CN101593490B - Method and system for controlling backlight sources of display device - Google Patents
Method and system for controlling backlight sources of display device Download PDFInfo
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Abstract
The invention discloses a method and a system for controlling the backlight sources of a display device. The method comprises the following steps: carrying out display analysis on divided M data blocks to be displayed to obtain M parameters to be displayed correspondingly; detecting and obtaining N parameters to be displayed which does not satisfy the target display parameters from the M parameters to be displayed; controlling the backlight sources corresponding to the N data blocks to be displayed to display according to N target display parameters; controlling the backlight sources corresponding to the M data blocks to be displayed which are subtracted by N data blocks to be displayed to display according to the parameters to be displayed after the display analysis, so as to realize the target backlight display of the area where the backlight sources are located in the area control display areas. The invention also discloses a system for controlling the backlight sources of a display device, comprising an acquisition unit, a division unit, an analysis unit and a control unit. With the adoption of the method and the system in the invention, the backlight display of the display device can be controlled according to contents and regulated dynamically, thus greatly reinforcing the image display effect of the panel.
Description
Technical Field
The present invention relates to a technique for controlling a backlight of a display device, and more particularly, to a method and a system for dynamically controlling a backlight of a display device.
Background
The current techniques for controlling the backlight of a display device are generally: a technique of using a Light Emitting Diode (LED) as a backlight of a panel control panel. Currently, LED backlights are already available in high-end notebooks and lcd tvs. The LED backlight is composed of a plurality of grid-shaped semiconductors, and each grid is provided with one LED semiconductor, so that the LED backlight successfully realizes the planarization of a light source. The LED backlight source technology has the advantages that: the color filter has high brightness and can realize stable brightness and color expression in a life span range. Secondly, the color gamut has wider color gamut, generally exceeds the color gamut of national television system committee NTSC and European broadcasting union EBU, and can realize more gorgeous color. And thirdly, the backlight white balance can be adjusted, and the whole contrast is ensured. When the user's video source is switched between the computer and the DVD, the white balance can be easily adjusted between 9600K and 6500K without sacrificing brightness and contrast. And fourthly, real-time color management is realized. Because red, green and blue lights are independently emitted, the display color characteristics of the current panel can be easily and accurately controlled. It can provide continuous area array light source for large size panel.
However, in the process of implementing the present invention, the inventors found that the following problems exist in the prior art: since the backlight display of the current display device, especially the display device with LED backlight, is supplied by the whole module and cannot be dynamically adjusted, it is impossible to provide fine control of the backlight display of the display device.
Disclosure of Invention
In view of the above, the present invention provides a method and a system for controlling a backlight of a display device, which can control and dynamically adjust the backlight display of the display device according to the content, thereby greatly enhancing the image display effect of the panel.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a method of controlling a backlight of a display device, the method comprising: presetting display area division parameters and target display parameters;
acquiring data to be displayed, acquiring display area division parameters and acquiring target display parameters; dividing the data to be displayed into M data blocks to be displayed according to the display area division parameters;
performing display analysis on the M data blocks to be displayed, and correspondingly obtaining M parameters to be displayed; detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters;
controlling the backlight sources corresponding to the N data blocks to be displayed to display according to the N target display parameters; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize area control of the target backlight display of the area where the backlight sources are located in the display area.
Wherein the display area division parameter is: parameters for dividing the display device according to the number and arrangement of the backlight sources; the target display parameters are as follows: and displaying the data to be displayed by the display requirement parameters.
The display area division parameters specifically include: dividing picture areas; the target display parameters are specifically: a brightness parameter, and/or a contrast parameter, and/or a color parameter.
The dividing the data area to be displayed into M data blocks to be displayed according to the display area division parameter specifically includes: dividing the data to be displayed into M data blocks to be displayed according to the image area division mode, wherein M is an integer greater than or equal to two; and when the display device is a display device of a light-emitting diode (LED) backlight source, the number of the LED lamps is less than or equal to M.
The image area division mode is a non-rectangular division mode.
The display analysis of the M data blocks to be displayed specifically includes: and performing display analysis on the M data blocks to be displayed according to the brightness parameter, the contrast parameter and the color parameter, wherein M is an integer greater than or equal to two.
Wherein the zone control includes: and controlling the whole display picture area.
Wherein the zone control includes: and controlling the pixel points in the region.
Wherein the zone control includes: and controlling according to the content of the read video frame or picture.
