CN106847192B - Local backlight brightness adjusting method and system and display device - Google Patents
Local backlight brightness adjusting method and system and display device Download PDFInfo
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- CN106847192B CN106847192B CN201710067217.8A CN201710067217A CN106847192B CN 106847192 B CN106847192 B CN 106847192B CN 201710067217 A CN201710067217 A CN 201710067217A CN 106847192 B CN106847192 B CN 106847192B
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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
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
Abstract
The invention discloses a method for adjusting local backlight brightness, an adjusting system and a display device thereof, wherein the adjusting method comprises the following steps: dividing a pixel area corresponding to each backlight subarea in the backlight source into a plurality of sub subareas, and acquiring the maximum value of the pixel gray scale of each sub subarea; sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small; and selecting the maximum value of the pixel gray scale except the first serial number according to the maximum value of the pixel gray scale of each ordered sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition. According to the invention, the selected maximum value of the pixel gray scale except the first serial number is used for determining the adjusting signal, so that backlight brightness mutation caused by movement of tiny bright blocks such as a mouse can be effectively avoided, visual impact on human eyes caused by local backlight brightness mutation is further effectively avoided, and the use experience of a user is remarkably improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and a system for adjusting local backlight brightness, and a display device.
Background
At present, more and more Liquid Crystal Displays (LCDs) use a backlight technology of Light Emitting Diodes (LEDs), which has the advantages of long service life, power saving, energy saving, and convenient driving.
Generally, an LED may be driven by a Local Dimming technique, and specifically, the Local backlight adjusting method divides an LED backlight source into a plurality of LED backlight partitions, performs overall statistics on pixel gray scales corresponding to the LED backlight partitions, for example, if a pixel gray scale value corresponding to an LED backlight partition is 255, a maximum value of the gray scale of the area statistics is 255 no matter the gray scale values of other pixels, and further determines the maximum value of the backlight luminance of the area, so that the maximum value of the area statistics is significantly increased when a tiny bright block enters a dark area due to statistics on the maximum value in the backlight partition luminance statistics, thereby generating a Local backlight luminance sudden change phenomenon and causing impact to human eyes. Taking fig. 1 as an example, when the mouse enters a darker area, the backlight brightness of the area is obviously changed suddenly.
Therefore, it is an urgent technical problem to be solved by those skilled in the art how to avoid the local backlight brightness abrupt change caused by the movement of the tiny bright block such as the mouse movement.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method, a system and a display device for adjusting local backlight brightness, which can effectively avoid sudden changes in backlight brightness caused by movement of small bright blocks such as mouse movement, and further effectively avoid visual impact on human eyes caused by sudden changes in local backlight brightness.
Therefore, an embodiment of the present invention provides a method for adjusting local backlight brightness, including:
dividing a pixel area corresponding to each backlight partition in a backlight source into a plurality of sub-partitions, and acquiring the maximum value of the pixel gray scale of each sub-partition; the maximum pixel gray scale value is the maximum value of the gray scale values of all the pixel points in each sub-partition;
sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small;
and selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition.
In a possible implementation manner, in the method for adjusting local backlight luminance provided in an embodiment of the present invention, selecting a maximum gray scale value of a pixel excluding a first sequence number to determine an adjustment signal specifically includes:
neglecting the maximum value of the gray scale of the pixels arranged in the first N serial numbers, and selecting the gray scale value of the pixels arranged in the (N + 1) th serial number to determine an adjusting signal; wherein N is more than or equal to 1 and less than or equal to M, and M is the number of the sub-partitions.
In a possible implementation manner, in the method for adjusting local backlight luminance provided by the embodiment of the present invention, a pixel area corresponding to each backlight partition in a backlight source is divided into 16 sub-partitions whose arrangement structure is 4 × 4 arrangement.
In a possible implementation manner, in the method for adjusting local backlight brightness provided by the embodiment of the present invention, each backlight partition includes at least one light emitting diode.
The embodiment of the present invention further provides an adjusting system using the method for adjusting local backlight brightness, including: an acquisition unit, a sorting unit and a selection unit,
the acquisition unit is used for dividing a pixel area corresponding to each backlight partition in the backlight source into a plurality of sub-partitions and acquiring the maximum value of the pixel gray scale of each sub-partition; the maximum pixel gray scale value is the maximum value of the gray scale values of all the pixel points in each sub-partition;
the sorting unit is used for sorting the obtained maximum pixel gray scale values of the sub-partitions from large to small;
and the selecting unit is used for selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition.
