CN104538002B - A kind of control method of direct-light-type backlight, control device and display device - Google Patents

Abstract

The invention discloses a control method, a control device and a display device of a direct-type backlight source, relates to the field of display technology, and aims to solve the problem of wasting electric energy of the direct-type backlight source. The control method of the direct-lit backlight includes: obtaining an aspect ratio signal of the image to be displayed; determining a target non-display area on the liquid crystal display according to the aspect ratio signal of the image to be displayed and a preset display correspondence relationship, and displaying The corresponding relationship is the corresponding relationship between the aspect ratio signal of different display images and the non-display area, and the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed; Each light source corresponding to the target non-display area. The invention also provides a control device and a display device of a direct-type backlight source. The technical solution provided by the invention is used to save the electric energy consumed by the direct type backlight source.

Description

A control method, control device and display device for a direct-lit backlight

technical field

The invention relates to the field of display technology, in particular to a control method, a control device and a display device of a direct-lit backlight source.

Background technique

Since the liquid crystal display is a non-self-luminous display device, a backlight source is required to provide a light source for the liquid crystal display. By controlling the deflection of the liquid crystal in the liquid crystal display, the screen display of the liquid crystal display can be realized. Backlights are divided into direct-type backlights and side-type backlights according to the way of light input. At present, large-size LCDs have become a new trend in the development of LCDs, and large-size LCDs generally use direct-type backlights to provide light for LCDs.

However, the image to be displayed that needs to be displayed on the liquid crystal display has multiple aspect ratios. When the aspect ratio of the image to be displayed is different from that of the liquid crystal display, black bands will appear around the image displayed on the liquid crystal display. These black strip-shaped areas are non-display image areas; however, the multiple light sources corresponding to the black strip-shaped areas of the direct-lit backlight are still emitting light normally, which causes a waste of electric energy for the direct-lit backlight.

Contents of the invention

The object of the present invention is to provide a control method, a control device and a display device for a direct-type backlight source, which are used to save electric energy consumed by the direct-type backlight source.

In order to achieve the above object, the present invention provides the following technical solutions:

In one aspect, the present invention provides a method for controlling a direct-lit backlight, including:

Obtain the aspect ratio signal of the image to be displayed;

According to the aspect ratio signal of the image to be displayed and the preset display corresponding relationship, determine the target non-display area on the liquid crystal display, and the display corresponding relationship is the aspect ratio signal of different display images and the non-display area Corresponding relationship, the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed;

Turning off each light source corresponding to the target non-display area in the direct-lit backlight source.

Further, when the aspect ratio of the liquid crystal display is 4:3; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 16:9 or 21:9, according to The display correspondence determines that the target non-display area is located on the upper and lower sides of the liquid crystal display, and the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 16:9 is smaller than the width of the target non-display area The aspect ratio of the image is the width of the target non-display area corresponding to 21:9.

Further, when the aspect ratio of the liquid crystal display is 16:9; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3, determine according to the display correspondence The target non-display area is located on the left and right sides of the liquid crystal display; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 21:9, determine according to the display correspondence The target non-display area is located on the upper and lower sides of the liquid crystal display.

Further, when the aspect ratio of the liquid crystal display is 21:9; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3 or 16:9, according to the The display correspondence determines that the target non-display area is located on the left and right sides of the liquid crystal display, and the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 16:9 is smaller than that of the image to be displayed The width of the target non-display area corresponding to the aspect ratio of 4:3.

In one aspect, the present invention provides a control device for a direct-lit backlight, including:

An acquisition module, configured to acquire an aspect ratio signal of an image to be displayed;

A determining module, configured to determine a target non-display area on the liquid crystal display according to the aspect ratio signal of the image to be displayed and a preset display correspondence, the display correspondence being the aspect ratio signal of different display images The corresponding relationship with the non-display area, the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed;

An execution module, configured to turn off each light source corresponding to the target non-display area in the direct-lit backlight.