A system for controlling a backlight of a display device, the system comprising: the device comprises an acquisition unit, a dividing unit, an analysis unit and a control unit; wherein,
the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring data to be displayed, acquiring preset display area division parameters and acquiring preset target display parameters;
the dividing unit is used for dividing the data to be displayed into M data blocks to be displayed according to the display area dividing parameters after the data to be displayed and the display area dividing parameters are received from the acquiring unit;
the analysis unit is used for receiving the M data blocks to be displayed from the dividing unit, and performing display analysis on the M data blocks to be displayed after receiving the target display parameters from the acquisition unit, so as to correspondingly obtain M parameters to be displayed; detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters;
the control unit is used for receiving the N to-be-displayed parameters from the analysis unit and controlling the backlight sources corresponding to the N to-be-displayed data blocks to display according to the N target display parameters after receiving the target display parameters from the acquisition unit; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize area control of the target backlight display of the area where the backlight sources are located in the display area.
The display area dividing parameter is specifically a picture area dividing mode; the dividing unit is further configured to perform area division on the data to be displayed according to the picture area dividing manner, and divide the data to be displayed into M data blocks to be displayed, where M is an integer greater than or equal to two.
The target display parameters specifically include: a brightness parameter, and/or a contrast parameter, and/or a color parameter; the analysis unit is further configured to perform display analysis on the M data blocks to be displayed according to the brightness parameter, and/or the contrast parameter, and/or the color parameter, where M is an integer greater than or equal to two.
The control unit is further used for realizing target backlight display of an area where the backlight source is located in the display area by area control in an area control mode for controlling the whole display picture area; or,
the target backlight display of the area where the backlight source is located in the display area is controlled by the area in an area control mode of controlling the pixel points in the area; or,
and realizing the target backlight display of the area where the backlight source is located in the area control display area in an area control mode of controlling according to the content of the read video frame or picture.
Because the current display device, especially the display device of the LED backlight, has the LED backlight composed of the matrix, the picture details can be better represented by controlling different matrix points, thereby achieving the purpose of enhancing the picture display effect of the panel, such as enhancing the contrast and gray scale of the panel. According to the array arrangement of the backlight source of the display device, the display area division parameters are preset for the data to be displayed, so that the data to be displayed is divided into M data blocks to be displayed according to the display area division parameters. Target display parameters are also preset, when N to-be-displayed parameters which do not meet the target display parameters are detected and obtained after the divided M to-be-displayed data blocks are subsequently displayed and analyzed, the N to-be-displayed parameters are adjusted according to the preset target display parameters, and backlight sources corresponding to the N to-be-displayed data blocks are controlled to display according to the N target display parameters; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize area control of the target backlight display of the area where the backlight sources are located in the display area. Thereby enhancing the picture display effects of contrast, gray scale, color and the like.
The following are advantages after the invention is adopted:
first, the present invention can control the backlight display of the area where the backlight source of the display device is located, even the backlight display of the area where the single backlight source is located, according to the content.
Secondly, the invention can obtain more outstanding picture quality.
And thirdly, the defect of uniformly adjusting the backlight source module of the display device is avoided by adopting the invention.
Drawings
FIG. 1 is a schematic flow chart of the implementation of the principle of the method of the present invention;
FIG. 2 is a diagram illustrating an embodiment of a backlight template data format according to the present invention;
FIG. 3 is a diagram illustrating image division according to an embodiment of the present invention;
FIG. 4 is a schematic workflow diagram of an embodiment of the method of the present invention;
FIG. 5 is a schematic diagram of a structure of an embodiment of the system of the present invention.
Detailed Description
According to the array arrangement of the backlight source of the display device, display area division parameters are preset for data to be displayed, so that the data to be displayed are divided into M data blocks to be displayed according to the display area division parameters. The invention also presets target display parameters, and when N to-be-displayed parameters which do not meet the target display parameters are detected and obtained after the divided M to-be-displayed data blocks are subsequently displayed and analyzed, the N to-be-displayed parameters are adjusted according to the preset target display parameters, and the backlight sources corresponding to the N to-be-displayed data blocks are controlled to display according to the N target display parameters. Thereby enhancing the picture display effects of contrast, gray scale, color and the like.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings by way of examples.
As shown in fig. 1, a method for controlling a backlight of a display device includes the steps of:
Here, the display device may be a display device of an LED backlight, and a display device equivalent or similar to an LED backlight display and light emitting mechanism.