In a possible implementation manner, in the system for adjusting local backlight luminance provided in the embodiment of the present invention, the selecting unit is specifically configured to ignore the maximum gray scale values of the pixels in the first N serial numbers according to the maximum gray scale value of the pixels in each of the sorted sub-partitions and the number of the sub-partitions, and select the gray scale value of the pixel in the N +1 th serial number to determine an adjustment signal, so as to adjust the backlight luminance of the backlight partition; wherein N is more than or equal to 1 and less than or equal to M, and M is the number of the sub-partitions.
The embodiment of the invention also provides a display device which comprises the local backlight brightness adjusting system provided by the embodiment of the invention.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a method for adjusting local backlight brightness, an adjusting system and a display device thereof, wherein the adjusting method comprises the following steps: dividing a pixel area corresponding to each backlight subarea in the backlight source into a plurality of sub subareas, and acquiring the maximum value of the pixel gray scale of each sub subarea; sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small; and selecting the maximum value of the pixel gray scale except the first serial number according to the maximum value of the pixel gray scale of each ordered sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition. According to the invention, the adjustment signal is determined by selecting the maximum value of the pixel gray scale except the first serial number, so that backlight brightness mutation caused by movement of a small bright block such as a mouse can be effectively avoided, visual impact on human eyes caused by local backlight brightness mutation is further effectively avoided, and the use experience of a user is remarkably improved.
Drawings
FIG. 1 is a diagram illustrating a local backlight brightness jump caused by a mouse movement in the prior art;
fig. 2 is a flowchart of a method for adjusting local backlight brightness according to an embodiment of the present invention;
fig. 3 is a schematic diagram of 20 pixel regions corresponding to backlight partitions in a backlight source, the arrangement structure of which is 5 × 4 according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the 1 pixel region in FIG. 3 divided into 16 sub-partitions with 4 × 4 arrangement structure when the mouse enters;
FIG. 5 is a schematic diagram of the 1 pixel region in FIG. 3 divided into 16 sub-partitions with 4 × 4 arrangement structure when the mouse is not in;
fig. 6 is a schematic diagram illustrating that the local backlight brightness is not changed when the mouse moves according to the embodiment of the present invention.
Detailed Description
The following describes in detail specific embodiments of a method for adjusting local backlight brightness, an adjustment system thereof, and a display device according to an embodiment of the present invention with reference to the accompanying drawings.
An embodiment of the present invention provides a method for adjusting local backlight brightness, as shown in fig. 2, including: the method comprises the following steps:
s201, dividing a pixel area corresponding to each backlight subarea in a backlight source into a plurality of sub subareas, and acquiring the maximum value of the pixel gray scale of each sub subarea; the maximum value of the pixel gray scale is the maximum value of the gray scale values of all the pixel points in each sub-partition;
s202, sequencing the acquired maximum pixel gray scale values of the sub-partitions from large to small;
s203, selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition.
The method for adjusting the local backlight brightness provided by the embodiment of the invention comprises the following steps: dividing a pixel area corresponding to each backlight subarea in the backlight source into a plurality of sub subareas, and acquiring the maximum value of the pixel gray scale of each sub subarea; sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small; and selecting the maximum value of the pixel gray scale except the first serial number according to the maximum value of the pixel gray scale of each ordered sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition. According to the invention, the adjustment signal is determined by selecting the maximum value of the pixel gray scale except the first serial number, so that backlight brightness mutation caused by movement of a small bright block such as a mouse can be effectively avoided, visual impact on human eyes caused by local backlight brightness mutation is further effectively avoided, and the use experience of a user is remarkably improved.
Specifically, in a specific implementation, in the method for adjusting local backlight luminance provided by the embodiment of the present invention, taking fig. 3 as an example, an arrangement structure of pixel regions corresponding to backlight partitions in a backlight source may be a 5 × 4 arrangement, that is, it may be understood that the entire backlight source may be divided into backlight partitions of the 5 × 4 arrangement, where the backlight partitions are determined by actual arrangement of backlight LED lamps, each backlight partition may include at least one LED lamp, and each square in fig. 3 represents a pixel region corresponding to one backlight partition; taking fig. 4 as an example, fig. 4 is a refinement of a single partition (i.e. at the dashed frame in fig. 3) in the second row and the first column in the 5 × 4 arrangement, i.e. fig. 4 only represents one small square in fig. 3, representing a pixel region corresponding to one backlight partition, which can be implemented internally by a Timing Controller (TCON), and preferably, as shown in fig. 4, the pixel region corresponding to each backlight partition can be subdivided into 16 sub-partitions arranged in the 4 × 4 arrangement.
It should be noted that, there are many arrangement structures of the pixel regions corresponding to the backlight partitions in the backlight source, and the arrangement structures are not limited to the 5 × 4 arrangement structures referred to in the drawings, and may be determined according to actual situations, and are not limited herein; the subdivision of the pixel region corresponding to each backlight partition may be performed in various ways, and is not limited to the 4 × 4 arrangement structure shown in the drawings, and may be performed in accordance with actual circumstances, and is not limited herein.
