CN104538002A - Control method and device of direct-illumination-type backlight source and display device - Google Patents

Control method and device of direct-illumination-type backlight source and display device Download PDF

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CN104538002A
CN104538002A CN201510029004.7A CN201510029004A CN104538002A CN 104538002 A CN104538002 A CN 104538002A CN 201510029004 A CN201510029004 A CN 201510029004A CN 104538002 A CN104538002 A CN 104538002A
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described
displayed
aspect ration
display
image
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CN201510029004.7A
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Chinese (zh)
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CN104538002B (en
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浩育涛
吕金库
郭俊杰
李响
王伯长
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京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Abstract

The invention discloses a control method and device of a direct-illumination-type backlight source and a display device, relating to the technical field of display and aiming at solving the problem of electric energy waste caused by the direct-illumination-type backlight source. The control method of the direct-illumination-type backlight source comprises the steps of acquiring aspect ratio signals of images to be displayed; confirming target non-display regions on a liquid crystal display according to the aspect ratio signals of the images to be displayed and preset display corresponding relations, wherein the display corresponding relations are corresponding relations between the aspect ratio signals of different display images and the non-display regions, and the target non-display regions are non-display regions, corresponding to the aspect ratio signals of the images to be displayed, on the liquid crystal display; and turning off all light sources corresponding to the target non-display regions in the direct-illumination-type backlight source. The invention also provides the control device of the direct-illumination-type backlight source and the display device. According to the technical scheme provided by the invention, the electric energy consumed by the direct-illumination-type backlight source is saved.

Description

A kind of control method of direct-light-type backlight, control device and display device

Technical field

The present invention relates to display technique field, particularly relate to a kind of control method of direct-light-type backlight, control device and display device.

Background technology

Because liquid crystal display belongs to the display device of non-self luminescence, therefore needing backlight to provide light source for liquid crystal display, by controlling the liquid crystal deflection in liquid crystal display, just can realize the picture display of liquid crystal display.Backlight is divided into direct-light-type backlight and side-edge type backlight according to light inlet mode, and at present, large scale becomes the new trend of liquid crystal display development, and large-sized liquid crystal display generally adopts direct-light-type backlight to provide light source for liquid crystal display.

But, the image to be displayed shown on a liquid crystal display is needed to have multiple aspect ration, when the aspect ration of image to be displayed is different with the aspect ration of liquid crystal display, the image peripheral gone out shown by liquid crystal display there will be black ribbon region, these Shi Fei display image area, black ribbon region; But direct-light-type backlight multiple light sources corresponding with black ribbon region are still at normal luminous, so cause direct-light-type backlight waste electric energy.

Summary of the invention

The object of the present invention is to provide a kind of control method of direct-light-type backlight, control device and display device, for saving the electric energy that direct-light-type backlight consumes.

To achieve these goals, the invention provides following technical scheme:

On the one hand, the invention provides a kind of control method of direct-light-type backlight, comprising:

Obtain the aspect ration signal of image to be displayed;

According to the aspect ration signal of described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, described display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and described target non-display area is the non-display area in liquid crystal display that the aspect ration signal of described image to be displayed is corresponding;

Close each light source corresponding with described target non-display area in described direct-light-type backlight.

Further, when the aspect ration of described liquid crystal display is 4:3; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 16:9 or 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 21:9 of described image to be displayed.

Further, when the aspect ration of liquid crystal display is 16:9; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.

Further, when the aspect ration of liquid crystal display is 21:9; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 or 16:9 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 4:3 of described image to be displayed.

On the one hand, the invention provides a kind of control device of direct-light-type backlight, comprising:

Acquisition module, for obtaining the aspect ration signal of image to be displayed;

Determination module, for the aspect ration signal according to described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, described display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and described target non-display area is the non-display area in liquid crystal display that the aspect ration signal of described image to be displayed is corresponding;

Execution module, for closing each light source corresponding with described target non-display area in described direct-light-type backlight.

Further, when the aspect ration of described liquid crystal display is 4:3; Described determination module is for when described in the aspect ration signal designation when described image to be displayed, the aspect ration of image to be displayed is 16:9 or 21:9, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 21:9 of described image to be displayed.

Further, when the aspect ration of described liquid crystal display is 16:9; According to described display corresponding relation, described determination module, for when the aspect ration of image to be displayed is 4:3 described in the aspect ration signal designation when described image to be displayed, determines that described target non-display area is positioned at the left and right sides of described liquid crystal display; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.

