CN115691431A

CN115691431A - Optical compensation method, optical compensation device, electronic equipment and storage medium

Info

Publication number: CN115691431A
Application number: CN202110875257.1A
Authority: CN
Inventors: 陈浩
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2023-02-03

Abstract

The application discloses an optical compensation method, an optical compensation device, electronic equipment and a storage medium. The method comprises the following steps: determining a first set based on a first parameter corresponding to each backlight partition in a backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight subarea; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region characterizes a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area; and under the condition that the first set does not meet the set condition, adjusting a first parameter corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the set condition.

Description

Optical compensation method, optical compensation device, electronic equipment and storage medium

Technical Field

The present application relates to the field of display technologies, and in particular, to an optical compensation method and apparatus, an electronic device, and a storage medium.

Background

Liquid Crystal Display (LCD) devices are widely used because of their advantages such as light weight, long life, and excellent Display screen. LCD devices are typically composed of two parts: LCD panel and backlight unit. In the related art, due to the influence of factors such as the process parameter fluctuation of the LCD panel and the light source arrangement of the backlight module, the LCD device has a problem of poor picture display quality when picture display is realized.

Disclosure of Invention

In view of the above, embodiments of the present disclosure provide an optical compensation method, an optical compensation device, an electronic apparatus, and a storage medium, so as to solve at least the problem of poor image display quality of the related art LCD device.

The technical scheme of the embodiment of the application is realized as follows:

the embodiment of the application provides an optical compensation method, which comprises the following steps:

determining a first set based on a first parameter corresponding to each backlight partition in a backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight subarea; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region represents a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area;

and under the condition that the first set does not meet the set condition, adjusting a first parameter corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the set condition.

In the above scheme, the setting condition indicates that all the first difference values are smaller than a first threshold value; the first difference value represents the difference value of the second parameters corresponding to two areas meeting the set position relation on the display panel.

In the above solution, the two regions on the display panel that satisfy the set positional relationship include a second region and a third region; the second area represents a first area where a center point of the display panel is located; the third area represents any first area except the second area on the display panel;

the adjusting the first parameter corresponding to each backlight partition in the at least one backlight partition comprises:

and adjusting the first parameter of the backlight partition corresponding to the third area based on the second parameter of the second area and the second parameter of the third area.

In the foregoing solution, the adjusting the first parameter of the backlight partition corresponding to the third area includes:

under the condition that the second parameter of the third area is smaller than the second parameter of the second area, multiplying the first parameter of the backlight partition corresponding to the third area by a first coefficient; the first coefficient is greater than 1;

under the condition that the second parameter of the third area is larger than that of the second area, multiplying the first parameter of the backlight partition corresponding to the third area by a second coefficient; the second coefficient is less than 1.

In the above solution, two regions on the display panel that satisfy the set positional relationship are characterized as two laterally adjacent first regions or two longitudinally adjacent first regions.

In the foregoing solution, the adjusting the first parameter corresponding to each backlight partition in the at least one backlight partition includes:

under the condition that the corresponding first difference is larger than the second difference, adjusting a first parameter of a backlight partition corresponding to each of two first areas meeting the set position relationship;

under the condition that the corresponding first difference is not larger than the second difference, adjusting a first parameter of a backlight partition corresponding to the fourth area according to the first difference; the fourth area characterizes a first area determined based on a set rule among two first areas satisfying a set positional relationship;

the second difference value represents a difference value of third parameters of two first areas meeting a set position relation; the third parameter characterizes the second parameter when no optical compensation is performed.

In the above scheme, the number of the backlight partitions in the backlight module is greater than or equal to 200.

In the above scheme, the method further comprises:

after the adjusted first set meets the set condition, storing the first parameter and the fourth parameter corresponding to each adjusted backlight partition in an associated manner; wherein the content of the first and second substances,

the fourth parameter represents a set circuit characteristic parameter input to the display panel.

An embodiment of the present application further provides an optical compensation apparatus, including:

the testing unit is used for determining a first set based on a first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight partition; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region represents a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area;

and the adjusting unit is used for adjusting the first parameter corresponding to each backlight partition in at least one backlight partition under the condition that the first set does not meet the set condition until the adjusted first set meets the set condition.

An embodiment of the present application further provides an electronic device, including: a processor and a memory for storing a computer program capable of running on the processor,

wherein the processor is configured to execute the steps of the optical compensation method when running the computer program.

The embodiment of the present application also provides a storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the above optical compensation method.

In this embodiment of the present application, based on a circuit characteristic parameter corresponding to each backlight partition in a backlight module of a display device, a set of optical characteristic parameters of a first area corresponding to each backlight partition on a display panel is determined to be a first set, and when the determined first set does not satisfy a setting condition, the circuit characteristic parameters of each backlight partition in at least one backlight partition are adjusted, and the above steps are repeated until the obtained first set satisfies the setting condition.

