includes that the difference between the brightness of the middle gray scale of the display device and the ambient brightness is less than or equal to a preset brightness value; The brightness of the middle gray scale is the physiological balance point after the human eye adapts to the average brightness of the current environment; A first adjustment module, configured to adjust the brightness of at least part of the grayscale of the display device according to the adjustment parameter; Among them, the determination of the adjustment parameter of the display device corresponding to the preset condition includes: determining the ratio of the ambient brightness to the brightness before the intermediate grayscale is adjusted to obtain the adjustment parameter of the display device; determining the first brightness before the target grayscale is adjusted and multiplying it by the adjustment parameter to obtain the second brightness of the target grayscale; the target grayscale is any grayscale of the display device, or any grayscale to be displayed; according to the second corresponding relationship between the preset grayscale and the brightness before adjustment, determining the original grayscale corresponding to the second brightness, and using the original grayscale as the adjustment parameter.

8. A display device, characterized in that: The display device adjusts display parameters using the display parameter adjustment method according to any one of claims 1 to 6.

9. The display device according to claim 8, characterized in that: The display device includes a backlight module, wherein the ratio of the sum of the powers of the first light source band to the sum of the powers of the second light source band of the backlight module is less than 50%; the first light source band is [415, 455] nanometers, and the second light source band is [400, 500] nanometers.

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