CN112700751A - Display method and electronic equipment - Google Patents
Display method and electronic equipment Download PDFInfo
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- CN112700751A CN112700751A CN202011601683.8A CN202011601683A CN112700751A CN 112700751 A CN112700751 A CN 112700751A CN 202011601683 A CN202011601683 A CN 202011601683A CN 112700751 A CN112700751 A CN 112700751A
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The application provides a display method and electronic equipment, the display method is applied to a display device with a direct type backlight light source and a liquid crystal display panel, the direct type backlight light source is divided into a plurality of control blocks, and the display method comprises the following steps: determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed; and if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting that the display data of the pixel unit in the display area corresponding to the target control block is different from the data to be displayed. The backlight brightness adjusting technology is combined with the gray scale adjustment of the display panel to display images, so that the backlight brightness can be further reduced, and the purpose of saving the power consumption of a backlight light source is achieved. Because the backlight brightness and the gray scale of the display panel are adjusted simultaneously, more gray scale images can be displayed through different combination and collocation, and the contrast and the gray scale order of the images displayed by the electronic equipment are improved.
Description
Technical Field
The present invention relates to the field of integrated circuit technologies, and in particular, to a display method and an electronic device.
Background
At present, most of liquid crystal display screens use LEDs as backlight sources, and the LED backlight has two types, i.e., an edge-type backlight and a direct-type backlight, the edge-type backlight is light and thin and is currently the mainstream of the middle-sized liquid crystal display screen, and the direct-type backlight is gradually adopted by the liquid crystal display screen because the direct-type backlight can provide higher backlight brightness and higher dynamic contrast.
However, the direct-type backlight light source has a large number of LEDs, and thus the power consumption of the backlight is increased.
Disclosure of Invention
In view of the above, the present invention provides a display method and an electronic device to solve the problem of high power consumption of the backlight source in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a display method is applied to a display device with a direct type backlight source and a liquid crystal display panel, wherein the direct type backlight source is divided into a plurality of control blocks, and the display method comprises the following steps:
determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed;
if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel unit in the display area corresponding to the target control block to be different from the data to be displayed.
Preferably, the image to be displayed comprises a target image;
determining whether the image to be displayed and the target control block satisfy the control condition comprises:
and determining whether the image to be displayed and the target control block meet the control condition or not based on the overlapping relation of the target image and the target control block.
Preferably, the determining whether the image to be displayed and the target control area satisfy the control condition based on the overlapping relationship between the target image and the target control area specifically includes:
judging whether the target image is overlapped with at least two target control blocks;
if yes, the control condition is met;
if not, it is not satisfied.
Preferably, the method for determining the target image includes:
taking the image with the average gray scale of the target area larger than that of other areas as the target image;
or, taking an image with a preset gray scale range as the target image;
or, the image with the average gray scale of the target area smaller than that of other areas is taken as the target image.
Preferably, after the control condition is satisfied, the method further includes:
determining the area ratio of the target image in each target control block;
and when the area ratio is smaller than a preset threshold value, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel unit in the display area corresponding to the target control block to be different from the data to be displayed.
Preferably, the adjusting the backlight brightness of the target control block and the adjusting the display data of the pixel unit in the display area corresponding to the target block are different from the data to be displayed specifically includes:
and reducing the brightness of the backlight light source in the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target block to be different from the data to be displayed.
Preferably, when the average gray scale of the target image is within a first preset gray scale range, the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than a preset threshold is reduced;
and increasing the display gray scale of the pixel unit in the display area where the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value is located.
Preferably, when the average gray scale of the target image is within a second preset gray scale range, the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than a preset threshold is reduced;
and increasing the display gray scale of the pixel units in the display area corresponding to the area outside the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value.
Preferably, if the image to be displayed and the target control block do not satisfy the control condition, the image display is performed based on the data to be displayed.
The present invention also provides an electronic device comprising:
the backlight source comprises a direct type backlight source, a liquid crystal display panel and a controller, wherein the direct type backlight source is divided into a plurality of control blocks;
the controller comprises a first control circuit and a second control circuit, wherein the first control circuit is used for controlling the display brightness of the control blocks in a partitioning mode; the second control circuit is used for controlling display data of pixel units in a display area of the liquid crystal display panel;
the controller is also used for acquiring data to be displayed and determining a target control block related to the image to be displayed according to the data to be displayed; and when the image to be displayed and the target control block meet the control conditions, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target control block to be different from the data to be displayed.