Further, when the aspect ration of described liquid crystal display is 21:9; Described determination module is for when described in the aspect ration signal designation when described image to be displayed, the aspect ration of image to be displayed is 4:3 or 16:9, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 4:3 of described image to be displayed.

On the one hand, the invention provides a kind of display device, comprise liquid crystal display, and provide backlight for described liquid crystal display and be subject to the direct-light-type backlight that the control method described in technique scheme controls.

When adopting the control method of direct-light-type backlight provided by the invention to control direct-light-type backlight, when the aspect ration of liquid crystal display is different with the aspect ration of image to be displayed, control device is according to the aspect ration signal of the image to be displayed obtained, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, namely the black ribbon region in liquid crystal display, and close each light source corresponding with target non-display area in direct-light-type backlight, make light source corresponding with target non-display area in direct-light-type backlight not for target non-display area provides backlight, therefore, compared with each light source luminescence always corresponding with target non-display area in prior art, considerably reduce power consumption, namely the electric energy that direct-light-type backlight consumes is saved.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the process flow diagram of the control method of direct-light-type backlight in the embodiment of the present invention;

Fig. 2 is the process flow diagram of a kind of specific implementation of the control method of direct-light-type backlight in the embodiment of the present invention;

Fig. 3 is the schematic diagram of the target non-display area described in employing Fig. 2 during control method in liquid crystal display;

Fig. 4 is the process flow diagram of the another kind of specific implementation of the control method of direct-light-type backlight in the embodiment of the present invention;

Fig. 5 is the schematic diagram one of the target non-display area described in employing Fig. 4 during control method in liquid crystal display;

Fig. 6 is the schematic diagram two of the target non-display area described in employing Fig. 4 during control method in liquid crystal display;

Fig. 7 is the process flow diagram of another specific implementation of the control method of a kind of direct-light-type backlight in the embodiment of the present invention;

Fig. 8 is the schematic diagram of the target non-display area described in employing Fig. 7 during control method in liquid crystal display;

Fig. 9 is the structural representation of the control device of direct-light-type backlight in the embodiment of the present invention;

Figure 10 is the structural representation of display device in the embodiment of the present invention.

Reference numeral:

60-display device, 61-liquid crystal display,

62-direct-light-type backlight.

Embodiment

In order to further illustrate the control method of the direct-light-type backlight that the embodiment of the present invention provides, control device and display device, be described in detail below in conjunction with Figure of description.

Refer to Fig. 1, the control method of the direct-light-type backlight that the embodiment of the present invention provides comprises:

The aspect ration signal of step 101, acquisition image to be displayed.Wherein, control device obtains the aspect ration signal of image to be displayed, and the aspect ration of this image to be displayed of aspect ration signal designation of image to be displayed, the aspect ration of common image to be displayed comprises 4:3,16:9 and 21:9.

Step 102, aspect ration signal according to described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display; Wherein, display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and target non-display area is the non-display area in liquid crystal display that the aspect ration signal of image to be displayed is corresponding.Display corresponding relation is stored in advance in control device, when getting the aspect ration signal of image to be displayed, control device can search the non-display area corresponding with the aspect ration signal of image to be displayed in display corresponding relation, and using this non-display area as target non-display area, target non-display area is often black ribbon region, and is positioned at both sides up and down or the left and right sides of liquid crystal display.

It should be noted that, in practical operation, there is the liquid crystal display that multiple aspect ration is different, the aspect ration of common liquid crystal display comprises 4:3,16:9 and 21:9.

Step 103, close each light source corresponding with described target non-display area in described direct-light-type backlight.Wherein, direct-light-type backlight comprises the multiple light sources be in array-like arrangement, and light source is generally light emitting diode (Light Emitting Diode, hereinafter referred to as LED).When after control device determination target non-display area, close each light source corresponding with target non-display area in direct-light-type backlight, keep each light source corresponding with the image shown by liquid crystal display in direct-light-type backlight to be in luminance.