Drawings

Fig. 1 is a schematic flow chart illustrating an implementation of an optical compensation method according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram illustrating a display panel being divided into regions according to backlight partitions of a backlight module according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram illustrating a display panel being divided into regions according to backlight partitions of a backlight module according to another embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a combination of regions provided by an embodiment of the present application;

FIG. 5 is a schematic view of a combination of regions according to another embodiment of the present application;

FIG. 6 is a schematic view of a combination of regions according to yet another embodiment of the present application;

FIG. 7 is a schematic diagram illustrating a comparison of regions of a positional relationship provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of a display panel area provided in an embodiment of the present application;

fig. 9 is a schematic flow chart illustrating an implementation of a brightness compensation method according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of an optical compensation structure provided in an embodiment of the present application;

fig. 11 is a schematic diagram of a hardware component structure of an electronic device according to another embodiment of the present application.

Detailed Description

The LCD device has been widely used due to its advantages of light weight, long life span, excellent display screen, etc. Since the LCD panel does not emit light, and the light generated by the backlight module is required to display images, the backlight module becomes an indispensable part of the LCD. The current backlight module is mainly divided into a side-in type backlight module and a direct type backlight module according to different LED light emitting forms.

In the related art, since different types of Mura are formed due to fluctuation of process parameters of the LCD panel, there is a difference in brightness between a Mura region and a normal region during display, resulting in non-uniform brightness of the LCD panel. In order to improve the uniformity of the brightness of the LCD panel, at present, an external camera can be used for shooting a gray scale picture, the difference between the brightness of the peripheral area and the brightness of the central position is calculated by comparing the brightness of the central position of the LCD panel, the reversely compensated data is stored in a flash memory (flash) of an LCD panel circuit, and then the gray scale of a Mura area is reversely compensated, so that the overall brightness of the LCD panel is relatively uniform. Because the LCD panel does not emit light, when the large-size direct type backlight module is matched, the backlight module also has the problem of uneven brightness, even if the LCD panel is subjected to optical compensation, the uneven brightness of the LCD panel is only improved, but when the direct type backlight module with uneven brightness is matched, the LCD device still has the problem of uneven picture brightness.

The light source arrangement of the backlight module, such as the difference in the LED density and arrangement at the center and edge, also causes uneven brightness, and the current improvement method includes printing dots on optical members such as a reflector or a diffuser, and adding an optical film. Because the LCD panel and the direct type backlight module have the problem of uneven brightness, the LCD device has the problem of poor picture display quality when picture display is realized.

Based on this, in various embodiments of the present application, a set of optical characteristic parameters of a first area, corresponding to each backlight partition in a backlight module of a display device, is determined as a first set based on a circuit characteristic parameter corresponding to each backlight partition, and in a case that the determined first set does not satisfy a setting condition, the circuit characteristic parameters of each backlight partition in at least one backlight partition are adjusted, and the above steps are repeated until the obtained first set satisfies the setting condition, so that by adjusting the circuit characteristic parameters of at least one backlight partition of the backlight module, the optical characteristic parameters represented by each point of the display device are uniform, thereby improving the display quality of the display device when displaying a picture.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Fig. 1 is a schematic implementation flow diagram of an optical compensation method according to an embodiment of the present disclosure. As shown in fig. 1, the optical compensation method includes:

step 101: and determining a first set based on a first parameter corresponding to each backlight partition in a backlight module of the display device.

The first parameter represents a circuit characteristic parameter of a backlight partition corresponding to the input; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region characterizes a corresponding region on a display panel of the display device; the second parameter characterizes an optical characteristic parameter of the corresponding first region.

For a display device, due to the influence of factors such as the fluctuation of the processing parameters of a display panel and the arrangement of light sources of a backlight module, different types of Mura can be formed, and the brightness of a Mura area and the brightness of a normal area are different during display, so that the display is not uniform. In the embodiment of the present application, the display device that performs optical compensation generally has a Mura region and a normal region, and there is a problem that the screen brightness is not uniform when displaying. The adopted backlight module needs to support the function of Local Dimming technology, and the nine-point backlight uniformity of the backlight module is usually not lower than 70%.

Here, the display panel is divided into regions according to the backlight partition of the backlight module, so as to obtain corresponding first regions. When the first region of the display panel is divided, one backlight partition shown in fig. 2 may correspond to the first region of one display panel, or a plurality of adjacent backlight partitions shown in fig. 3 may correspond to the first region of one display panel, that is, each first region may correspond to one backlight partition, or may correspond to two or more adjacent backlight partitions. Because there is slight difference in size between the backlight module and the display panel, the area at the outermost periphery of the display panel cannot completely correspond to the size of the backlight partition, and then corresponds to the actual size.

Fig. 2 is a schematic diagram illustrating the region division of the display panel according to the backlight partition of the backlight module, and as shown in fig. 2, the display panel is partitioned according to the same region and area as the backlight partition, and is numbered correspondingly. Here, the numbers of the backlight partitions of the backlight module correspond to the numbers of the first areas of the display panel one by one, and the numbers 1 to 18 of the backlight partitions of the backlight module correspond to the numbers 1 to 18 of the first areas of the display panel.

