CN114038440B - Display device and control method thereof - Google Patents
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- CN114038440B CN114038440B CN202111445443.8A CN202111445443A CN114038440B CN 114038440 B CN114038440 B CN 114038440B CN 202111445443 A CN202111445443 A CN 202111445443A CN 114038440 B CN114038440 B CN 114038440B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
Abstract
The present disclosure provides a display device and a control method thereof. The display device includes: a display panel including a plurality of display sections; and a control unit electrically coupled to the display module and configured to: determining a target display partition of the plurality of display partitions; smoothing the gray scale values of the plurality of pixel points of the target display partition to obtain updated gray scale values of the plurality of pixel points of the target display partition; and driving the target display partition of the display panel based on the updated gray-scale values of the plurality of pixel points of the target display partition.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display device and a control method thereof.
Background
Today, with the continuous development of information and display technologies, people have an increasingly high pursuit of display technical effects, and a traditional Liquid Crystal Display (LCD) has gradually failed to satisfy the pursuit of people for high contrast and high color gamut. In the related art, a plurality of light-emitting units in the backlight module are independently controlled as a group, namely, the partition control is realized, the local partition dimming can be realized, and the backlight module has higher brightness and contrast compared with the traditional backlight module. However, this control method has a halo problem, i.e. the boundary edge between the bright area and the dark area cannot be clearly demarcated, and a halo phenomenon is formed.
Disclosure of Invention
The present disclosure provides a display device and a control method thereof.
In a first aspect of the present disclosure, there is provided a display device including:
a display panel including a plurality of display sections; and
a control unit electrically coupled with the display module and configured to:
determining a target display partition of the plurality of display partitions;
smoothing the gray-scale values of the plurality of pixel points of the target display partition to obtain updated gray-scale values of the plurality of pixel points of the target display partition; and
and driving the target display subarea of the display panel based on the updated gray-scale values of the plurality of pixel points of the target display subarea.
In a second aspect of the present disclosure, there is provided a method of controlling a display apparatus including a display panel including a plurality of display sections, the method including:
determining a target display partition of the plurality of display partitions;
smoothing the gray-scale values of the plurality of pixel points of the target display partition to obtain updated gray-scale values of the plurality of pixel points of the target display partition; and
and driving the target display subarea of the display panel based on the updated gray-scale values of the plurality of pixel points of the target display subarea.
According to the display device and the control method thereof, the gray scale values of the multiple pixel points of the target display partition are checked by using the self-adaptive convolution for smooth processing, so that the gray scale transition of the pixel points is smoother, and the halo problem is improved.
Drawings
In order to more clearly illustrate the technical solutions in the present disclosure or related technologies, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, and it is obvious that the drawings in the following description are only embodiments of the present disclosure, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1A illustrates a schematic diagram of an exemplary display device provided by an embodiment of the present disclosure.
Fig. 1B shows a schematic diagram of an exemplary backlight module according to an embodiment of the disclosure.
Fig. 1C shows a sectional schematic view of an exemplary backlight module according to an embodiment of the disclosure.
FIG. 1D illustrates a partition diagram of an exemplary display panel according to an embodiment of the present disclosure.
FIG. 1E is a diagram illustrating a distribution of gray scale values of pixels of an exemplary display partition.
Fig. 1F is a schematic diagram illustrating a halo phenomenon of the partition corresponding to fig. 1E.
FIG. 1G is a schematic diagram of a gray scale distribution of pixels.
FIG. 1H is a schematic diagram illustrating the distribution of updated gray scale values of the corresponding display partition after the partition shown in FIG. 1E is processed by the smoothing algorithm.
Fig. 2 shows a flow diagram of an exemplary method provided by an embodiment of the present disclosure.
Detailed Description
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present disclosure should have a general meaning as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the disclosure is not intended to indicate any order, quantity, or importance, but rather to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Fig. 1A illustrates a schematic diagram of an exemplary display device 100 provided by an embodiment of the present disclosure.
As shown in fig. 1A, the display device 100 may include a display panel 102, a backlight module 104 and a control unit 106. The control unit 106 may further include one or more processors 1062, memory 1064, input/output interfaces 1066, a communication interface 1068, and a bus 1070. Wherein the processor 1062, memory 1064, input/output interface 1066, and communication interface 1068 are communicatively coupled to each other within the device via bus 1070.