According to the technical scheme, the backlight source is subjected to partition control to form a plurality of control blocks, the target control block corresponding to a certain gray-scale image in the image to be displayed is determined, the brightness of the backlight source of the target control block is adjusted, and meanwhile the gray scale of the display panel corresponding to the image in the control block is adjusted to compensate gray-scale change caused by adjustment of the brightness of the backlight source, so that the aim of displaying the image by using the backlight source with lower brightness is fulfilled on the basis that the display effect is not influenced, and the power consumption of the direct type backlight source is greatly reduced.
That is, the display method provided by the invention combines the backlight brightness adjustment technology with the gray scale adjustment of the display panel to display the image, so that the backlight brightness can be further reduced, and the purpose of saving the power consumption of the backlight light source is achieved. Because the backlight brightness and the gray scale of the display panel are adjusted at the same time, more gray scale images can be displayed by combining and matching the backlight brightness and the gray scale of the display panel, and the contrast and the gray scale order of the images displayed by the electronic equipment are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a display method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an image displayed on an LCD panel with 8-bit gray scale variation;
FIG. 4 is a schematic diagram of an image displayed on a liquid crystal display panel with 10-bit gray scale variation;
FIG. 5 is a diagram of an image to be displayed according to an embodiment of the present invention;
fig. 6 is a schematic diagram of backlight brightness adjustment corresponding to the image to be displayed shown in fig. 5 according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a display determination process according to an embodiment of the present invention;
FIG. 8 is a schematic view of an image with an average gray level of a target image greater than that of other regions;
FIG. 9 is a schematic view of an image in which the average gray scale of the target image is smaller than the average gray scale of other regions;
FIG. 10 is a schematic diagram of an image display after adjusting the backlight brightness and the gray scale of the display panel;
FIG. 11 is a flowchart illustrating a display method including a high grayscale image according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of an image displayed after adjusting the backlight source;
FIG. 13 is a schematic diagram of the display panel after adjustment;
FIG. 14 is a flowchart illustrating a method for displaying an image including low grayscale according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
As described in the background section, in the prior art, the number of LEDs used in the direct-type backlight light source is large, which results in an increase in power consumption of the backlight.
The inventors found that the reason for the above phenomenon is: in order to improve the advantages of high contrast and high brightness of a display image with direct type backlight in the prior art, a plurality of micro LEDs arranged in an array are used as the direct type backlight, but the power of a micro LED backlight source is larger, and the number of the micro LED backlight sources is larger, so that the power consumption of the direct type backlight is larger.
Based on this, the present invention provides a display method applied to a display device having a direct type backlight source and a liquid crystal display panel, wherein the direct type backlight source is divided into a plurality of control blocks, the display method includes:
determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed;
if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel unit in the display area corresponding to the target control block to be different from the data to be displayed.
The display method provided by the invention combines the backlight brightness adjusting technology with the gray scale adjustment of the display panel to display the image, so that the backlight brightness can be further reduced, and the purpose of saving the power consumption of the backlight light source is achieved. Because the backlight brightness and the gray scale of the display panel are adjusted at the same time, more gray scale images can be displayed by combining and matching the backlight brightness and the gray scale of the display panel, and the contrast and the gray scale order of the images displayed by the electronic equipment are improved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
To clearly illustrate the display method provided by the present invention, the definition of the gray scale in the present invention is first described: the gray scale is to divide the brightness variation between the brightest and darkest into several parts so as to control the brightness of the screen corresponding to the input signal. In a display device, each digital image is composed of a plurality of dots, called pixels, each of which can usually present a plurality of different colors, and is composed of three sub-pixels of red, green and blue, each of which has a full-bright light source behind it and then displays different brightness levels by different deflection of liquid crystal molecules. And the gray levels represent the different gradation levels from the darkest to the brightest. The more the intermediate levels are, the more exquisite the picture effect can be presented. Taking an 8-bit display device as an example, the display device can show 2 powers of 8, namely 256 brightness levels, and is called a 256-gray-scale display device.
Referring to fig. 1, fig. 1 is a flowchart of a display method according to an embodiment of the present invention; it should be noted that the display method provided by the embodiment of the invention is applied to a display device having a direct type backlight source and a liquid crystal display panel, and the direct type backlight source is divided into a plurality of control blocks.