Here, the area division parameter is a parameter for dividing the display device according to the number and arrangement of the backlight sources, such as a picture area division manner; the target display parameter refers to a display requirement parameter of data to be displayed, such as a brightness parameter, and/or a contrast parameter, and/or a color parameter. For simplicity and ease of use of subsequent operations, the region division parameter and the target display parameter may be stored in a template, which may be referred to as a backlight template, and then the parameters stored in the backlight template include: the picture area dividing mode, and/or the brightness parameter, and/or the contrast parameter, and/or the color parameter. And the established backlight template comprises: a natural backlight template, a colorful backlight template, a contrast-improving backlight template and a user-defined template. The created backlight template is stored on the display.
For the backlight template, for example, fig. 2 is a schematic diagram of a backlight template data format according to an embodiment of the present invention. In fig. 2, the backlight template data format includes the name of the backlight template and the parameters stored in the backlight template. The parameters stored in the backlight template comprise a picture area dividing mode, a contrast parameter and a color parameter.
When the area division parameter and the target display parameter are placed in the backlight template for storage, the area division parameter specifically comprises: in the image area dividing manner, in step 101, dividing the data area to be displayed into M data blocks to be displayed according to the display area dividing parameter specifically includes: dividing the data to be displayed into M data blocks to be displayed according to a picture area division mode, wherein M is an integer greater than or equal to two; and when the display device is a display device of a light-emitting diode (LED) backlight source, the number of the LED lamps is less than or equal to M.
Here, the screen region division manner is a non-rectangular division manner, that is, the screen region division manner is not limited to the rectangular division manner. For example, the non-rectangular division includes a diamond division, a circular division, or a honeycomb division. The selection principle of the picture area division mode is as follows: the area division is to maintain the uniformity of the LED backlight. For example, if this selection principle is not followed, some regions may have high brightness and some regions may have low brightness, and the brightness of the whole region may be uneven. Thereby causing a reduction in picture display effect and affecting the picture display effect.
FIG. 3 is a diagram illustrating an embodiment of frame division according to the present invention, wherein, as shown in FIG. 3, when the rectangular division is adopted, the whole display frame area is divided into a plurality of rectangular areas. If the rhombic division mode is adopted, the whole display picture area is divided into a plurality of rhombic areas.
102, performing display analysis on the M data blocks to be displayed to correspondingly obtain M parameters to be displayed; and detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters.
Here, N is an integer and 0. ltoreq. N.ltoreq.M. Then, M-N to-be-displayed parameters meeting the target display parameters are detected and acquired, and the M-N to-be-displayed parameters correspond to the M-N to-be-displayed data blocks. Since only N to-be-displayed parameters that do not satisfy the target display parameter need to be dynamically adjusted, and M-N to-be-displayed parameters that satisfy the target display parameter need not be adjusted, in the subsequent step 103, for the M-N to-be-displayed data blocks, that is, for the N to-be-displayed data blocks that are removed from the M to-be-displayed data blocks, only the backlight sources corresponding to the N to-be-displayed data blocks that are removed from the M to-be-displayed data blocks need to be controlled, and the data is displayed according to the to-be-displayed parameters after display analysis. Here, since the parameter to be displayed after the display analysis is already in accordance with the target display parameter, no adjustment is required.
Here, when the area division parameter and the target display parameter are stored in the backlight template, the target display parameter is specifically: when the brightness parameter, and/or the contrast parameter, and/or the color parameter are/is determined, in step 102, performing display analysis on the M data blocks to be displayed specifically includes: and performing display analysis on the M data blocks to be displayed according to the brightness parameter, the contrast parameter and the color parameter, wherein M is an integer greater than or equal to two. So that in the subsequent step 103, the target backlight display for controlling the area of the display area where the backlight source is located can be realized. Wherein, the target backlight display refers to the brightness, contrast and color of the areas where different LED backlights are located.
103, controlling the backlight sources corresponding to the N data blocks to be displayed to display according to the N target display parameters; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize the target backlight display of the area where the backlight sources are located in the area control display area.
Here, the N data blocks to be displayed are data blocks to be displayed corresponding to the N target display parameters.
In step 103, taking the display device as an LED backlight as an example for explanation, the area control method for implementing area control includes the following several cases.
In the first case, the zone control method includes: and controlling the whole display picture area.