The processor 1062 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the technical solutions provided in the embodiments of the present disclosure. In some embodiments, the processor 1062 may include other processing modules in the display device 100 for processing data, such as a timing control board (TCON). The timing control board (not shown in fig. 1A) may process an LVDS image data input signal (which may include RGB data signals, a clock signal, and a control signal), convert the processed input signal into an LVDS signal capable of driving the display panel 102, and send the LVDS signal to the LVDS receiving chips of the display panel 102 to drive the display panel 102 based on the LVDS signal. In some embodiments, the timing control board may also provide a driving signal for the backlight module 104 to control the backlight module 104 to light up.
The Memory 1064 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static Memory device, a dynamic Memory device, or the like. The memory 1064 may store an operating system and other application programs, and when the technical solution provided by the embodiments of the present specification is implemented by software or firmware, the relevant program codes are stored in the memory 108 and called by the processor 1062 for execution.
The input/output interface 1066 is used for connecting an input/output module to input and output information. For example, the input/output interface 1066 may be electrically coupled to the display panel 102 and the backlight module 104, respectively, to correspondingly output the control command generated by the processor 1062 to the display panel 102 and the backlight module 104, so as to control the display panel 102 to display the display data and control the backlight module 104 to light up. The i/o module may be configured as a component in a device (not shown) or may be external to the device to provide a corresponding function. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a speaker, a vibrator, an indicator light, etc.
The communication interface 1068 is used to connect a communication module (not shown) to enable the display apparatus 100 to interact with other devices. The communication module can realize communication in a wired mode (for example, USB, network cable, etc.), and can also realize communication in a wireless mode (for example, mobile network, WIFI, bluetooth, etc.).
It should be noted that, although the display device 100 only shows the display panel 102, the backlight module 104, and the control unit 106, in a specific implementation process, the display device 100 may further include other components necessary for achieving normal operation. In addition, it can be understood by those skilled in the art that the display device 100 may also include only the components necessary to implement the embodiments of the present description, and not necessarily all of the components shown in fig. 1A.
Fig. 1B shows a schematic diagram of an exemplary backlight assembly 104, according to an embodiment of the disclosure.
As shown in fig. 1B, a plurality of light emitting units 1042 may be arranged on the backlight module 104 in an array, and the light emitting units 1042 may be light emitting devices such as LEDs, minileds, and micro LEDs. In some embodiments, the light emitting units 1042 can be driven individually, i.e., each light emitting unit 1042 corresponds to an independent driving signal. In other embodiments, the backlight module 104 may be divided into a plurality of backlight partitions, and each backlight partition includes a plurality of light emitting units 1042. For example, as shown in fig. 1B, the backlight module 104 is divided into 16 backlight partitions by dotted lines. Each backlight partition may be driven individually, that is, the light emitting units 1042 in the same partition may be lighted by the same driving signal and have the same brightness. Such a backlight module with zone control may also be called a local dimming (local dimming) backlight module.
Fig. 1C shows a sectional schematic view of an exemplary backlight assembly 104, according to an embodiment of the disclosure.
As shown in FIG. 1C, the backlight module 104 is divided into 16 backlight partitions 104a to 104u. The plurality of light-emitting units in a single backlight partition are lighted by the same driving signal and have the same brightness.
FIG. 1D illustrates a partition diagram of an exemplary display panel 102, according to an embodiment of the disclosure.
As shown in fig. 1D, based on the partition manner of the backlight module 104, the display area of the display panel 102 can be divided into 16 display partitions 102a to 102u. Each display partition may include a plurality of pixels, and each pixel in a frame of display image may have a corresponding gray scale value, which is expressed in the display data for driving the display panel 102. The display sub-sections 102 a-102 u and the backlight sub-sections 104 a-104 u may be in one-to-one correspondence, i.e., the backlight sub-sections are used to provide the backlight of the display sub-section corresponding thereto. For example, backlight partition 104a is used to provide backlight for display partition 102a, backlight partition 104b is used to provide backlight for display partition 102b, and so on.
In some cases, when driving each backlight partition of the backlight module 104, a driving signal may be provided according to a maximum gray scale value of all pixels of the display partition corresponding to the backlight partition, where the driving signal may be a Pulse Width Modulation (PWM) signal, and the PWM signal corresponding to the backlight partition may have a duty ratio related to the number of pixels having the maximum gray scale value.