The display method comprises the following steps:
s101: determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed;
s102: and if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting that the display data of the pixel unit in the display area corresponding to the target control block is different from the data to be displayed.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention; the display device 100 includes: the backlight module comprises a direct type backlight module 10 and a liquid crystal display panel 20 which are oppositely arranged, wherein the liquid crystal display panel 20 is arranged on the light emergent side of the direct type backlight module 10, and the direct type backlight module comprises an LED lamp panel 101, a support piece 102, a diffusion sheet 103 and an optical film group 104. Wherein, LED lamp plate 101 includes plate 1011 and is a plurality of LED lamp pearls 1012 that the array was arranged on being located the plate, does not restrict the size of LED lamp pearl in this embodiment, and according to backlight unit's control accuracy, LED lamp pearl can be MiniLED or Micro LED, also is miniature LED. In this embodiment, the number of micro LEDs on the LED lamp panel is not limited, and the number of micro LEDs is selected according to the control accuracy of the display panel.
Because backlight unit is straight following formula backlight unit, and includes a plurality of LED lamp pearls that are the array and arrange, consequently, can be through LED control system control LED drive circuit in a poor light, and then realize the light and dark of some region even single LED lamp pearl. In this embodiment, the backlight light sources arranged in an array, that is, the specific division manner of dividing the plurality of LED lamp beads into the plurality of control blocks, is not limited. Each control block can only comprise one LED lamp bead, namely, each control block controls one LED lamp bead, so that the brightness of each LED lamp bead is accurately controlled; when the number of the micro LED lamp beads is large and each micro-letter LED lamp bead corresponds to a pixel on a display panel, the brightness of each pixel can be controlled by controlling each LED lamp bead, but the control needs an LED driving circuit with strong function and large size; moreover, as the high resolution (PPI) of the display panel is developed, the number of pixels in a unit area is increased, and the required LED driving circuit is more and more complicated, so that the size of the block and the complexity of the LED driving circuit are controlled in an integrated manner, and optionally, the backlight light source may be divided into 144 partitions, 256 partitions, or more than 1000 partitions in this embodiment.
In the embodiment of the invention, when an image is displayed, firstly, the image to be displayed is obtained, the data to be displayed of the image to be displayed is analyzed through the image analysis system, then the LED backlight control system controls the LED driving circuit to drive the Mini LED array or the Micro LED array to carry out backlight control according to the control blocks according to the data to be displayed, meanwhile, the image processing system sends the data of the image to be displayed to the control end of the liquid crystal display panel to control the deflection of liquid crystal molecules, so that the data displayed by the pixel units in the corresponding display area is different from the data to be displayed, but the gray scale of the image finally presented by the display data of the pixel units in the display area corresponding to each control block is compensated, and the image to be displayed is finally displayed by the display device.
In other words, the display method provided in the embodiment of the present invention combines gray scale control of the display panel on the basis that the brightness of the backlight light source is adjusted according to the control block, so that the display method is more optimized, and the contrast of the displayed image is stronger and the gray scale order is more on the basis of reducing the backlight brightness and saving the backlight power consumption, thereby enabling the display device with the same hardware to display the image with the higher gray scale order.
Specifically, the image to be displayed in this embodiment is the target display image, that is, the image finally displayed by the display device. And the data to be displayed is signal data corresponding to the image to be displayed. The gray scale of the liquid crystal display panel is generally 8-bit gray scale change, and the lower gray scale is 6 bits or even lower; the height can be up to 10 bits or even higher. If the gray scale change is adjusted only through the liquid crystal display panel without adding other factors to influence the gray scale change, the final displayed gray scale of the image is limited by the gray scale change capability of the liquid crystal display panel, namely, the display panel can display large gray scale change images, and the large gray scale change images are displayed. For example, as shown in fig. 3 and 4, fig. 3 is a schematic diagram of an image displayed on an lcd panel with 8-bit gray scale variation; FIG. 4 is a schematic diagram of an image displayed on a liquid crystal display panel with 10-bit gray scale variation; comparing fig. 3 and 4, it can be seen that the image gray scale of the 10-bit gray scale variation shown in fig. 4 is more continuous. If the maximum gray scale change of the liquid crystal display panel is 8 bits, even if the display data corresponding to the image with 10-bit gray scale change is provided for the liquid crystal display panel, the liquid crystal display panel with the maximum gray scale change of 8 bits receives the display data with 10-bit gray scale change, but the finally presented image can only be the image with 8-bit gray scale change.
In the display method provided by the embodiment of the invention, the gray scale change caused by changing the backlight brightness is combined with the gray scale change of the display panel, so that the liquid crystal display panel with low gray scale change can also present an image with high gray scale change.
The display method comprises the steps of firstly determining an image to be displayed corresponding to data to be displayed, wherein the image to be displayed can be an image with gray scale change higher than that of a liquid crystal display panel or an image with gray scale change lower than or equal to that of the liquid crystal display panel. And then acquiring a target control block related to the image to be displayed.