Fig. 3 is another schematic diagram illustrating the division of the display panel according to the backlight partition of the backlight module, as shown in fig. 3, two adjacent backlight partitions of the backlight module are divided into one area, and the display panel is divided and numbered correspondingly. Here, the number of the backlight partition of the backlight module corresponds to the number of the first area of the display panel, the number 1 and the number 2 backlight partitions of the backlight module correspond to the number 1 first area of the display panel, the number 3 and the number 4 backlight partitions of the backlight module correspond to the number 2 first area of the display panel, and so on, the number 17 and the number 18 backlight partitions of the backlight module correspond to the number 9 first area of the display panel.

And inputting corresponding circuit characteristic parameters to each backlight subarea in the backlight module of the display device to lighten the backlight module. Inputting set circuit characteristic parameters into the display panel, and collecting second parameters L of each first region by an instrument _x And determining the collected set of the second parameters as a first set. Here, the circuit characteristic parameter corresponding to each backlight partition includes a current parameter and/or a voltage parameter, and the second parameter characterizes an optical characteristic parameter. For the second parameter acquisition of each region, a Charge-coupled Device (CCD) and/or a spectrometer is usually used to acquire the optical characteristic parameters of the center point of each region, wherein the optical characteristic parameters at least include brightness. The first set may correspondingly characterize the optical characteristic parameters of each first region in the form of a matrix. For example, the display panel shown in FIG. 3 has 9 first regions, and the corresponding first set may be

Step 102: and under the condition that the first set does not meet the set condition, adjusting a first parameter corresponding to each backlight partition in at least one backlight partition until the adjusted first set meets the set condition.

And under the condition that the determined first set does not meet the set conditions, adjusting the first parameters of each backlight partition in at least one backlight partition, inputting the adjusted first parameters into the corresponding backlight partition of the backlight module, collecting the second parameters of each first area of the adjusted display panel, determining the first set, judging whether the adjusted first set meets the set conditions or not, if not, repeating the steps until the determined first set meets the set conditions after the first parameters are adjusted, and then not adjusting the first parameters. In practical applications, when the adjusted first set satisfies the setting condition, the set of the first parameters corresponding to the first set at that time is stored as a second set, and the stored second set can be used as the optical characteristic parameters for reference use of the display device when displaying, so as to improve the display quality of the display device when displaying the image.

In an embodiment, the setting condition indicates that all the first difference values are smaller than a first threshold value; the first difference value represents the difference value of second parameters corresponding to two areas meeting the set position relation on the display panel.

And when judging whether the obtained first set meets the set condition, comparing second parameters corresponding to any two regions meeting the set position relation on the display panel based on the obtained first set to obtain a corresponding first difference value, and judging whether the first difference value is larger than a first threshold value according to the obtained first difference value. Here, the two regions satisfying the set positional relationship include, but are not limited to: two adjacent regions; two regions that are not adjacent but are adjacent to the same region; the area of the central point and any area except the area of the central point.

When comparing any two second parameters corresponding to the areas meeting the set position relationship on the display panel, taking any two areas meeting the set position relationship on the display panel as one combination, comparing whether a first difference value of the second parameters corresponding to each combination in all the combinations is larger than a first threshold value, under the condition that all the combinations meet the set condition, not adjusting the first parameters, and if at least one combination does not meet the set condition, repeating the steps of adjusting the first parameters and collecting the second parameters. The first threshold value characterizes a maximum acceptable difference between optical characteristic parameters for two areas of the display panel that satisfy a set positional relationship when the display device is optically compensated.

In practical application, because the application occasions of the display device are wide, the shape of the display device is not limited to the traditional rectangle, but can be an arc screen, a bang screen and other special-shaped display screens. Moreover, in order to meet different application scenarios, the standards of the optical characteristic parameters of the display device are different, for example, the positions where the optical characteristic parameters are collected may be different. Therefore, the combination of any two regions on the display panel can be set according to practical situations, and the setting mode of the combination of any two regions includes but is not limited to: taking two first areas as a combination; at least two first areas and one first area are taken as a combination; at least two first regions and at least two first regions are one combination.

Fig. 4 to 6 respectively show schematic diagrams of three region combinations.

Fig. 4 is a schematic diagram of two first areas as a combination, and according to the selection of the set position relationship, possible combinations include, but are not limited to: (1, 2), (1, 7), (1, 8), (1, 10), (1, 9).

Fig. 5 is a schematic diagram of at least two first areas and one first area as a combination, and according to the selection of the set position relationship, possible combinations include, but are not limited to: (1, 2), (1, 7), (2, 3), (2, 8).

Fig. 6 is a schematic diagram of at least two first areas and at least two first areas as a combination, and according to the selection of the set position relationship, possible combinations include, but are not limited to: (1, 2), (1, 6), (2, 3), (2, 7), (3, 4), (3, 7), (3, 8), (4, 5), (4, 8).