Specifically, at this time, the division granularity of the display screen is equal to or greater than the number of LEDs. That is, more than one LED may be divided into the same analysis area, so that the LEDs in one area can be uniformly controlled. Therefore, the invention realizes the control of the whole display picture area and has good compatibility with the prior art.
In a second case, the zone control method includes: and controlling the pixel points in the region. Therefore, the invention realizes the control of the pixel points in the divided regions, namely the control of the single LED in the whole panel, and can accurately improve the display effect of the picture.
In a third case, the zone control method includes: and controlling according to the content of the read video frame or picture. Taking a video frame as an example, region control is performed on a targeted basis according to the content of the read video frame, such as a movie or a picture. Thus, the invention can obtain the best picture display effect.
The following is a specific implementation procedure of an embodiment of the present invention.
As shown in fig. 4, in the present embodiment, the method for controlling the LED backlight includes the following steps:
Here, if a video is read in, it is one video frame.
And step 204, performing optical analysis on the sub-picture according to the brightness parameter in the backlight template.
And step 206, displaying the whole picture, and simultaneously respectively controlling different LED backlight areas by using the analysis result.
As shown in fig. 5, a system for controlling a backlight of a display device includes: an acquisition unit 1, a dividing unit 2, an analysis unit 3 and a control unit 4.
The obtaining unit 1 is configured to obtain data to be displayed, obtain a display area division parameter, and obtain a target display parameter. The dividing unit 2 is configured to divide the data to be displayed into M data blocks to be displayed according to the display area dividing parameter after receiving the data to be displayed and the display area dividing parameter from the obtaining unit 1. The analysis unit 3 is used for receiving the M data blocks to be displayed from the dividing unit 2, and performing display analysis on the M data blocks to be displayed after receiving the target display parameters from the acquisition unit 1, so as to correspondingly obtain M parameters to be displayed; and detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters. The control unit 4 is configured to receive the N to-be-displayed parameters from the analysis unit 3, and control the backlight sources corresponding to the N to-be-displayed data blocks to display according to the N target display parameters after receiving the target display parameters from the acquisition unit 1; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize the target backlight display of the area where the backlight sources are located in the area control display area.
Here, the display area division parameter is specifically a picture area division manner; the dividing unit 2 is further configured to perform area division on the data to be displayed according to a picture area division manner, and divide the data to be displayed into M data blocks to be displayed, where M is an integer greater than or equal to two. The target display parameters are specifically: a brightness parameter, and/or a contrast parameter, and/or a color parameter; the analyzing unit 3 is further configured to perform display analysis on the M data blocks to be displayed according to the brightness parameter, and/or the contrast parameter, and/or the color parameter, where M is an integer greater than or equal to two.
Here, the control unit 4 is further configured to implement a target backlight display of an area where the backlight is located in the area control display area in an area control manner that controls the entire display screen area; or, the target backlight display of the area where the backlight source is located in the display area is controlled by the area in an area control mode for controlling the pixel points in the area; or, the target backlight display of the area where the backlight source is located in the display area is controlled by the area control mode according to the content of the read video frame or picture.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (13)
1. A method of controlling a backlight of a display device, the method comprising the steps of:
presetting display area division parameters and target display parameters;
acquiring data to be displayed, acquiring display area division parameters and acquiring target display parameters; dividing the data to be displayed into M data blocks to be displayed according to the display area division parameters;
performing display analysis on the M data blocks to be displayed, and correspondingly obtaining M parameters to be displayed; detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters;
controlling the backlight sources corresponding to the N data blocks to be displayed to display according to the N target display parameters; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize area control of the target backlight display of the area where the backlight sources are located in the display area.
2. The method of claim 1, wherein the display area division parameter is: parameters for dividing the display device according to the number and arrangement of the backlight sources; the target display parameters are as follows: and displaying the data to be displayed by the display requirement parameters.
3. The method according to claim 2, wherein the display area division parameter is specifically: dividing picture areas; the target display parameters are specifically: a brightness parameter, and/or a contrast parameter, and/or a color parameter.
4. The method according to claim 3, wherein the dividing the data area to be displayed into M data blocks to be displayed according to the display area division parameter specifically comprises: dividing the data to be displayed into M data blocks to be displayed according to the image area division mode, wherein M is an integer greater than or equal to two; and when the display device is a display device of a light-emitting diode (LED) backlight source, the number of the LED lamps is less than or equal to M.