FIG. 1E is a diagram illustrating a distribution of gray scale values of pixels of an exemplary display partition.
As shown in fig. 1E, assuming that 6 pixels in the middle of the display partition are L255 gray scales, and surrounding pixels are all L0 gray scales, in order to provide the backlight that satisfies the L255 gray scales for the 6 pixels in the middle of the display partition, the PWM signal of the corresponding backlight partition is not zero, but has a voltage corresponding to the maximum brightness in a certain time period within the lighting period of the backlight partition. Thus, when the backlight partition is lit, there are pixels with light transmission L0 gray scale, and there is halo in the display effect after the final display partition and the backlight partition are superimposed, as shown in fig. 1F.
In view of this, the display device 100 provided by the embodiment of the disclosure can solve the halo problem to some extent.
The control unit 106 (e.g., TCON) of the display device 100 may first determine a target display partition in the display panel 102 according to the data to be displayed, where the target display partition may be a display partition that needs to be smoothed by an adaptive convolution kernel.
In some embodiments, the control unit 106 may determine the target display partition in the following manner.
The control unit 106 may first determine the first display section among the plurality of display sections of the display panel 102. For example, taking fig. 1D as an example, one display partition may be determined as the first display partition in order from left to right and from top to bottom.
Next, the control unit 106 may determine a first pixel point and a second pixel point of the plurality of pixel points of the first display partition; acquiring a gray scale value of the first pixel point and a gray scale value of the second pixel point; determining whether the difference value between the gray-scale value of the first pixel point and the gray-scale value of the second pixel point is greater than a gray-scale difference threshold value; and determining the first display subarea as a target display subarea in response to the fact that the difference value between the gray-scale value of the first pixel point and the gray-scale value of the second pixel point is larger than a gray-scale difference threshold value.
For example, taking fig. 1E as an example, one pixel point may be sequentially determined as the first pixel point from left to right and from top to bottom, and then, under the condition that the first pixel point is not changed, another pixel point may be sequentially determined as the second pixel point from left to right and from top to bottom. For example, the leftmost pixel point in the first row of fig. 1E is determined as the first pixel point, the pixel point in the first row of fig. 1E adjacent to the first pixel point is determined as the second pixel point, and then the gray scale difference between the first pixel point and the second pixel point is compared to determine whether the gray scale difference is greater than the gray scale difference threshold. If the gray scale difference between the first pixel point and the second pixel point is smaller than the gray scale difference threshold, the pixel point in the first row of fig. 1E, which is one pixel point away from the first pixel point, is selected as the second pixel point, and the gray scale difference between the first pixel point and the second pixel point is compared again to determine whether the gray scale difference between the first pixel point and the second pixel point is larger than the gray scale difference threshold. And repeating the steps until the gray scale difference between the two pixel points in the display partition is larger than the gray scale difference threshold value, and determining that the display partition is the target display partition.
In some embodiments, the control unit 106 may perform the aforementioned process of determining the target display partition for each display partition of the display panel 102, mark all target display partitions determined in the above manner (the gray level transition between pixels is greater than the gray level threshold), and perform the smoothing process for the marked target display partitions subsequently. In addition, in some embodiments, the coordinates of all the pixel points of the target display partition and the plurality of display partitions adjacent to the target display partition may also be calculated and stored in the memory for subsequent calculation. The number of display sections adjacent to the target display section may be 8 or more. Meanwhile, the more the number of target display partitions to be processed is marked, the more slight the halo phenomenon after processing.
After determining the target display partition, the control unit 106 may perform smoothing processing (for example, performing smoothing processing by using an adaptive convolution kernel) on the gray scale values of the plurality of pixel points of the target display partition, so as to obtain updated gray scale values of the plurality of pixel points of the target display partition.
In some embodiments, the control unit 106 may further determine a display partition (e.g., eight display partitions in the periphery) adjacent to the target display partition, and then perform a smoothing process on the gray scale values of the plurality of pixel points of the target display partition (e.g., the display partition 102f of fig. 1D) and the gray scale values of the plurality of pixel points of the display partition (e.g., the display partitions 102a, 102b, 102c, 102e, 102g, 102j, 102k, 102m, and 102f of fig. 1D) adjacent to the target display partition by using an adaptive convolution check to obtain updated gray scale values of the plurality of pixel points of the target display partition and updated gray scale values of the plurality of pixel points of the display partition adjacent to the target display partition.