The control method of direct-light-type backlight provided by the invention, liquid crystal display display image to be displayed, when the aspect ration of liquid crystal display is different with the aspect ration of image to be displayed, according to the aspect ration signal of the image to be displayed obtained, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, namely the black ribbon region in liquid crystal display, and close light source corresponding with target non-display area in direct-light-type backlight, light source corresponding with target non-display area in direct-light-type backlight is not for target non-display area provides backlight, thus save the electric energy of direct-light-type backlight consumption

In the control method of the direct-light-type backlight provided at above-described embodiment, according to the aspect ration signal of image to be displayed and the aspect ration of liquid crystal display, by each light source corresponding with target non-display area in direct-light-type backlight is closed to save electric energy; The display image having a different aspect ration for the aspect ration of different liquid crystal display and display below carrys out concrete example and illustrates:

Refer to Fig. 2 and Fig. 3, when the aspect ration of liquid crystal display is 4:3, and the aspect ration of image to be displayed different from the aspect ration of liquid crystal display time, in order to ensure can be complete in liquid crystal display display display image, the control method of direct-light-type backlight specifically comprises:

The aspect ration signal of step 201, acquisition image to be displayed.

Step 202, when described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 16:9 or 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.Wherein, the aspect ration of liquid crystal display is 4:3, when the aspect ration of this image to be displayed of aspect ration signal designation of image to be displayed is 16:9 or 21:9, liquid crystal display there is black ribbon region, i.e. target non-display area, control device is according to the aspect ration signal of image to be displayed, and display corresponding relation determination target non-display area is positioned at the both sides up and down of liquid crystal display.Such as: as shown in Figure 3, the aspect ration of liquid crystal display is 4:3, and when the aspect ration of image to be displayed is 16:9, region A is target non-display area; When the aspect ration of image to be displayed is 21:9, region A and region B is target non-display area.Wherein, due to the difference of the aspect ration of image to be displayed, the width of the target non-display area corresponding to the aspect ration of image to be displayed is also different, the width of the target non-display area of aspect ration corresponding to 16:9 of image to be displayed is less than the width of the target non-display area of aspect ration corresponding to 21:9 of image to be displayed, as shown in Figure 3, the width of the target non-display area of the aspect ration of image to be displayed corresponding to 16:9 (region A) is less than the width of the target non-display area of aspect ration corresponding to 21:9 (region A and region B sum) of image to be displayed.

Step 203, close each light source corresponding with described target non-display area in described direct-light-type backlight.Wherein, control device cuts out each light source corresponding with target non-display area in direct-light-type backlight.Such as: as shown in Figure 3, the aspect ration of liquid crystal display is 4:3, when the aspect ration of image to be displayed is 16:9, close light source corresponding with region A in direct-light-type backlight, light source corresponding with region B and region C in direct-light-type backlight still keeps luminance; When the aspect ration of image to be displayed is 21:9, close light source corresponding with region A and region B in direct-light-type backlight, light source corresponding with region C in direct-light-type backlight still keeps luminance.

Refer to Fig. 4, Fig. 5 and Fig. 6, when the aspect ration of liquid crystal display is 16:9, and the aspect ration of image to be displayed different from the aspect ration of liquid crystal display time, in order to ensure that display that can be complete in liquid crystal display shows image, the control method of the direct-light-type backlight that the embodiment of the present invention provides specifically comprises:

The aspect ration signal of step 301, acquisition image to be displayed.

Step 302, when described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation.Wherein, the aspect ration of liquid crystal display is 16:9, when the aspect ration of this image to be displayed of aspect ration signal designation of image to be displayed is 4:3, liquid crystal display there is black ribbon region, i.e. target non-display area, control device is according to the aspect ration signal of image to be displayed, and display corresponding relation determination target non-display area is positioned at the left and right sides of liquid crystal display.Such as: as shown in Figure 5, the aspect ration of liquid crystal display is 16:9, and when the aspect ration of image to be displayed is 4:3, region D is target non-display area.

Step 303, when described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.Wherein, the aspect ration of liquid crystal display is 16:9, when the aspect ration of this image to be displayed of aspect ration signal designation of image to be displayed is 21:9, liquid crystal display there is black ribbon region, i.e. target non-display area, control device is according to the aspect ration signal of image to be displayed, and display corresponding relation determination target non-display area is positioned at the both sides up and down of liquid crystal display.Such as: as shown in Figure 6, the aspect ration of liquid crystal display is 16:9, and when the aspect ration of image to be displayed is 21:9, region F is target non-display area.

Step 304, close each light source corresponding with described target non-display area in described direct-light-type backlight.Wherein, control device cuts out each light source corresponding with target non-display area in direct-light-type backlight.Such as: as shown in Figure 5, the aspect ration of liquid crystal display is 16:9, and when the aspect ration of image to be displayed is 4:3, close light source corresponding with region D in direct-light-type backlight, light source corresponding with region E in direct-light-type backlight still keeps luminance; As shown in Figure 6, when the aspect ration of image to be displayed is 21:9, region F is target non-display area, and close light source corresponding with region F in direct-light-type backlight, light source corresponding with region G in direct-light-type backlight still keeps luminance.