Further, in a specific implementation, in the method for adjusting local backlight luminance provided by the embodiment of the present invention, after the obtained maximum pixel gray levels of the sub-partitions are sorted from large to small, the maximum pixel gray level is selected in the following manner to determine the adjustment signal:
ignoring the maximum value of the gray scale of the pixels arranged in the first N serial numbers (namely an N maximum value ignoring mechanism), and selecting the gray scale value of the pixels arranged in the (N + 1) th serial number to determine an adjusting signal; wherein the parameter N is a positive integer.
It should be noted that the above steps may be summarized as "N maximum value ignoring mechanisms", the configuration of the parameter N may be implemented by the timing controller TCON, the parameter N is not limited to 1, and may also be 2, 3, 4, 5 or other conditions, and specifically may be determined according to how many sub-partitions each backlight partition is subdivided, and the relative size of the tiny light blocks, and the like.
Specifically, taking fig. 4 to fig. 6 as an example, step S202 and step S203 in the above method for adjusting local backlight luminance according to the embodiment of the present invention are illustrated:
fig. 4 shows the situation that the mouse has entered the sub-partitions, and assuming that the maximum value of the pixel gray scale of the circular area is 127 and the maximum value of the pixel gray scale of the small bright block of the mouse is 255, the maximum values of the pixel gray scales of the sub-partitions are sorted from large to small, and it can be seen that the maximum values of the pixel gray scales of the 16 sub-partitions arranged by 4 × 4 are counted as follows: {255, 127, 127, 127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, if there are no N maximum value ignore mechanisms, then the brightness of the entire backlight partition will light up as L255;
fig. 5 shows a situation that the mouse does not enter the sub-partitions, each sub-partition has no bright block with a maximum pixel gray scale value of 255, and the maximum pixel gray scales of the sub-partitions are sorted from large to small, which shows that the maximum pixel gray scales of 16 sub-partitions arranged by 4 × 4 are counted as follows: {127, 127, 0, 0, 0, 0, 0, 0, 0}, if there are no N maximum value ignore mechanisms, then the brightness of the entire backlight partition is lit at L127;
it can be seen that when a small bright block such as a mouse suddenly enters the partition, the backlight brightness of the partition is suddenly changed from L127 to L255, and the whole partition suddenly becomes bright visually, so that the maximum value of the pixel gray scale of the corresponding area is changed when the small bright block such as the mouse moves, and the visual impact on human eyes is caused by the sudden change of the local backlight brightness;
in the method for adjusting local backlight brightness according to the embodiment of the present invention, N maximum value ignoring mechanisms are introduced, which is still developed by the above example, and it is assumed that the parameter N is set to 1, that is, the maximum value of the gray scale of the pixel arranged at the first serial number is ignored;
as shown in fig. 4, when the mouse has entered into the sub-partitions, it is known that the maximum value of the pixel gray scale of the circular area is 127, and the maximum value of the pixel gray scale of the small bright block of the mouse is 255, then the maximum values of the pixel gray scales of the sub-partitions are sorted from large to small, and it can be seen that the maximum values of the pixel gray scales of 16 sub-partitions arranged by 4 × 4 are counted as follows: {255, 127, 127, 127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, since the maximum value of the gray scale of the pixel arranged at the first index is ignored, 255 arranged at the first index is ignored, and the brightness of the entire backlight section is lit at L127;
as shown in fig. 5, when the mouse does not enter the sub-partitions, the maximum pixel gray scale values of the sub-partitions are sorted from large to small, and it can be seen that the maximum pixel gray scale values of 16 sub-partitions arranged by 4 × 4 are counted as follows: {127, 127, 127, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}, since the maximum value of the gray scale of the pixel arranged at the first index is also ignored, the pixel arranged at the first index is omitted 127, but two pixels 127 are still present, and the luminance of the entire backlight section is lit up as L127;
it can be seen that, when a small bright block such as a mouse suddenly enters a sub-partition, as shown in fig. 6, the backlight brightness of the backlight partition remains unchanged, and does not suddenly brighten in vision, so that the change of the maximum gray scale value of the corresponding area caused by the movement of the small bright block such as the mouse can be ignored, and thus, the visual impact on human eyes caused by the sudden change of local backlight brightness is avoided.
Based on the same inventive concept, the embodiment of the present invention further provides an adjusting system using the method for adjusting local backlight brightness provided by the embodiment of the present invention, and because the principle of the system for solving the problem is similar to the method for adjusting local backlight brightness, the implementation of the adjusting system can refer to the implementation of the method for adjusting local backlight brightness, and repeated details are not repeated.