In this embodiment, a target control block related to an image to be displayed is obtained, where the image to be displayed includes an image area with higher brightness and an image area with lower brightness, and the target control block corresponding to the bright and dark areas of the image to be displayed is obtained according to the difference between the bright and dark areas in the image to be displayed. Please refer to fig. 5 and fig. 6, wherein fig. 5 is an image to be displayed according to an embodiment of the present invention; fig. 6 is a schematic diagram of backlight brightness adjustment corresponding to the image to be displayed shown in fig. 5 according to an embodiment of the present invention; where the dashed box 105 in fig. 6 corresponds to the sun in fig. 5, each small box 106 in fig. 6 represents a control block. In this embodiment, each control block 106 in fig. 6 is a target control block. The brightness of each control block is adjusted by corresponding different gray scales of each part of the image to be displayed, so that local backlight adjustment is realized, and then the gray scale change of the liquid crystal display panel is adjusted, so that the gray scale of the image to be displayed is finally displayed.
In order to accurately control the brightness of each control block, in this embodiment, after the target control block and the image to be displayed are obtained, it may be further determined whether the image to be displayed and the target control block meet the control condition, if yes, the backlight brightness corresponding to the target control block is adjusted, and meanwhile, the display data of the pixel unit in the corresponding display area is adjusted, and after the two are combined, the image to be displayed is obtained, which is equivalent to combining the two, and finally the image to be displayed is displayed. Therefore, in the present embodiment, the data displayed by the pixel unit of the display area corresponding to the target control block is not necessarily the data to be displayed corresponding to the image to be displayed.
It should be noted that, when the image to be displayed and the target control block do not satisfy the control condition, the image display is performed based on the data to be displayed. That is, at this time, the backlight brightness of the program guide control block is not adjusted, and the input data of the display panel is the same as the data to be displayed corresponding to the image to be displayed.
In addition, as shown in fig. 7, fig. 7 is a flow chart of display determination according to an embodiment of the present invention; the display method comprises a process of gray scale continuity analysis of an image to be displayed. Thereby judging whether the display method shown in fig. 1 in the above embodiment of the present invention needs to be further employed.
Referring to fig. 7, the display determination method includes:
s201: acquiring an image to be displayed;
the image to be displayed is the image that the display device is to finally present. Each pixel of the image to be displayed has a corresponding gray scale.
S202: analyzing the image to be displayed, and judging whether the displayed image is an image with continuous gray scale change; if yes, the process proceeds to step S203, otherwise, the process proceeds to step S206.
In this embodiment, a specific determination standard for continuous gray scale change is not limited, and optionally, a threshold may be set, and when a difference between gray scales of any two adjacent pixels is greater than the threshold, the image is not considered to be an image with continuous gray scale change; and when the gray scale difference of any two adjacent pixels is less than or equal to the threshold value, the image with continuous gray scale change is determined.
In order to reduce the calculation workload, it may be further configured that when the difference between the average gray levels of the pixels in any two adjacent rows or two adjacent columns is greater than the threshold, the image is not considered to have continuous gray level change. When the difference of the average gray levels of the pixels in any two adjacent rows or two adjacent columns is smaller than or equal to the threshold value, the image with continuous gray level change is considered. The difference between the average gray levels of any two adjacent rows of pixels is: the average gray scale of all pixels in one row and the average gray scale of all pixels in one row adjacent to the average gray scale.
S203: judging whether the gray scale change continuity of the image to be displayed is matched with the gray scale of the liquid crystal display panel; if not, entering S204; if so, the process proceeds to S206.
The continuous gray scale change of the image to be displayed and the gray scale matching of the liquid crystal display panel in the embodiment specifically mean that the gray scale of the liquid crystal display panel is greater than or equal to the gray scale change of the image to be displayed, that is, the liquid crystal display panel can display all the gray scales of the image to be displayed without adding other gray scale adjusting means. The continuous gray scale change type of the image to be displayed is not matched with the gray scale of the liquid crystal display panel, that is, the gray scale order of the liquid crystal display panel is small, so that when the image to be displayed is directly displayed, the gray scale order of the image to be displayed is reduced, and the image to be displayed cannot be displayed according to the corresponding data to be displayed.
S204: determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed;
s205: and if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting that the display data of the pixel unit in the display area corresponding to the target control block is different from the data to be displayed.
When the gray scale of the liquid crystal display panel is not matched with the gray scale change of the image to be displayed, the display method in the embodiment is utilized, the adjustment of the brightness of the backlight light source is added, and meanwhile, the gray scale change of the liquid crystal display panel corresponding to the backlight control block with the adjusted brightness is adjusted, so that the purpose of increasing the gray scale order finally presented by the display device is achieved, and the display device can display the image to be displayed with higher gray scale. And because the brightness of part of the backlight light sources is adjusted, the power consumption of part of the backlight light sources can be saved.