Refer to Fig. 7 and Fig. 8, when the aspect ration of liquid crystal display is 21:9, and the aspect ration of image to be displayed different from the aspect ration of liquid crystal display time, in order to ensure that display that can be complete in liquid crystal display shows image, the control method of the direct-light-type backlight that the embodiment of the present invention provides specifically comprises:

The aspect ration signal of step 401, acquisition image to be displayed.

Step 402, when described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 or 16:9 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation.Wherein, the aspect ration of liquid crystal display is 21:9, when the aspect ration of this image to be displayed of aspect ration signal designation of image to be displayed is 4:3 or 16:9, liquid crystal display there is black ribbon region, i.e. target non-display area, control device is according to the aspect ration signal of image to be displayed, and display corresponding relation determination target non-display area is positioned at the both sides up and down of liquid crystal display.Such as: as shown in Figure 8, the aspect ration of liquid crystal display is 21:9, and when the aspect ration of image to be displayed is 16:9, region H is target non-display area; When the aspect ration of image to be displayed is 4:3, region H and region I is target non-display area.Wherein, the width of the target non-display area of aspect ration corresponding to 16:9 of image to be displayed is less than the width of the target non-display area of aspect ration corresponding to 4:3 of image to be displayed, such as, the width of the target non-display area of the aspect ration of image to be displayed corresponding to 16:9 (region H) is less than the width of the target non-display area of aspect ration corresponding to 4:3 (region H and region I sum) of image to be displayed.

Step 403, close each light source corresponding with described target non-display area in described direct-light-type backlight.Wherein, control device cuts out each light source corresponding with target non-display area in direct-light-type backlight.Such as: as shown in Figure 8, the aspect ration of liquid crystal display is 21:9, when the aspect ration of image to be displayed is 16:9, close light source corresponding with region H in direct-light-type backlight, light source corresponding with region I and region J in direct-light-type backlight still keeps luminance; When the aspect ration of image to be displayed is 4:3, close light source corresponding with region H and region I in direct-light-type backlight, light source corresponding with region J in direct-light-type backlight still keeps luminance.

It should be noted that, when on the separatrix that light source is in viewing area and target non-display area just, in order to ensure display image integrality on a liquid crystal display, the light source corresponding with the separatrix of target non-display area with viewing area in direct-light-type backlight is kept to be in luminance.

Refer to Fig. 9, the control device of the direct-light-type backlight that the embodiment of the present invention provides comprises:

Acquisition module 501, for obtaining the aspect ration signal of image to be displayed.

Determination module 502, for the aspect ration signal according to described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display.Wherein, display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and target non-display area is the non-display area in liquid crystal display that the aspect ration signal of image to be displayed is corresponding.

Execution module 503, for closing each light source corresponding with described target non-display area in described direct-light-type backlight.

The control device of direct-light-type backlight provided by the invention, liquid crystal display display image to be displayed, when the aspect ration of liquid crystal display is different with the aspect ration of image to be displayed, according to the aspect ration signal of the image to be displayed obtained, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, namely the black ribbon region in liquid crystal display, and close light source corresponding with target non-display area in direct-light-type backlight, light source corresponding with target non-display area in direct-light-type backlight is not for target non-display area provides backlight, thus save the electric energy of direct-light-type backlight consumption.

Concrete, when the aspect ration of liquid crystal display is different with the aspect ration of image to be displayed, in order to ensure the complete display on a liquid crystal display of display image, when the aspect ration of liquid crystal display is 4:3; When determination module 502 is 16:9 or 21:9 for the aspect ration of the aspect ration signal designation image to be displayed when image to be displayed, be positioned at the both sides up and down of liquid crystal display according to display corresponding relation determination target non-display area.Wherein, the width of the target non-display area of the aspect ration of image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 21:9 of image to be displayed.

Concrete, when the aspect ration of liquid crystal display is 16:9; When determination module 502 is 4:3 for the aspect ration of the aspect ration signal designation image to be displayed when image to be displayed, determine that described target non-display area is positioned at the left and right sides of liquid crystal display according to display corresponding relation; When the aspect ration of the aspect ration signal designation image to be displayed of image to be displayed is 21:9, determine that described target non-display area is positioned at the both sides up and down of liquid crystal display according to display corresponding relation.