In some embodiments, the data of the target display region marked as described above may be smoothed, the idea of smoothing being primarily to make the gray level transition smoother. Such as the L255 gray level to L0 gray level, and the L128 gray level can be introduced in the middle. In this embodiment, a convolution kernel algorithm for adaptive adjustment according to a distance (the distance can be calculated by a pixel coordinate) is introduced to smooth each pixel point of the marked target display partition.
In some embodiments, the control unit 106 may determine a target pixel point in the target display partition, where the target pixel point is a pixel point with a largest gray scale value among all pixel points in the target display partition. Then, the control unit 106 may perform smoothing processing on the gray scale values of the plurality of pixels of the target display partition and the gray scale values of the plurality of pixels of the display partition adjacent to the target display partition by using an adaptive convolution kernel (for example, a 9 × 9 convolution kernel) based on the target pixel, so as to obtain updated gray scale values of the plurality of pixels of the target display partition and updated gray scale values of the plurality of pixels of the display partition adjacent to the target display partition.
FIG. 1G is a schematic diagram of a gray scale distribution of pixels.
As shown in fig. 1G, the distance between the target pixel 1022a and the pixel 1022b is d1, the distance between the target pixel 1022a and the pixel 1022c is d2, wherein the gray scale value of the target pixel 1022a is L255, and the gray scale values of the pixel 1022b and the pixel 1022c are L0, if the original driving method is adopted, a severe halo phenomenon occurs.
In this embodiment, the value of the convolution kernel is adaptively adjusted according to the distance between the pixel point and the peak point, the obtained convolution kernel recalculates the gray scale of the corresponding pixel point, so that the L255 gray scale value of the target pixel point 1022a outputs a gray scale value lower than L255 after convolution processing, and the L0 gray scale values of the pixel point 1022b and the pixel point 1022c output a gray scale value higher than L0 after convolution processing. And repeating the steps until the target display subarea and the adjacent display subareas of the target display subarea are reached, so as to redefine the pixel gray-scale values of the target display subarea and the adjacent display subareas of the target display subarea and further weaken the halo phenomenon.
The principle of the adaptive convolution kernel based smoothing algorithm of the present embodiment is as follows.
As shown in fig. 1G, d1 is a distance between the target pixel 1022a and the pixel 1022b, and is obtained by calculating coordinates of the target pixel 1022a and the pixel 1022b, and the target pixel 1022a can be regarded as a peak point.
In some embodiments, the center weight m of the adaptive convolution kernel is calculated using the following formula:
x＝α×d
the remaining weights q of the adaptive convolution kernel are calculated using the following formula:
wherein d is the distance between the pixel point and the target pixel point, x is the adaptive adjustment parameter of the pixel point which is away from the target pixel point by the distance d, n is the size of the adaptive convolution kernel, and alpha is the smoothness parameter, wherein the value of the reference parameter alpha is larger along with the increase of the distance d.
Wherein, a is used as the smoothness parameter and can be defined according to the gray scale difference between the target pixel 1022a and the pixel 1022b, and the larger the gray scale difference is, the larger the α value is. Here, a reference table set in advance may be used, and the control unit 102 may directly look up the table according to the calculated gray-scale difference to obtain the α value. For example, the calculated gray level difference is 50, α is 0.2, the calculated gray level difference is 80, and α is 0.3.
x is used as a self-adaptive adjustment parameter, and the value of x is different along with the difference of the distance d between the target pixel 1022a and the pixel 1022b, so that the self-adaptive convolution kernel center weight m is also different, and the self-adaptive adjustment of the convolution kernel center weight and the distance is further realized. After the m value and the q value are calculated, the gray value actually needed to be output by the target pixel 1022a (updated gray value) is obtained by multiplying the original gray value of the target pixel 1022a by m. After the q value is calculated, the gray value actually required to be output by the pixel 1022b (updated gray value) is obtained by multiplying the original gray value of the pixel 1022b by q.
n is the size of the convolution kernel, for example, one convolution kernel of 3 × 3, the size of which is 3 × 3=9.