S206: the backlight source is full bright, and the liquid crystal display panel receives control of data to be displayed corresponding to the image to be displayed;
when the gray scale of the liquid crystal display panel is matched with the gray scale change of the image to be displayed, the gray scale of the liquid crystal display panel can meet the gray scale change of the image to be displayed, and the image to be displayed can be displayed without adjusting backlight.
It should be noted that, in order to reduce the power consumption of the backlight, when the gray scale of the liquid crystal display panel matches the gray scale change of the image to be displayed, the backlight light source may also be adjusted to reduce the backlight brightness, and then the gray scales of the liquid crystal display panel are superimposed to obtain the image to be displayed for displaying, which is not limited in this embodiment.
S207: and displaying the output image.
The output image is displayed in the embodiment of the invention, the image to be displayed can be displayed under different conditions, and only when the image to be displayed is a discontinuous gray scale image and the image to be displayed is matched with the display panel, the gray scale of the final display image is controlled by the liquid crystal display panel, and the output image is directly displayed; and when the image to be displayed is not matched with the display panel, the output image is displayed after combined control by adjusting the gray scales of the backlight light source and the display panel.
In summary, the display method shown in fig. 7, that is, before the method of obtaining the gray scale change of the image to be displayed by using the backlight adjustment and the liquid crystal display panel combination adjustment, further includes analyzing the continuity of the gray scale change of the image to be displayed, if the gray scale of the image to be displayed is not continuous, the backlight light source is fully bright, and the data to be displayed of the image to be displayed is directly used to control the liquid crystal molecules of the liquid crystal display panel to deflect, so as to obtain the image to be displayed, that is, the display method in the prior art; if the gray scale change of the image to be displayed is discontinuous, the continuity of the gray scale change of the image to be displayed is analyzed, whether the gray scale change of the liquid crystal display panel is matched with the gray scale change of the image to be displayed is judged, if so, the display panel can meet the gray scale change of the image to be displayed, and therefore, the image to be displayed can be directly and normally displayed. If not, the image to be displayed needs more gray scale orders; and if the display panel can not provide the image, the adjustment of the backlight is introduced, so that the gray scale change caused by the backlight brightness and the gray scale change of the display panel are superposed, combined and adjusted, and finally the gray scale change of the image to be displayed is obtained and the image to be displayed is presented.
In addition, it should be noted that, because the display method provided in the embodiment of the present invention adds the adjustment of the backlight, the adjustment of the backlight brightness and the adjustment of the gray scale of the display panel are used to display the image in a comprehensive manner, and therefore, regardless of whether the gray scale of the image to be displayed is continuous or not, and whether the gray scale change of the image to be displayed is matched with the liquid crystal display panel or not, the gray scale change caused by the brightness decrease of the backlight light source can be compensated by adjusting the gray scale of the display panel, that is, the display method provided in the embodiment of the present invention has universality, and increases the gray scale change of the displayed image on the basis of reducing the backlight power consumption, so that the gray scale.
It should be noted that, according to different specific situations of the image to be displayed, the manner of adjusting the gray scales of the backlight light source and the display panel in the embodiment of the present invention is different.
Specifically, in the embodiment of the present invention, the image to be displayed includes a target image; and determining whether the image to be displayed and the target control block satisfy the control condition comprises: and determining whether the image to be displayed and the target control block meet the control condition or not based on the overlapping relation of the target image and the target control block. The overlapping relationship between the target image and the target control block includes overlapping across the control blocks and not overlapping across the control blocks, i.e., the target image may be located in only a single target control block or may be located in multiple target control blocks at the same time.
Therefore, determining whether the image to be displayed and the target control block satisfy the control condition based on the overlapping relationship between the target image and the target control block specifically includes: judging whether the target image is overlapped with at least two target control blocks; if yes, the control condition is met; if not, it is not satisfied.
Continuing to refer to fig. 6, the dotted line frame corresponds to the sun in fig. 5, and the image shown in fig. 5 in this embodiment is the image to be displayed, which corresponds to the data to be displayed; the sun in fig. 5 is a target image, each small square in fig. 6 is a plurality of control blocks into which the backlight light source is divided, and each control block may include a plurality of Mini LEDs or Micro LEDs, which is not limited in this embodiment.