Further, when the aspect ratio of the liquid crystal display is 4:3; the determination module is configured to indicate that the aspect ratio of the image to be displayed is 16:9 or When 21:9, according to the display correspondence, it is determined that the target non-display area is located on the upper and lower sides of the liquid crystal display, and the aspect ratio of the image to be displayed is that of the target non-display area corresponding to 16:9. The width is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed being 21:9.

Further, when the aspect ratio of the liquid crystal display is 16:9; the determination module is used for when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3 determining that the target non-display area is located on the left and right sides of the liquid crystal display according to the display correspondence; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 21:9 and determining, according to the display correspondence, that the target non-display area is located on the upper and lower sides of the liquid crystal display.

Further, when the aspect ratio of the liquid crystal display is 21:9; the determining module is configured to indicate that the aspect ratio of the image to be displayed is 4:3 or When 16:9, according to the display correspondence, it is determined that the target non-display area is located on the left and right sides of the liquid crystal display, and the aspect ratio of the image to be displayed is that of the target non-display area corresponding to 16:9. The width is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed being 4:3.

In one aspect, the present invention provides a display device, including a liquid crystal display, and a direct backlight source that provides a backlight for the liquid crystal display and is controlled by the control method described in the above technical solution.

When using the direct-type backlight control method provided by the present invention to control the direct-type backlight, when the aspect ratio of the liquid crystal display is different from the aspect ratio of the image to be displayed, the control device according to the acquired aspect ratio signal of the image to be displayed , and the preset display corresponding relationship, determine the target non-display area on the liquid crystal display, that is, the black band-shaped area on the liquid crystal display, and turn off the light sources corresponding to the target non-display area in the direct-lit backlight, so that the direct-lit backlight The light source corresponding to the target non-display area in the source does not provide backlight for the target non-display area. Therefore, compared with the light sources corresponding to the target non-display area in the prior art, the power consumption is significantly reduced, that is, direct lighting is saved. power consumed by the backlight.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a flow chart of a method for controlling a direct-lit backlight in an embodiment of the present invention;

FIG. 2 is a flow chart of a specific implementation of a method for controlling a direct-lit backlight in an embodiment of the present invention;

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

FIG. 4 is a flow chart of another specific implementation of the direct-lit backlight control method in the embodiment of the present invention;

Fig. 5 is a schematic diagram 1 of the target non-display area on the liquid crystal display when the control method described in Fig. 4 is adopted;

Fig. 6 is a schematic diagram 2 of the target non-display area on the liquid crystal display when the control method described in Fig. 4 is adopted;

FIG. 7 is a flow chart of another specific implementation of a direct-lit backlight control method in an embodiment of the present invention;

Fig. 8 is a schematic diagram of the target non-display area on the liquid crystal display when the control method described in Fig. 7 is adopted;

9 is a schematic structural view of a control device for a direct-lit backlight in an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a display device in an embodiment of the present invention.

Reference signs:

60-display device, 61-liquid crystal display,

62-direct type backlight.

detailed description

In order to further illustrate the control method, control device and display device of the direct-lit backlight provided by the embodiments of the present invention, a detailed description will be given below in conjunction with the accompanying drawings.

Please refer to Fig. 1, the control method of the direct type backlight provided by the embodiment of the present invention includes:

Step 101. Obtain an aspect ratio signal of an image to be displayed. Wherein, the control device obtains the aspect ratio signal of the image to be displayed, and the aspect ratio signal of the image to be displayed indicates the aspect ratio of the image to be displayed. Common aspect ratios of the image to be displayed include 4:3, 16:9 and 21:9.

Step 102: Determine the target non-display area on the liquid crystal display according to the aspect ratio signal of the image to be displayed and the preset display corresponding relationship; The corresponding relationship of the display area, the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed. The display correspondence is pre-stored in the control device, and when the aspect ratio signal of the image to be displayed is obtained, the control device can search for the non-display area corresponding to the aspect ratio signal of the image to be displayed in the display correspondence, and The non-display area is used as the target non-display area, and the target non-display area is often a black strip-shaped area, and is located on the upper and lower sides or the left and right sides of the liquid crystal display.