FIG. 1H is a schematic diagram of the distribution of updated gray scale values of the corresponding display partition after the partition shown in FIG. 1E is processed by the smoothing algorithm. As shown in FIG. 1H, the transition of the updated gray level values for the display partition is smoother.
After obtaining the updated gray scale values of the pixel points based on the smoothing algorithm, the control unit 106 may drive the target display partition of the display panel based on the updated gray scale values of the plurality of pixel points of the target display partition.
In some embodiments, the control unit 106 may drive the target display partition of the display panel and the display partition adjacent to the target display partition based on the updated gray-scale values of the plurality of pixel points of the target display partition and the updated gray-scale values of the plurality of pixel points of the display partition adjacent to the target display partition.
In some embodiments, the control unit 106 may determine a target backlight partition corresponding to the target display partition; determining the brightness value of the target backlight partition according to the updated gray-scale values of the plurality of pixel points of the target display partition; and driving the target backlight partition according to the brightness value of the target backlight partition.
In some embodiments, the control unit 106 may determine a pulse width modulation signal of the target backlight partition (e.g., a PWM duty cycle of the target backlight partition) according to the brightness value of the target backlight partition; and driving the target backlight partition based on the pulse width modulation signal. In some embodiments, the PWM duty cycle may be processed with the adaptive convolution kernel as described above.
Therefore, when the same partition PWM is not 0 but the gray scale value transition of the pixel point is large, the pixel gray scales in the partitions are redefined by introducing the adaptive convolution kernel, so that the transition between the pixel gray scales is reduced, the convolution kernel calculates the PWM duty ratio again after smoothing, and finally the display is finished. In some embodiments, the concept of convolution kernel smoothing may also be applied to partition-to-partition processing, and to partition-to-partition processing of PWM output duty cycles.
In order to reduce the problem of halo of the mini LED, the display device 100 according to the embodiment of the present disclosure adaptively adjusts the value of the convolution kernel according to the distance between the pixel gray scale value and the peak point in the partition or between the partitions, and performs smoothing processing on the corresponding pixel data by using the convolution kernel, so that the pixel gray scale is excessively reduced, thereby reducing the halo problem.
The embodiment of the disclosure also provides a control method of the display device, which can solve the problem of halo to a certain extent. Fig. 2 illustrates a flow diagram of an exemplary method 200 provided by an embodiment of the present disclosure. The method 200 may be implemented by the display device 100. As shown in fig. 2, the method 200 may further include the following steps.
At step 202, a target display partition of the plurality of display partitions is determined.
In step 204, smoothing is performed on the gray scale values of the plurality of pixel points of the target display partition to obtain updated gray scale values of the plurality of pixel points of the target display partition.
In step 206, the target display partition of the display panel is driven based on the updated gray-scale values of the plurality of pixel points of the target display partition.
In some embodiments, smoothing the gray scale values of the plurality of pixel points of the target display partition to obtain updated gray scale values of the plurality of pixel points of the target display partition includes: determining a display partition adjacent to the target display partition; and adopting self-adaptive convolution to check the gray scale values of the plurality of pixel points of the target display subarea and the gray scale values of the plurality of pixel points of the display subarea adjacent to the target display subarea for smoothing treatment, so as to obtain the updated gray scale values of the plurality of pixel points of the target display subarea and the updated gray scale values of the plurality of pixel points of the display subarea adjacent to the target display subarea.
In some embodiments, driving the target display partition of the display panel based on the updated gray scale values of the plurality of pixel points of the target display partition comprises: and driving the target display subarea and the display subarea adjacent to the target display subarea of the display panel based on the updated gray-scale values of the pixels of the target display subarea and the updated gray-scale values of the pixels of the display subarea adjacent to the target display subarea.
In some embodiments, determining a target display partition of the plurality of display partitions comprises: determining a first display partition of the plurality of display partitions, the first display partition comprising a plurality of pixel points; determining a first pixel point and a second pixel point in a plurality of pixel points of the first display partition; acquiring the gray-scale value of the first pixel point and the gray-scale value of the second pixel point; determining whether the difference value between the gray-scale value of the first pixel point and the gray-scale value of the second pixel point is greater than a gray-scale difference threshold value; and in response to determining that the difference between the gray scale value of the first pixel and the gray scale value of the second pixel is greater than a gray scale difference threshold, determining the first display partition as the target display partition.