In this embodiment, the specific form of the target image is not limited, and the method for determining the target image includes: taking the image with the average gray scale of the target area larger than that of other areas as a target image; or, taking an image with a preset gray scale range as a target image; or, the image with the average gray scale of the target area smaller than that of other areas is taken as the target image.
In some images, the average gray scale of the target image in the area is greater than the average gray scale of other areas, which is equivalent to an area with significantly higher brightness than other areas in one image, please refer to fig. 8, fig. 8 is an image diagram of the target image with the average gray scale greater than the average gray scale of other areas, fig. 8 illustrates a target image 107 in a circular shape, and all the control blocks are white to represent that the brightness of the backlight source is 100%; in other embodiments of the present invention, the average gray scale in the area where the target image is located may be smaller than the average gray scale in other areas, which is equivalent to an area in which the brightness is significantly lower than that in other areas in one image, please refer to fig. 9, fig. 9 is an image schematic diagram in which the average gray scale of the target image is smaller than the average gray scale in other areas, fig. 9 also illustrates an area related to a circle of the target image 108, and the control blocks are all white to represent that the brightness of the backlight source is 100%; or, the image in the preset gray scale range can be selected as the target image through the preset gray scale range, and the image outside the preset gray scale range is the non-target image.
The target control blocks related to the image to be displayed specifically refer to control blocks covered by the orthographic projection of the target image on the backlight module after the target image is confirmed, which are target control blocks, for example, a3, b2, b3 and c3 in fig. 8 and 9.
It should be noted that, in order to reduce the backlight brightness to the maximum extent, save the backlight power consumption, and ensure the normal display of the target image at the same time, in this embodiment, optionally, after the control condition is satisfied, the method further includes: determining the area ratio of the target image in each target control block; and when the area ratio is smaller than the preset threshold value, adjusting the backlight brightness of the target control block, and adjusting that the display data of the pixel units in the display area corresponding to the target control block is different from the data to be displayed.
That is, when the area ratio is greater than or equal to the preset threshold, even if the target image overlaps with the plurality of target control blocks, only the brightness of the control block having the area ratio smaller than the preset threshold and the display data of the display area pixel unit of the display panel of the target image portion corresponding to the control block having the adjusted brightness are adjusted. In this embodiment, the preset threshold is not limited, and optionally, the preset threshold is 20% of the area of a single control block.
It should be noted that the display method provided in the embodiment of the present invention mainly aims to reduce the backlight brightness to reduce the power consumption of the backlight light source, and therefore, the adjusting the backlight brightness of the target control block and the adjusting the display data of the pixel unit in the display area corresponding to the target block in the embodiment are different from the data to be displayed, which specifically includes: and reducing the brightness of the backlight light source in the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target block to be different from the data to be displayed.
The final displayed image gray scale is adjusted comprehensively by reducing the brightness of the backlight light source and adjusting the display data of the pixel units in the display area corresponding to the target block.
When the target image is a high grayscale image, such as the image shown in fig. 8, the target image 107 is a high grayscale image; that is, when the average gray scale of the target image is within a first preset gray scale range, reducing the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than a preset threshold; and increasing the display gray scale of the pixel unit in the display area where the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value is located.
It should be noted that, in the b3 control block in this embodiment, the area ratio of the target image is greater than 20% of the area of the control block, and in order to ensure normal display of the display panel in the control block and avoid poor display, in this embodiment, it is ensured that the block is displayed in a manner that the backlight brightness and the gray scale of the display panel are not adjusted as much as possible, that is, the target control blocks corresponding to the target images with the area ratio smaller than the preset threshold value in this embodiment only include the control blocks shown in a3, b2, and c 3.
FIG. 10 is a schematic diagram of an image display after adjusting the backlight brightness and the gray scale of the display panel; as can be seen from comparing fig. 8 and fig. 10, in the embodiment, the target control block b3 corresponding to the area ratio of the target image 107 being greater than or equal to the preset threshold value is not, so that the brightness of the target control block b3 is not reduced, and the display gray scale of the pixel unit of the display area where the target image corresponding to the target control block b3 is located is not adjusted, or is light gray, that is, 107A. And reducing the brightness of the target control blocks a3, b2, c3 corresponding to the target images with the area ratio smaller than the preset threshold. From white in fig. 8 to dark gray in fig. 10; meanwhile, the display gray scales of the pixel units of the display area where the target images in the target control blocks a3, b2 and c3 are located are increased; as shown at 107B in fig. 10.
Referring to fig. 11, fig. 11 is a schematic flow chart illustrating a display method including a high grayscale image according to an embodiment of the present invention; for determining the continuity of the image to be displayed, reference may be made to the display method flow shown in fig. 7, which is not described in detail in this embodiment.