In one embodiment, the two regions on the display panel satisfying the set positional relationship include a second region and a third region; the second area represents a first area where a center point of the display panel is located; the third area represents any first area on the display panel except the second area;

the adjusting the first parameter corresponding to each backlight partition of the at least one backlight partition comprises:

And under the condition that whether the obtained first set meets the set conditions or not is judged, second parameters of the second area and the third area are compared based on the determined first set to obtain a corresponding first difference, and according to the size relation of the second area and the third area, the first parameters of the backlight subarea corresponding to the third area are adjusted based on the corresponding first difference, namely, the second parameters of the second area are kept, and the second parameters of the third area are adjusted, so that the optical characteristic parameters expressed by each point of the display device are uniform. Here, the second region represents a first region in which a center point of the display panel is located, and the third region represents any one of the first regions on the display panel except for the second region. The first difference represents an absolute value of a difference between a second parameter of the second region and a second parameter of the third region, and the first difference can be obtained by subtracting the second parameter of the region with the smaller second parameter from the second parameter of the region with the larger second parameter of the two regions.

A second threshold value may also be set as a condition for adjusting the third area, the second threshold value representing a maximum acceptable difference between the optical characteristic parameter of the third area and the optical characteristic parameter of the second area when optically compensating the display device. In practical applications, the second threshold may be set to 0, that is, the first parameter corresponding to the backlight partition corresponding to the third area is adjusted when the second parameters of the second area and the third area are not equal.

Before the determination of the set condition, the first area where the central point is located may be determined as the second area, and all the first areas except the second area are the third area. As shown in the schematic diagram of the display panel area shown in fig. 8, the first area E is a second area, and the first area a, the first area B, the first area C, the first area D, the first area F, the first area G, the first area H and the first area J are third areas. Here, each first region corresponds to at least one backlight partition, and the backlight partition corresponding to each first region is usually complete when each first region is determined, so that after the first parameter of the backlight region corresponding to the third region is adjusted at least once, the optical characteristic parameters of each point of the display device are uniform, thereby improving the display quality of the display device when displaying a picture.

Due to the influence of the panel process and other factors, for example, in the film formation step such as Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD), the edge and the center are inevitably different in film thickness and film quality, so that the optical performance of the whole display panel is not completely uniform. In an embodiment, the adjusting the first parameter of the backlight partition corresponding to the third area includes:

under the condition that the second parameter of the third area is larger than the second parameter of the second area, multiplying the first parameter of the backlight subarea corresponding to the third area by a second coefficient; the second coefficient is less than 1.

Here, when the first parameter of the backlight partition corresponding to the third area is adjusted, the first coefficient or the second coefficient is determined according to the first difference.

In practical application, the second parameter of each third region is compared with the second parameter of the second region.

In the case where the second parameter of the third area is smaller than the second parameter of the second area, the first coefficient α is determined by the following formula 1:

α＝1+1.05*|L _A -L _E |/L _E (1)

wherein, the first and the second end of the pipe are connected with each other,

L _E a second parameter characterizing the second region; l is a radical of an alcohol _A Characterizing a third regionThe second parameter of (1).

In the case where the second parameter of the third region is greater than the second parameter of the second region, the second coefficient β is determined by the following equation 2:

β＝1-1.05*|L _A -L _E |/L _E (2)

updating the first parameter E of the backlight partition corresponding to the third area based on the determined first parameter or second parameter through the following formula 3 _A ：

E _peak characterizing peak circuit characteristic parameters, wherein the peak circuit characteristic parameters represent corresponding backlight partition maximum input circuit characteristic parameters; e' _A And a first parameter representing the backlight partition corresponding to the third area before updating is generally a 70% peak circuit characteristic parameter value.

Typically the center region will be optically more optimal than the edge regions. When optical compensation is carried out, the optical parameters of the area where the central point is located are kept, the optical parameters of the peripheral area are adjusted, and the whole-surface optical performance of the adjusted display device is better, so that a better display effect is obtained.

In one embodiment, two regions on the display panel satisfying the set positional relationship are characterized as two laterally adjacent first regions or two longitudinally adjacent first regions.

Here, when determining whether the obtained first set satisfies the setting condition, the corresponding second parameters of two laterally adjacent first regions or two longitudinally adjacent first regions on the display panel are compared based on the determined first set to obtain a corresponding first difference value, and whether the obtained first difference value is greater than a first threshold value is determined, so as to adjust the first parameter corresponding to at least one backlight partition. When the comparison of the second parameters corresponding to the first areas satisfying the set position relationship is performed, the comparison includes, but is not limited to, only comparing two transversely adjacent first areas or only comparing two longitudinally adjacent first areas, or may be a combination of the two, that is, after the transversely adjacent first areas are compared, the longitudinally adjacent first areas are compared; in addition, it is also possible to further set up a comparison between the first areas in other positional relationships, such as two areas of the same color in the checkerboard shown in fig. 7. In this way, the optical characteristics of the continuous area of the display device are smoothly transited, thereby improving the display quality of the display device when displaying a picture.

In practical applications, taking the schematic diagram of the display panel area shown in fig. 8 as an example, the horizontal comparison is performed in the order of (a, B), (B, C), (D, E), (E, F), (G, H), and (H, J), and then the vertical comparison is performed in the order of (a, D), (D, G), (B, E), (E, H), (C, F), and (F, J). In this way, the optical characteristics of the whole continuous area of the adjusted display device are smoothly transited, thereby improving the display quality of the display device when displaying a picture.