In some embodiments, smoothing the gray-scale values of the plurality of pixels of the target display partition by using an adaptive convolution kernel to obtain updated gray-scale values of the plurality of pixels of the target display partition includes: determining a target pixel point in the target display partition, wherein the target pixel point is the pixel point with the maximum gray scale value in all the pixel points in the target display partition; based on the target pixel point, adopting self-adaptive convolution to check the gray-scale values of the plurality of pixel points of the target display subarea and the gray-scale values of the plurality of pixel points of the display subarea adjacent to the target display subarea for smoothing treatment, so as to obtain the updated gray-scale values of the plurality of pixel points of the target display subarea and the updated gray-scale values of the plurality of pixel points of the display subarea adjacent to the target display subarea.
In some embodiments, the center weight m of the adaptive convolution kernel is calculated using the following formula:
x＝α×d
the remaining weights q of the adaptive convolution kernel are calculated using the following formula:
wherein d is the distance between the pixel point and the target pixel point, x is the adaptive adjustment parameter of the pixel point which is away from the target pixel point by the distance d, n is the size of the adaptive convolution kernel, and alpha is the smoothness parameter, wherein the smoothness parameter alpha is larger as the distance d increases.
In some embodiments, the method 200 further comprises: determining a target backlight partition corresponding to the target display partition; determining the brightness value of the target backlight partition according to the updated gray-scale values of the plurality of pixel points of the target display partition; and driving the target backlight partition according to the brightness value of the target backlight partition.
In some embodiments, driving the target backlight partition according to its luminance values comprises: determining a pulse width modulation signal of the target backlight partition according to the brightness value of the target backlight partition; and driving the target backlight partition based on the pulse width modulation signal.
It should be noted that the method of the embodiments of the present disclosure may be executed by a single device, such as a computer or a server. The method of the embodiment can also be applied to a distributed scene and completed by the mutual cooperation of a plurality of devices. In such a distributed scenario, one of the devices may only perform one or more steps of the method of the embodiments of the present disclosure, and the devices may interact with each other to complete the method.
It should be noted that the above describes some embodiments of the disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments described above and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The display device 100 of the foregoing embodiment may be used to implement the corresponding method 200 of any of the foregoing embodiments, and therefore, the method embodiment has the beneficial effects of the corresponding device embodiment, and details are not repeated here.
Based on the same inventive concept, corresponding to any of the above-described embodiment methods, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform the method 200 according to any of the above embodiments.
Computer-readable media, including both permanent and non-permanent, removable and non-removable media, for storing information may be implemented in any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
The computer instructions stored in the storage medium of the foregoing embodiment are used to enable the computer to execute the method 200 according to any embodiment, and have the beneficial effects of the corresponding method embodiment, which are not described in detail herein.
Based on the same inventive concept, corresponding to any of the embodiment methods 200 described above, the present disclosure also provides a computer program product comprising a computer program. In some embodiments, the computer program is executable by one or more processors to cause the processors to perform the method 200. Corresponding to the execution subject corresponding to each step in the embodiments of the method 200, the processor executing the corresponding step may be the corresponding execution subject.
The computer program product of the foregoing embodiment is used for enabling a processor to execute the method 200 according to any of the foregoing embodiments, and has the advantages of corresponding method embodiments, which are not described herein again.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the present disclosure, also technical features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present disclosure as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the disclosure. Further, devices may be shown in block diagram form in order to avoid obscuring embodiments of the disclosure, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the disclosure are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the disclosure, it should be apparent to one skilled in the art that the embodiments of the disclosure can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present disclosure has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures, such as Dynamic RAM (DRAM), may use the discussed embodiments.
The disclosed embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalents, improvements, and the like that may be made within the spirit and principles of the embodiments of the disclosure are intended to be included within the scope of the disclosure.