The method for displaying an image including a high gray scale provided in the present embodiment specifically includes:
s301: acquiring an image to be displayed;
s302: analyzing the image to be displayed, and judging whether the target image is overlapped with at least two target control blocks, if so, executing S303, and if not, executing S305.
S303: judging whether the area ratio of the target image in each target control block is smaller than a preset threshold value or not; if so, S304 is executed, and if not, S305 is executed.
S304: reducing the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value; increasing the display gray scale of the pixel unit in the display area where the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value is located;
s305: the backlight source is full bright, and the liquid crystal display panel receives control of data to be displayed corresponding to the image to be displayed;
s306: and displaying the output image.
As can be seen from comparing fig. 8 and 10, although the finally displayed image is the gray scale of the image to be displayed, the power consumption of the backlight light source can be saved by reducing the brightness of the target control blocks a3, b2, c 3. In addition, because the brightness of the target control blocks a3, b2, and c3 is already turned down, the low gray-scale image portions in the corresponding target control blocks a3, b2, and c3 are darker, which also increases the contrast between the high gray-scale image 107 and the surrounding low gray-scale image, thereby avoiding the problem of unclear boundary of the high gray-scale image due to halo phenomenon near the high gray-scale image.
Correspondingly, when the target image is a low-gray-scale image, such as the image shown in fig. 9, the target image 108 is a low-gray-scale image; that is, when the average gray scale of the target image is within the second preset gray scale range, the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than the preset threshold is reduced; and increasing the display gray scale of the pixel units in the display area corresponding to the area outside the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value.
Similarly, since the area ratio of the target image in the b3 control block in this embodiment is greater than 20% of the area of the control block, in order to ensure the normal display of the display panel in the control block and avoid the display failure, in this embodiment, it is ensured that the block is displayed in a manner that the backlight brightness and the gray scale of the display panel are not adjusted as much as possible, that is, the target control blocks corresponding to the target images with the area ratio smaller than the preset threshold value in this embodiment only include the control blocks shown in a3, b2, and c 3.
As shown in fig. 12 and 13, fig. 12 is a schematic diagram of image display after adjusting the backlight source, and fig. 13 is a schematic diagram of the display panel after adjusting; as can be seen from comparing fig. 9 and fig. 12, in the embodiment, the target control block b3 corresponding to the area ratio of the target image 108 being greater than or equal to the preset threshold value is not used, so that the brightness of the target control block b3 is not reduced, and the display gray scale of the pixel unit of the display area where the target image corresponding to the corresponding target control block b3 is located is not adjusted, that is, as shown in fig. 108A. And reducing the brightness of the target control blocks a3, b2, c3 corresponding to the target images with the area ratio smaller than the preset threshold. And increasing the display gray scale of the pixel units in the display area corresponding to the region outside the target image 108 in the target control blocks a3, B2 and c3 corresponding to the target images with the area ratio smaller than the preset threshold value, as shown in the 108B part in fig. 13, by increasing the display gray scale of the region corresponding to the 108B part in the display panel, the gray scale change of the high gray scale image outside the target region caused by the reduction of the backlight brightness of the target control blocks a3, B2 and c3 is compensated, so that the high gray scale image outside the target region keeps a higher gray scale.
Referring to fig. 14, fig. 14 is a schematic flow chart of a display method including a low grayscale image according to an embodiment of the present invention; for determining the continuity of the image to be displayed, reference may be made to the display method flow shown in fig. 7, which is not described in detail in this embodiment.
The method for displaying an image including a high gray scale provided in the present embodiment specifically includes:
s401: acquiring an image to be displayed;
s402: analyzing the image to be displayed, judging whether the target image is overlapped with at least two target control blocks, if so, executing S403, and if not, executing S405.
S403: judging whether the area ratio of the target image in each target control block is smaller than a preset threshold value or not; if yes, go to S404, otherwise go to S405.
S404: reducing the brightness of the backlight light source in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value; increasing the display gray scale of the pixel units in the display area corresponding to the area outside the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value;
s405: the backlight source is full bright, and the liquid crystal display panel receives control of data to be displayed corresponding to the image to be displayed;
s406: and displaying the output image.
As can be seen from comparing fig. 9 and 12 with fig. 13, although the finally displayed image is the gray scale of the image to be displayed, the power consumption of the backlight light source can be saved by reducing the brightness of the target control blocks a3, b2, c 3. In addition, because the brightness of the target control blocks a3, b2, c3 has been reduced, the low gray-scale image portions in the corresponding target control blocks a3, b2, c3 are darker, and the gray scale of the surrounding high gray-scale image is increased, so that the contrast between the low gray-scale image 108 and the surrounding high gray-scale image is increased, and the problem of unclear boundary of the high gray-scale image due to the halo phenomenon occurring near the high gray-scale image can also be avoided.