It should be noted that in actual operation, there are various liquid crystal displays with different aspect ratios, and the aspect ratios of common liquid crystal displays include 4:3, 16:9 and 21:9.

Step 103 , turning off each light source corresponding to the target non-display area in the direct-lit backlight source. Wherein, the direct type backlight includes a plurality of light sources arranged in an array, and the light sources are generally light emitting diodes (Light Emitting Diode, hereinafter referred to as LED). After the control device determines the target non-display area, it turns off each light source corresponding to the target non-display area in the direct-type backlight, and keeps each light source in the direct-type backlight corresponding to the image displayed by the liquid crystal display in a light-emitting state.

According to the control method of the direct type backlight provided by the present invention, the liquid crystal display displays the image to be displayed, and when the aspect ratio of the liquid crystal display is different from that of the image to be displayed, according to the acquired aspect ratio signal of the image to be displayed, and The preset display corresponding relationship determines the target non-display area on the liquid crystal display, that is, the black band-shaped area on the liquid crystal display, and turns off the light source corresponding to the target non-display area in the direct-lit backlight. The light source corresponding to the non-display area does not provide backlight for the target non-display area, thus saving the power consumed by the direct-lit backlight

In the method for controlling the direct-type backlight provided by the above-mentioned embodiment, according to the aspect ratio signal of the image to be displayed and the aspect ratio of the liquid crystal display, each light source corresponding to the target non-display area in the direct-type backlight is turned off. Save power; the following is a specific example for different aspect ratios of liquid crystal displays and displaying images with different aspect ratios:

Please refer to Figure 2 and Figure 3, when the aspect ratio of the liquid crystal display is 4:3, and the aspect ratio of the image to be displayed is different from that of the liquid crystal display, in order to ensure that the displayed image can be completely displayed on the liquid crystal display, The control method of the direct type backlight specifically includes:

Step 201. Obtain an aspect ratio signal of an image to be displayed.

Step 202: When the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 16:9 or 21:9, determine according to the display correspondence that the target non-display area is located in the The upper and lower sides of the LCD display. Wherein, the aspect ratio of the liquid crystal display is 4:3, when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 16:9 or 21:9, a black band-shaped area appears on the liquid crystal display, That is, the target non-display area. The control device determines that the target non-display area is located on the upper and lower sides of the liquid crystal display according to the aspect ratio signal of the image to be displayed and the corresponding display relationship. For example: as shown in Figure 3, the aspect ratio of the liquid crystal display is 4:3, when the aspect ratio of the image to be displayed is 16:9, area A is the target non-display area; when the aspect ratio of the image to be displayed is At 21:9, area A and area B are the target non-display areas. Wherein, because the aspect ratio of the image to be displayed is different, the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is also different, and the aspect ratio of the image to be displayed is the target non-display area corresponding to 16:9 The width of the image to be displayed is smaller than the width of the target non-display area corresponding to the aspect ratio of 21:9, as shown in Figure 3, the aspect ratio of the image to be displayed is 16:9 corresponding to the target non-display area (area The width of A) is smaller than the width of the target non-display area (the sum of area A and area B) corresponding to the aspect ratio of the image to be displayed being 21:9.

Step 203 , turning off each light source corresponding to the target non-display area in the direct-lit backlight source. Wherein, the control device turns off each light source corresponding to the target non-display area in the direct-lit backlight source. For example: as shown in Figure 3, the aspect ratio of the liquid crystal display is 4:3. When the aspect ratio of the image to be displayed is 16:9, turn off the light source corresponding to area A in the direct-type backlight, and the direct-type backlight The light sources corresponding to area B and area C still remain in the light-emitting state; when the aspect ratio of the image to be displayed is 21:9, turn off the light sources corresponding to area A and area B in the direct type backlight, and the direct type backlight The light source corresponding to area C still maintains a light-emitting state.