In an embodiment, the adjusting the first parameter corresponding to each backlight partition of the at least one backlight partition includes:

under the condition that the corresponding first difference value is larger than the second difference value, adjusting a first parameter of a backlight partition corresponding to each of the two first areas meeting the set position relationship;

the second difference represents the difference of the third parameters of the two first areas meeting the set position relationship; the third parameter characterizes the second parameter when no optical compensation is performed.

Here, the second difference value may be determined based on the corresponding first set recorded in the storage medium without optical compensation.

Before the magnitude relation between the first difference and the second difference is judged, the first difference and the two first areas can be usedThe ratio of the second parameter with smaller domain, the ratio of the difference value and the set ratio threshold value T are determined ₁ And comparing, and comparing the first difference value with the second difference value under the condition that the difference value proportion is greater than the proportion threshold value. In this way, the ratio threshold is used as a condition for whether to adjust the first parameters of the backlight partitions corresponding to the two first areas, and when the ratio difference after the adjustment of the first parameters is greater than the ratio threshold, the adjustment of the first parameters of at least one backlight partition is repeated until the determined ratio of the difference is less than the ratio threshold. In practical application, the proportional threshold T ₁ May be set to 5%. In this way, whether the first parameter of at least one backlight subarea corresponding to the two first areas is adjusted or not is judged by setting the proportion threshold value, and the optical performance of each point of the adjusted display device can be controlled.

And adjusting the first parameter corresponding to at least one backlight subarea by comparing the difference value of the second parameters of the two first areas before and after optical compensation, namely comparing the current first difference value with the second difference value when optical compensation is not carried out.

In the case where the first difference is larger than the second difference, each of the two first regions satisfying the set positional relationship is adjusted based on the first parameter when optical compensation is not performed, that is, the first parameter value of each of the two first regions is restored to the first parameter value when optical compensation is not performed.

And under the condition that the first difference is not larger than the second difference, adjusting a first parameter of the backlight partition corresponding to the first area determined based on the setting rule in the two first areas according to the first difference. Here, the manner of determining the fourth region based on the setting rule includes, but is not limited to, determining one first region having a larger coordinate in the setting coordinate axis as the fourth region, and determining one first region that is next to the other when two first regions are compared two by two as the fourth region. Taking fig. 8 as an example, when the horizontal comparisons are performed in the order of (a, B), (B, C), the first region C is one first region that is one first region in the order of the region comparisons.

In practical applications, the third coefficient γ is determined by the following equation 4:

γ＝1+0.5*|L _C -L _D | (4)

wherein the content of the first and second substances,

L _C a second parameter characterizing the fourth region; l is _D A second parameter characterizing a fifth region, i.e. the other of the two first regions than the fourth region.

And multiplying the first parameter of the backlight subarea corresponding to the fourth area by a third coefficient gamma when the second parameter of the fourth area is smaller than the second parameter of the fifth area. And dividing the first parameter of the backlight subarea corresponding to the fourth area by the third coefficient gamma when the second parameter of the fourth area is larger than the second parameter of the fifth area.

In an embodiment, the number of the backlight partitions in the backlight module is greater than or equal to 200.

Here, the larger the number of backlight partitions of the backlight module is, the more uniform the optical characteristic parameters expressed by each point of the display device after optical compensation are. When the number of the backlight subareas is 200 or more, the optical characteristic parameters expressed by each point of the display device obtained by optical compensation are uniform, so that the display quality of the display device in displaying a picture is improved.

In an embodiment, the method further comprises:

after the adjusted first set meets the set condition, storing the first parameter and the fourth parameter corresponding to each backlight partition after adjustment in an associated manner; wherein the content of the first and second substances,

Here, the fourth parameter represents a set circuit characteristic parameter input to the display panel, and may be a current parameter and/or a voltage parameter. Based on different circuit characteristic parameters of the input display panel, the display device can display different gray-scale pictures. In the optical compensation, the set circuit characteristic parameters are input to the display panel, so that the display device displays a gray-scale picture corresponding to the optical characteristic, and the optical compensation is performed on the gray-scale picture, that is, the embodiment of the present application performs the optical compensation in a state where the display device displays the gray-scale picture. The gray-scale frames include, but are not limited to, red frames, green frames, blue frames, and white frames.

And when the fourth parameter is input into the display panel, the display device is optically adjusted, and after the adjusted first set meets the set condition, the first parameter corresponding to each backlight partition after adjustment and the fourth parameter are stored in an associated manner. And repeating the steps, and storing the incidence relation between at least one fourth parameter and the adjusted first parameter corresponding to each backlight partition in the display device. When the display device displays an image picture, the display device is optically compensated by using the first parameters corresponding to each backlight subarea stored in an associated manner based on the fourth parameters of different areas of the display panel, specifically, the associated first parameters are input to the corresponding backlight subareas according to the fourth parameters of each first area in the display panel, and the display device is optically compensated, so that the display quality of the display device is improved.

In practical applications, for a common display device, such as a television, a computer display screen, etc., 256-bit gray levels are usually adopted, and a gray level picture in which 4 gray levels, namely 63 gray levels, 127 gray levels, 191 gray levels, and 255 gray levels, are displayed on a display panel is taken as an example to perform optical compensation and adjust input circuit characteristic parameters of the display panel.