In specific implementation, the system for adjusting local backlight brightness provided by the embodiment of the present invention includes: an acquisition unit, a sorting unit and a selection unit,
the backlight control device comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for dividing a pixel area corresponding to each backlight partition in a backlight source into a plurality of sub-partitions and acquiring the maximum value of the pixel gray scale of each sub-partition; the maximum value of the pixel gray scale is the maximum value of the gray scale values of all the pixel points in each sub-partition;
the sorting unit is used for sorting the obtained maximum pixel gray scale values of the sub-partitions from large to small;
and the selecting unit is used for selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition.
In a specific implementation, in the system for adjusting local backlight luminance provided in the embodiment of the present invention, the selecting unit is specifically configured to ignore the maximum gray scale values of the pixels arranged in the first N serial numbers according to the maximum gray scale values of the pixels of the sorted sub-partitions and the number of the sub-partitions, and select the gray scale value of the pixel arranged in the N +1 th serial number to determine the adjustment signal, so as to adjust the backlight luminance of the backlight partition; wherein N is more than or equal to 1 and less than or equal to M, and M is the number of the sub-partitions.
Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the above system for adjusting local backlight brightness, where the display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention. The implementation of the display device can refer to the above embodiment of the method for adjusting local backlight brightness, and repeated details are not repeated.
The embodiment of the invention provides a method for adjusting local backlight brightness, an adjusting system and a display device thereof, wherein the method comprises the following steps: dividing a pixel area corresponding to each backlight subarea in the backlight source into a plurality of sub subareas, and acquiring the maximum value of the pixel gray scale of each sub subarea; sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small; and selecting the maximum value of the pixel gray scale except the first serial number according to the maximum value of the pixel gray scale of each ordered sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition. According to the invention, the selected maximum value of the pixel gray scale except the first serial number is used for determining the adjusting signal, so that backlight brightness mutation caused by movement of tiny bright blocks such as a mouse can be effectively avoided, visual impact on human eyes caused by local backlight brightness mutation is further effectively avoided, and the use experience of a user is remarkably improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A method for adjusting local backlight brightness is characterized by comprising the following steps:
dividing a pixel area corresponding to each backlight partition in a backlight source into a plurality of sub-partitions, and acquiring the maximum value of the pixel gray scale of each sub-partition; the maximum pixel gray scale value is the maximum value of the gray scale values of all the pixel points in each sub-partition;
sequencing the obtained maximum pixel gray scale values of the sub-partitions from large to small;
selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition;
selecting the maximum value of the pixel gray scale except the first serial number to determine an adjusting signal, which specifically comprises the following steps:
neglecting the maximum value of the gray scale of the pixels arranged in the first N serial numbers, and selecting the gray scale value of the pixels arranged in the (N + 1) th serial number to determine an adjusting signal; wherein N is more than or equal to 1 and less than M, and M is the number of the sub-partitions.
2. The method according to claim 1, wherein the pixel area corresponding to each backlight partition in the backlight source is divided into 16 sub-partitions having an arrangement structure of 4 x 4.
3. The method of claim 1, wherein each of the backlight segments comprises at least one light emitting diode.
4. A system for adjusting local backlight brightness, comprising: an acquisition unit, a sorting unit and a selection unit,
the acquisition unit is used for dividing a pixel area corresponding to each backlight partition in the backlight source into a plurality of sub-partitions and acquiring the maximum value of the pixel gray scale of each sub-partition; the maximum pixel gray scale value is the maximum value of the gray scale values of all the pixel points in each sub-partition;
the sorting unit is used for sorting the obtained maximum pixel gray scale values of the sub-partitions from large to small;
the selecting unit is used for selecting the maximum value of the pixel gray scale except the first serial number according to the sorted maximum value of the pixel gray scale of each sub-partition and the number of the sub-partitions to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition;
the selecting unit is specifically configured to ignore the maximum pixel gray scale values of the first N serial numbers according to the sorted maximum pixel gray scale values of the sub-partitions and the number of the sub-partitions, and select the pixel gray scale value of the N +1 th serial number to determine an adjusting signal so as to adjust the backlight brightness of the backlight partition; wherein N is more than or equal to 1 and less than M, and M is the number of the sub-partitions.
5. A display device comprising the local backlight brightness adjustment system of claim 4.
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| CN111899694B (en) * | 2019-05-06 | 2022-06-07 | 京东方科技集团股份有限公司 | Backlight control method and device of backlight module and display device |
| CN113674703B (en) * | 2021-08-12 | 2022-12-06 | Tcl华星光电技术有限公司 | Backlight module brightness correction method, display device and brightness correction device thereof |
| CN114236900A (en) * | 2021-11-02 | 2022-03-25 | 惠科股份有限公司 | Backlight module and display device |
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