Referring to fig. 15, fig. 15 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, where the electronic device includes: a direct type backlight source 151, a liquid crystal display panel 152 and a controller 153, wherein the direct type backlight source 151 is divided into a plurality of control blocks 151';
the controller 153 includes a first control circuit 1531 and a second control circuit 1532, the first control circuit 1531 is configured to control the display luminance of the plurality of control blocks 151' in a divisional manner; the second control circuit 1532 is used for controlling the display data of the pixel units in the display area of the liquid crystal display panel 152;
the controller 153 is further configured to obtain data to be displayed, and determine a target control block related to an image to be displayed according to the data to be displayed; and when the image to be displayed and the target control block meet the control conditions, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target control block to be different from the data to be displayed.
The controller can simultaneously control backlight adjustment and display data of the pixel units in the display area, and simultaneously adjust backlight brightness and gray scale of the display panel, and through different combination and collocation of the backlight brightness and the gray scale, the backlight brightness can be reduced, backlight power consumption can be saved, display of more gray scale images can be realized, and accordingly contrast and gray scale order of the display images of the electronic equipment are improved.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A display method is applied to a display device with a direct type backlight source and a liquid crystal display panel, wherein the direct type backlight source is divided into a plurality of control blocks, and the display method comprises the following steps:
determining an image to be displayed corresponding to the data to be displayed and a target control block related to the image to be displayed;
if the image to be displayed and the target control block meet the control condition, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel unit in the display area corresponding to the target control block to be different from the data to be displayed.
2. The display method according to claim 1, wherein the image to be displayed includes a target image;
determining whether the image to be displayed and the target control block satisfy the control condition comprises:
and determining whether the image to be displayed and the target control block meet the control condition or not based on the overlapping relation of the target image and the target control block.
3. The method according to claim 2, wherein the determining whether the image to be displayed and the target control block satisfy the control condition based on the overlapping relationship between the target image and the target control block specifically comprises:
judging whether the target image is overlapped with at least two target control blocks;
if yes, the control condition is met;
if not, it is not satisfied.
4. The display method according to claim 2, wherein the method of determining the target image includes:
taking the image with the average gray scale of the target area larger than that of other areas as the target image;
or, taking an image with a preset gray scale range as the target image;
or, the image with the average gray scale of the target area smaller than that of other areas is taken as the target image.
5. The display method according to claim 3, further comprising, after the control condition is satisfied:
determining the area ratio of the target image in each target control block;
and when the area ratio is smaller than a preset threshold value, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel unit in the display area corresponding to the target control block to be different from the data to be displayed.
6. The method according to claim 5, wherein the adjusting the backlight brightness of the target control block and the adjusting the display data of the pixel units in the display area corresponding to the target block are different from the data to be displayed specifically comprises:
and reducing the brightness of the backlight light source in the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target block to be different from the data to be displayed.
7. The display method according to claim 6,
when the average gray scale of the target image is within a first preset gray scale range, reducing the brightness of a backlight light source in a target control block corresponding to the target image with the area ratio smaller than a preset threshold value;
and increasing the display gray scale of the pixel unit in the display area where the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value is located.
8. The display method according to claim 6,
when the average gray scale of the target image is within a second preset gray scale range, reducing the brightness of a backlight light source in a target control block corresponding to the target image with the area ratio smaller than a preset threshold value;
and increasing the display gray scale of the pixel units in the display area corresponding to the area outside the target image in the target control block corresponding to the target image with the area ratio smaller than the preset threshold value.
9. The display method according to claim 1, wherein if the image to be displayed and the target control block do not satisfy a control condition, displaying the image based on the data to be displayed.
10. An electronic device, comprising:
the backlight source comprises a direct type backlight source, a liquid crystal display panel and a controller, wherein the direct type backlight source is divided into a plurality of control blocks;
the controller comprises a first control circuit and a second control circuit, wherein the first control circuit is used for controlling the display brightness of the control blocks in a partitioning mode; the second control circuit is used for controlling display data of pixel units in a display area of the liquid crystal display panel;
the controller is also used for acquiring data to be displayed and determining a target control block related to the image to be displayed according to the data to be displayed; and when the image to be displayed and the target control block meet the control conditions, adjusting the backlight brightness of the target control block, and adjusting the display data of the pixel units in the display area corresponding to the target control block to be different from the data to be displayed.
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