In the scheme provided by the embodiment of the invention, based on the circuit characteristic parameter corresponding to each backlight subarea in the backlight module of the display device, the set of the optical characteristic parameters of the first area corresponding to each backlight subarea on the display panel is determined to be the first set, and the circuit characteristic parameters of each backlight subarea in at least one backlight subarea are adjusted under the condition that the determined first set does not meet the set condition, and the steps are repeated until the obtained first set meets the set condition.

With the development of the backlight module technology, besides the conventional backlight module using a Light bar or a lamp tube as a Light source, a sub-millimeter Light Emitting Diode MiniLED, a micro Light Emitting Diode, an Organic Light-Emitting Diode (OLED), or a Quantum Dot Light Emitting Diode (QLED) may be used as the backlight module of the Light source. LED lamp pearl point interval of MiniLED backlight unit is less, and LED quantity is more in the unit area, light source unit size is littleer, can support more accurate regional dimming to the display quality of the picture that can promote when showing the picture. By taking the miniLED backlight module as an example, the LED lamp bead point interval of the miniLED backlight module is smaller, the number of LEDs in a unit area is larger, the unit size of a light source is smaller, the backlight module can support more partitions when carrying out regional dimming, and more accurate regional dimming is realized, so that the display quality of a picture can be improved when the picture is displayed.

As an embodiment of the application of the present invention, taking the implementation flow diagram of the brightness compensation method shown in fig. 9 as an example, the method includes the following steps:

step 901: and numbering each backlight partition of each MiniLED backlight module.

Backlight partition of MiniLED backlight module according to B ₁ 、B ₂ 、B ₃ 、B ₄ 823060 \ 823080:, numbering is carried out, and the backlight subarea where the central point of the backlight module is positioned is marked as B _E 。

Here, a MiniLED backlight module is provided, which has a nine-point backlight uniformity of > 70%, and needs to have a Local Dimming function. When the quantity of subregion in a poor light is more than 200 districts, the optical compensation effect is better, and MiniLED subregion is more, realizes accurate correspondence and accurate accuse district more easily. The MiniLED backlight module-based LCD device has a Mura region with non-uniform brightness and a normal region.

Step 902: the display panel of the LCD device is partitioned according to the backlight partition.

The first region of the display panel is as follows ₁ 、A ₂ 、A ₃ 、A ₄ 82303080 numbering is carried out, wherein the first region where the center point of the display panel is located is marked with A _E 。

And according to the position and the size corresponding to the backlight subarea of the MiniLED backlight module, carrying out subarea numbering on the display area of the display panel of the LCD device. Specifically, the display areas of the display panel are divided according to the backlight partitions of the MiniLED backlight module, first areas of the display panel corresponding to the backlight partitions one by one are obtained, and numbering is performed. And if the first area of the edge position of the display panel cannot be completely equal to that of the MiniLED backlight subarea, determining the position corresponding to the boundary line in the coordinate system established by referring to the central point.

Step 903: and determining brightness matrix data corresponding to each first area of the display panel.

Firstly, each backlight subarea in the MiniLED backlight module is powered up according to 70% of peak current, the backlight module is lightened, a display panel displays a 255-gray-scale picture, and instruments such as a CCD (charge coupled device), a spectrometer and the like are used for collecting and recording current first areas A ₁ 、A ₂ 、A ₃ 、A ₄ Luminance data L of ₁ 、L ₂ 、L ₃ 、L ₄ 823060, and central brightness L _E ) And obtaining brightness matrix data corresponding to each first area of the display panel.

The central brightness of the area E shown in fig. 8 is collected and recorded, the area E is the area of the display panel corresponding to the MiniLED backlight partition closest to the screen center point in the MiniLED backlight partition, and the current of the MiniLED backlight partition corresponding to the area E is also 70% of the peak current).

Step 904: and comparing the brightness value of each first area with that of the central point area, and adjusting the corresponding backlight partition current.

Here, the first regions L are compared, respectively ₁ 、L ₂ 、L ₃ 、L ₄ 823080, and brightness value L of central point E region _E With L _A Representing the brightness value of a certain area, and updating the current E of the backlight subarea of the MiniLED backlight module corresponding to the third area according to formula 1, formula 2 and formula 3 _A And recording corresponding data, and sequentially adjusting the current of the MiniLED backlight subarea corresponding to each first area by the method, wherein if alpha is E' _A ≥E _peak That is, if the adjustment calculation result of the current of the MiniLED backlight partition is greater than the peak current, the corresponding backlight is inputThe current value of the zone is the maximum value of the current, namely the peak current.

Adjusting the input current of each backlight partition, displaying the gray scale picture on the display panel, testing the current brightness value by an instrument and recording the data as T ₁ 、T ₂ 、T ₃ 、T ₄ 8230the brightness value comparison of the first area is carried out according to the adjacent position relation of the data obtained by the test.