Claims (9)
1. A display device, comprising:
a display panel including a plurality of display sections; and
a control unit electrically coupled with the display module and configured to:
determining a target display partition of the plurality of display partitions;
determining a target pixel point in the target display partition, wherein the target pixel point is the pixel point with the maximum gray scale value in all the pixel points in the target display partition;
determining a display partition adjacent to the target display partition;
based on the target pixel point, adopting self-adaptive convolution to check gray-scale values of a plurality of pixel points of the target display subarea and gray-scale values of a plurality of pixel points of a display subarea adjacent to the target display subarea for smoothing treatment to obtain updated gray-scale values of a plurality of pixel points of the target display subarea and updated gray-scale values of a plurality of pixel points of a display subarea adjacent to the target display subarea;
driving the target display partition and a display partition adjacent to the target display partition of the display panel based on updated gray-scale values of a plurality of pixel points of the target display partition and updated gray-scale values of a plurality of pixel points of a display partition adjacent to the target display partition;
and the value of the self-adaptive convolution kernel is self-adaptively adjusted according to the distance between the pixel point and the peak value point, and the target pixel point is the peak value.
2. The display device of claim 1, wherein the control unit is further configured to:
determining a first display partition of the plurality of display partitions, the first display partition comprising a plurality of pixel points;
determining a first pixel point and a second pixel point in a plurality of pixel points of the first display partition;
acquiring the gray-scale value of the first pixel point and the gray-scale value of the second pixel point;
determining whether the difference value between the gray-scale value of the first pixel point and the gray-scale value of the second pixel point is greater than a gray-scale difference threshold value; and
and determining the first display subarea as the target display subarea in response to the fact that the difference value between the gray-scale value of the first pixel point and the gray-scale value of the second pixel point is larger than a gray-scale difference threshold value.
3. The display device of claim 1, wherein the smoothing is less as the distance between the pixel point and the target pixel point increases.
4. The display device according to claim 1,
the central weight m of the self-adaptive convolution kernel is calculated by adopting the following formula:
x＝α×d
the remaining weight q of the adaptive convolution kernel is calculated by adopting the following formula:
wherein d is the distance between the pixel point and the target pixel point, x is the adaptive adjustment parameter of the pixel point which is away from the target pixel point by the distance d, n is the size of the adaptive convolution kernel, and alpha is the smoothness parameter, wherein the smoothness parameter alpha has a larger value as the gray scale difference value between the pixel point and the target pixel point increases.
5. The display device of claim 1, wherein the display device further comprises a backlight module comprising a plurality of backlight partitions; the control unit further configured to:
determining a target backlight partition corresponding to the target display partition;
determining the brightness value of the target backlight partition according to the updated gray-scale values of the plurality of pixel points of the target display partition; and
and driving the target backlight subarea according to the brightness value of the target backlight subarea.
6. The display device of claim 5, wherein the control unit is further configured to:
determining a pulse width modulation signal of the target backlight partition according to the brightness value of the target backlight partition; and
driving the target backlight partition based on the pulse width modulation signal.
7. The display device of any one of claims 1-6, wherein the display device is a local dimming display device and the backlight module comprises miniLEDs arranged in an array.
8. A method of controlling a display device, the display device comprising a display panel, the display panel comprising a plurality of display sections, the method comprising:
determining a target display partition of the plurality of display partitions;
determining a target pixel point in the target display partition, wherein the target pixel point is the pixel point with the maximum gray scale value in all the pixel points in the target display partition;
determining a display partition adjacent to the target display partition;
based on the target pixel point, adopting self-adaptive convolution to check gray-scale values of a plurality of pixel points of the target display subarea and gray-scale values of a plurality of pixel points of a display subarea adjacent to the target display subarea for smoothing treatment to obtain updated gray-scale values of a plurality of pixel points of the target display subarea and updated gray-scale values of a plurality of pixel points of a display subarea adjacent to the target display subarea;
driving the target display partition and a display partition adjacent to the target display partition of the display panel based on updated gray-scale values of a plurality of pixel points of the target display partition and updated gray-scale values of a plurality of pixel points of a display partition adjacent to the target display partition;
and the value of the self-adaptive convolution kernel is self-adaptively adjusted according to the distance between the pixel point and the peak value point, and the target pixel point is the peak value.
9. The method of claim 8, wherein the display device further comprises a backlight assembly comprising a plurality of backlight partitions, the method further comprising:
determining a target backlight partition corresponding to the target display partition;
determining the brightness value of the target backlight partition according to the updated gray-scale values of the plurality of pixel points of the target display partition; and
and driving the target backlight subarea according to the brightness value of the target backlight subarea.
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|---|
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