Concrete, when the aspect ration of liquid crystal display is 21:9; When determination module 502 is 4:3 or 16:9 for the aspect ration of the aspect ration signal designation image to be displayed when image to be displayed, be positioned at the left and right sides of liquid crystal display according to display corresponding relation determination target non-display area.Wherein, the width of the target non-display area of the aspect ration of image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 4:3 of image to be displayed.

For control device embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.

Refer to Figure 10, embodiments provide display device 60, display device 60 comprises liquid crystal display 61, and provides backlight for liquid crystal display 61 and be subject to the direct-light-type backlight 62 that the control method of the direct-light-type backlight in technique scheme controls.

The invention provides a kind of display device 60, liquid crystal display 61 shows image to be displayed, when the aspect ration of liquid crystal display 61 is different with the aspect ration of image to be displayed, according to the aspect ration signal of the image to be displayed obtained, and the display corresponding relation preset, determine the target non-display area in liquid crystal display 61, namely the black ribbon region in liquid crystal display 61, and close light source corresponding with target non-display area in direct-light-type backlight 62, light source corresponding with target non-display area in direct-light-type backlight 62 is not for target non-display area provides backlight, thus save the electric energy of direct-light-type backlight 62 consumption.

Above-mentioned display device 60 can be: any product or parts with Presentation Function such as display panels, Electronic Paper, mobile phone, panel computer, televisor, liquid crystal indicator, notebook computer, digital album (digital photo frame), navigating instrument.

For display device embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.

The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.

Claims (9)

1. a control method for direct-light-type backlight, is characterized in that, comprising:
Obtain the aspect ration signal of image to be displayed;
According to the aspect ration signal of described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, described display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and described target non-display area is the non-display area in liquid crystal display that the aspect ration signal of described image to be displayed is corresponding;
Close each light source corresponding with described target non-display area in described direct-light-type backlight.
2. the control method of direct-light-type backlight according to claim 1, is characterized in that, when the aspect ration of described liquid crystal display is 4:3; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 16:9 or 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 21:9 of described image to be displayed.
3. the control method of direct-light-type backlight according to claim 1, is characterized in that, when the aspect ration of liquid crystal display is 16:9; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.
4. the control method of direct-light-type backlight according to claim 1, is characterized in that, when the aspect ration of liquid crystal display is 21:9; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 4:3 or 16:9 time, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 4:3 of described image to be displayed.
5. a control device for direct-light-type backlight, is characterized in that, comprising:
Acquisition module, for obtaining the aspect ration signal of image to be displayed;
Determination module, for the aspect ration signal according to described image to be displayed, and the display corresponding relation preset, determine the target non-display area in liquid crystal display, described display corresponding relation is the aspect ration signal of different display images and the corresponding relation of non-display area, and described target non-display area is the non-display area in liquid crystal display that the aspect ration signal of described image to be displayed is corresponding;
Execution module, for closing each light source corresponding with described target non-display area in described direct-light-type backlight.
6. the control device of direct-light-type backlight according to claim 5, is characterized in that, when the aspect ration of described liquid crystal display is 4:3; Described determination module is for when described in the aspect ration signal designation when described image to be displayed, the aspect ration of image to be displayed is 16:9 or 21:9, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 21:9 of described image to be displayed.
7. the control device of direct-light-type backlight according to claim 5, is characterized in that, when the aspect ration of described liquid crystal display is 16:9; According to described display corresponding relation, described determination module, for when the aspect ration of image to be displayed is 4:3 described in the aspect ration signal designation when described image to be displayed, determines that described target non-display area is positioned at the left and right sides of described liquid crystal display; When described image to be displayed aspect ration signal designation described in the aspect ration of image to be displayed be 21:9 time, determine that described target non-display area is positioned at the both sides up and down of described liquid crystal display according to described display corresponding relation.
8. the control device of direct-light-type backlight according to claim 5, is characterized in that, when the aspect ration of described liquid crystal display is 21:9; Described determination module is for when described in the aspect ration signal designation when described image to be displayed, the aspect ration of image to be displayed is 4:3 or 16:9, determine that described target non-display area is positioned at the left and right sides of described liquid crystal display according to described display corresponding relation, and the width of the target non-display area of the aspect ration of described image to be displayed corresponding to 16:9 is less than the width of the target non-display area of aspect ration corresponding to 4:3 of described image to be displayed.
9. a display device, is characterized in that, comprising: liquid crystal display, and provides backlight for described liquid crystal display and be subject to the direct-light-type backlight that the control method according to any one of claim 1-4 controls.
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