Here, the comparison and adjustment in the horizontal sequence may be performed first, and then the comparison and adjustment in the vertical sequence may be performed, and the adjustment may be stopped until all brightness differences to be compared are less than 5%. If the brightness difference is within 5%, then do not adjust again, if the brightness difference is more than 5%, then adjust the brightness data T of two areas _X 、T _Y Luminance value and L of the corresponding partition of the first test _X 、L _Y And (6) comparing. The luminance difference value is obtained by dividing the difference value between the luminance values of the two regions by the luminance value of the region having the smaller luminance value of the two regions.

If T _X -T _Y |＜|L _X -L _Y If, then adjust T by calculating coefficient γ according to equation 4 _Y Current value of (1), marked as T _Y1 Comparing again, if the brightness difference is larger than 5%, calculating the coefficient again according to the formula 4 to adjust T _Y1 Until the luminance difference is less than 5%. Here, T _Y And representing the next region when the two regions are compared pairwise.

If T _X -T _Y |>|L _X -L _Y If so, then T _X 、T _Y Is adjusted to L _X 、L _Y Current value of (1), marked as T _LX1 、T _LY1 And comparing again, and if the brightness difference is larger than 5%, continuing to adjust in the manner until the difference is smaller than 5%.

As shown in fig. 8, in the comparison adjustment in the horizontal sequence or the vertical sequence, the area E where the central point is located and the area a are compared, the brightness value of the area a is adjusted, and then the comparison adjustment in the horizontal sequence or the vertical sequence is performed.

Step 905: and adjusting the current or voltage input into the display panel to obtain optical adjustment results under different gray scales.

After the 256-bit gray scale picture is adjusted, the current or voltage input into the display panel is adjusted, and the adjustment is carried out on 10%, 20%, 30%, 8230of the 256-bit gray scale picture, 8230and 90% of the 256-bit gray scale picture, and the relevant adjustment result is stored.

Step 906: and adjusting the current of each backlight subarea of the display device.

After the backlight partition current under each gray scale picture is adjusted, the maximum current of the central point is set according to 70% of the peak current, and the current values of other backlight partitions are adjusted according to the gray scale value of the picture.

The application embodiment provides a method for performing brightness compensation on a Mura region in a display device based on a MiniLED backlight module, which comprises the steps of adjusting the current of each backlight partition through the brightness of a central point and the display panel region corresponding to each backlight partition, sequentially comparing the brightness of each corresponding display panel region with the brightness of an adjacent display panel region, and adjusting the input current of the backlight partition, so that the ideal brightness of the selected partition brightness point is obtained, and the optical compensation on the region is completed. The brightness difference of the areas of the display panels after compensation is small, and the brightness difference between the Mura area and the normal area can be compensated, so that smooth transition is realized, and the display quality of the MiniLED backlight liquid crystal television is improved.

To implement the method of the embodiment of the present application, the embodiment of the present application further provides an optical compensation apparatus, as shown in fig. 10, including:

the testing unit 1001 is used for determining a first set based on a first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight partition; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region characterizes a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area;

an adjusting unit 1002, configured to adjust a first parameter corresponding to each backlight partition in at least one backlight partition when the first set does not satisfy a setting condition, until the adjusted first set satisfies the setting condition.

Wherein, in one embodiment, the set condition indicates that all the first difference values are smaller than the first threshold value; the first difference value represents the difference value of the second parameters corresponding to two areas meeting the set position relation on the display panel.

In one embodiment, the two regions satisfying the set positional relationship on the display panel include a second region and a third region; the second area represents a first area where a center point of the display panel is located; the third area represents any first area on the display panel except the second area; the adjusting unit 1002 is configured to:

In an embodiment, the adjusting unit 1002 is configured to:

In one embodiment, the number of backlight partitions in the backlight module is greater than or equal to 200.

In one embodiment, the optical compensation apparatus further includes:

the storage unit is used for storing the first parameter and the fourth parameter which correspond to each backlight partition after the adjusted first set meets the set condition in an associated manner; wherein the fourth parameter characterizes a set circuit characteristic parameter input to the display panel.

In practical applications, the test Unit 1001, the adjusting Unit 1002, and the storage Unit may be implemented by a Processor in an optical compensation device, such as a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a Micro Control Unit (MCU), or a Programmable Gate Array (FPGA).

It should be noted that: in the optical compensation device provided in the above embodiment, only the division of the program modules is exemplified when performing optical compensation, and in practical applications, the above processing may be distributed to different program modules according to needs, that is, the internal structure of the device may be divided into different program modules to complete all or part of the above-described processing. In addition, the optical compensation device and the optical compensation method provided by the above embodiments belong to the same concept, and specific implementation processes thereof are described in the method embodiments and are not described herein again.

Based on the hardware implementation of the program module, in order to implement the method of the embodiment of the present application, an embodiment of the present application further provides an electronic device. Fig. 11 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present application, and as shown in fig. 11, the electronic device includes:

a communication interface 1 capable of information interaction with other devices such as network devices and the like;

and the processor 2 is connected with the communication interface 1 to realize information interaction with other equipment, and is used for executing the optical compensation method provided by one or more technical schemes when running a computer program. And the computer program is stored on the memory 3.