5. The method according to claim 3, wherein the picture region division manner is a non-rectangular division manner.
6. The method according to claim 3, wherein the performing the display analysis on the M data blocks to be displayed specifically comprises: and performing display analysis on the M data blocks to be displayed according to the brightness parameter, the contrast parameter and the color parameter, wherein M is an integer greater than or equal to two.
7. The method according to any one of claims 1 to 6, wherein the zone control comprises: and controlling the whole display picture area.
8. The method according to any one of claims 1 to 6, wherein the zone control comprises: and controlling the pixel points in the region.
9. The method according to any one of claims 1 to 6, wherein the zone control comprises: and controlling according to the content of the read video frame or picture.
10. A system for controlling a backlight of a display device, the system comprising: the device comprises an acquisition unit, a dividing unit, an analysis unit and a control unit; wherein,
the device comprises an acquisition unit, a display unit and a display unit, wherein the acquisition unit is used for acquiring data to be displayed, acquiring preset display area division parameters and acquiring preset target display parameters;
the dividing unit is used for dividing the data to be displayed into M data blocks to be displayed according to the display area dividing parameters after the data to be displayed and the display area dividing parameters are received from the acquiring unit;
the analysis unit is used for receiving the M data blocks to be displayed from the dividing unit, and performing display analysis on the M data blocks to be displayed after receiving the target display parameters from the acquisition unit, so as to correspondingly obtain M parameters to be displayed; detecting and acquiring N to-be-displayed parameters which do not meet the target display parameters from the M to-be-displayed parameters;
the control unit is used for receiving the N to-be-displayed parameters from the analysis unit and controlling the backlight sources corresponding to the N to-be-displayed data blocks to display according to the N target display parameters after receiving the target display parameters from the acquisition unit; and controlling the backlight sources corresponding to the N data blocks to be displayed, which are removed from the M data blocks to be displayed, and displaying according to the display-analyzed parameters to be displayed so as to realize area control of the target backlight display of the area where the backlight sources are located in the display area.
11. The system according to claim 10, wherein the display area division parameter is a frame area division manner; the dividing unit is further configured to perform area division on the data to be displayed according to the picture area dividing manner, and divide the data to be displayed into M data blocks to be displayed, where M is an integer greater than or equal to two.
12. The system according to claim 10, wherein the target display parameters are specifically: a brightness parameter, and/or a contrast parameter, and/or a color parameter; the analysis unit is further configured to perform display analysis on the M data blocks to be displayed according to the brightness parameter, and/or the contrast parameter, and/or the color parameter, where M is an integer greater than or equal to two.
13. The system according to claim 10, wherein the control unit is further configured to perform area control for controlling an area of the display screen to achieve a target backlight display in which the backlight source is located in the display area; or,
the target backlight display of the area where the backlight source is located in the display area is controlled by the area in an area control mode of controlling the pixel points in the area; or,
and realizing the target backlight display of the area where the backlight source is located in the area control display area in an area control mode of controlling according to the content of the read video frame or picture.
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| KR101603242B1 (en) * | 2009-12-07 | 2016-03-15 | 엘지디스플레이 주식회사 | Division method of display area for local dimming and liquid crystal display device using the same and driving method thereof |
| CN102087836A (en) * | 2010-04-13 | 2011-06-08 | Tcl集团股份有限公司 | Liquid crystal display system and image display method thereof |
| CN103021348A (en) * | 2012-12-28 | 2013-04-03 | 东莞宇龙通信科技有限公司 | Display device and screen backlight control method |
| CN104346049A (en) * | 2013-07-29 | 2015-02-11 | 联想(北京)有限公司 | Display control method and electronic equipment |
| CN106952630A (en) * | 2017-03-23 | 2017-07-14 | 深圳市茁壮网络股份有限公司 | Pixel region processing method, device and pixel region switching method and apparatus |
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| WO2006045424A1 (en) * | 2004-10-26 | 2006-05-04 | Sony Ericsson Mobile Communications Ab | Backlight unit for display device |
| CN1797082A (en) * | 2004-12-30 | 2006-07-05 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and its driving method |
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| WO2006045424A1 (en) * | 2004-10-26 | 2006-05-04 | Sony Ericsson Mobile Communications Ab | Backlight unit for display device |
| CN1797082A (en) * | 2004-12-30 | 2006-07-05 | Lg.菲利浦Lcd株式会社 | Liquid crystal display device and its driving method |
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