In practice, of course, the various components in the electronic device are coupled together by means of the bus system 4. It will be appreciated that the bus system 4 is used to enable the communication of connections between these components. The bus system 4 comprises, in addition to a data bus, a power bus, a control bus and a status signal bus. But for the sake of clarity the various buses are labeled as bus system 4 in figure 11.

The memory 3 in the embodiment of the present invention is used to store various types of data to support the operation of the electronic device. Examples of such data include: any computer program for operating on an electronic device.

It will be appreciated that the memory 3 may be either volatile memory or nonvolatile memory, and may include both volatile and nonvolatile memory. Among them, the nonvolatile Memory may be a Read Only Memory (ROM), a Programmable Read Only Memory (PROM), an Erasable Programmable Read-Only Memory (EPROM), an Electrically Erasable Programmable Read-Only Memory (EEPROM), a magnetic random access Memory (FRAM), a Flash Memory (Flash Memory), a magnetic surface Memory, an optical Disc, or a Compact Disc Read-Only Memory (CD-ROM); the magnetic surface storage may be disk storage or tape storage. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), synchronous Static Random Access Memory (SSRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), enhanced Synchronous Dynamic Random Access Memory (Enhanced DRAM), synchronous Dynamic Random Access Memory (SLDRAM), direct Memory (DRmb Access), and Random Access Memory (DRAM). The memory 2 described in the embodiments of the present invention is intended to comprise, without being limited to, these and any other suitable types of memory.

The method disclosed by the above embodiment of the present invention can be applied to the processor 2, or implemented by the processor 2. The processor 2 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware integrated logic circuits or software in the processor 2. The processor 2 described above may be a general purpose processor, a DSP, or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The processor 2 may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the method disclosed by the embodiment of the invention can be directly implemented by a hardware decoding processor, or can be implemented by combining hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in the memory 3, and the processor 2 reads the program in the memory 3 and in combination with its hardware performs the steps of the aforementioned method.

When the processor 2 executes the program, the corresponding processes in the methods according to the embodiments of the present invention are realized, and for brevity, are not described herein again.

In an exemplary embodiment, the present invention further provides a storage medium, i.e., a computer storage medium, specifically a computer readable storage medium, for example, including a memory 3 storing a computer program, where the computer program is executable by a processor 2 to perform the steps of the foregoing method. The computer readable storage medium may be Memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus, terminal and method may be implemented in other manners. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, all the functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in the form of hardware, or in the form of hardware plus a software functional unit.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

Alternatively, the integrated unit of the present invention may be stored in a computer-readable storage medium if it is implemented in the form of a software functional module and sold or used as a separate product. Based on such understanding, the technical solutions of the embodiments of the present invention may be essentially implemented or a part contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling an electronic device (which may be a personal computer, a server, or a network device) to execute all or part of the methods described in the embodiments of the present invention. And the aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic or optical disk, or various other media that can store program code.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An optical compensation method, comprising:

determining a first set based on a first parameter corresponding to each backlight partition in a backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight partition; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region characterizes a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area;

2. The method of claim 1, wherein the set condition is characterized by all of the first difference values being less than a first threshold value; the first difference value represents the difference value of second parameters corresponding to two areas meeting the set position relation on the display panel.

3. The method according to claim 2, wherein the two regions satisfying the set positional relationship on the display panel include a second region and a third region; the second area represents a first area where a central point of the display panel is located; the third area represents any first area on the display panel except the second area;

4. The method of claim 3, wherein the adjusting the first parameter of the backlight partition corresponding to the third area comprises:

5. The method according to claim 2, wherein two regions satisfying the set positional relationship on the display panel are characterized as two laterally adjacent first regions or two longitudinally adjacent first regions.

6. The method of claim 5, wherein the adjusting the first parameter corresponding to each of the at least one backlight partition comprises:

under the condition that the corresponding first difference value is not larger than the second difference value, adjusting a first parameter of a backlight partition corresponding to the fourth area according to the first difference value; the fourth area characterizes a first area determined based on a set rule among two first areas satisfying a set positional relationship;

7. The method of claim 1, wherein the number of backlight partitions in the backlight module is greater than or equal to 200.

8. The method of claim 1, further comprising:

after the adjusted first set meets the set condition, storing the first parameter and the fourth parameter corresponding to each backlight partition after adjustment in an associated manner; wherein, the first and the second end of the pipe are connected with each other,

9. An optical compensation device, comprising:

the testing unit is used for determining a first set based on a first parameter corresponding to each backlight partition in the backlight module of the display device; the first parameter represents and inputs the circuit characteristic parameter of the corresponding backlight partition; the first set represents a set of second parameters of a first area corresponding to each backlight partition; the first region characterizes a corresponding region on a display panel of the display device; the second parameter is used for characterizing the optical characteristic parameter of the corresponding first area;

10. An electronic device, comprising: a processor and a memory for storing a computer program capable of running on the processor,

wherein the processor is configured to execute the steps of the optical compensation method according to any one of claims 1 to 8 when running the computer program.

11. A storage medium on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the optical compensation method of any one of claims 1 to 8.