Please refer to Figure 4, Figure 5 and Figure 6, when the aspect ratio of the LCD is 16:9, and the aspect ratio of the image to be displayed is different from that of the LCD, in order to ensure that the LCD can completely display To display an image, the direct-lit backlight control method provided by the embodiment of the present invention specifically includes:

Step 301. Obtain an aspect ratio signal of an image to be displayed.

Step 302, when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3, determine according to the display correspondence that the target non-display area is located on the left and right of the liquid crystal display sides. Wherein, the aspect ratio of the liquid crystal display is 16:9, when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3, a black band-shaped area appears on the liquid crystal display, that is, the object is not displayed area, the control device determines that the target non-display area is located on the left and right sides of the liquid crystal display according to the aspect ratio signal of the image to be displayed and the display correspondence. For example, as shown in FIG. 5 , the aspect ratio of the liquid crystal display is 16:9, and when the aspect ratio of the image to be displayed is 4:3, the area D is the target non-display area.

Step 303: When the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 21:9, determine according to the display correspondence that the target non-display area is located above and below the liquid crystal display sides. Wherein, the aspect ratio of the liquid crystal display is 16:9, when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 21:9, a black band-shaped area appears on the liquid crystal display, that is, the object is not displayed area, the control device determines that the target non-display area is located on the upper and lower sides of the liquid crystal display according to the aspect ratio signal of the image to be displayed and the display correspondence. For example: as shown in FIG. 6 , the aspect ratio of the liquid crystal display is 16:9, and when the aspect ratio of the image to be displayed is 21:9, the area F is the target non-display area.

Step 304 , turning off each light source corresponding to the target non-display area in the direct-lit backlight source. Wherein, the control device turns off each light source corresponding to the target non-display area in the direct-lit backlight source. For example: as shown in Figure 5, the aspect ratio of the liquid crystal display is 16:9. When the aspect ratio of the image to be displayed is 4:3, turn off the light source corresponding to area D in the direct-type backlight, and the direct-type backlight The light source corresponding to the area E in the figure still keeps the light-emitting state; as shown in Figure 6, when the aspect ratio of the image to be displayed is 21:9, the area F is the target non-display area, and it corresponds to the area F in the direct-lit backlight The light source corresponding to the region G in the direct-lit backlight still maintains a light emitting state.

Please refer to Figure 7 and Figure 8, when the aspect ratio of the liquid crystal display is 21:9, and the aspect ratio of the image to be displayed is different from that of the liquid crystal display, in order to ensure that the displayed image can be completely displayed on the liquid crystal display, The control method of the direct type backlight provided by the embodiment of the present invention specifically includes:

Step 401. Obtain an aspect ratio signal of an image to be displayed.

Step 402: When the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3 or 16:9, determine that the target non-display area is located in the The left and right sides of the LCD display. Wherein, the aspect ratio of the liquid crystal display is 21:9, when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3 or 16:9, a black band-shaped area appears on the liquid crystal display, That is, the target non-display area. The control device determines that the target non-display area is located on the upper and lower sides of the liquid crystal display according to the aspect ratio signal of the image to be displayed and the corresponding display relationship. For example: as shown in Figure 8, the aspect ratio of the liquid crystal display is 21:9, when the aspect ratio of the image to be displayed is 16:9, the area H is the target non-display area; when the aspect ratio of the image to be displayed is At 4:3, area H and area I are the target non-display areas. Wherein, the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 4:3, for example, the width of the target non-display area corresponding to the image to be displayed The width of the target non-display area (area H) corresponding to the aspect ratio of 16:9 is smaller than the width of the target non-display area (the sum of area H and area I) corresponding to the aspect ratio of the image to be displayed of 4:3 .

Step 403 , turning off each light source corresponding to the target non-display area in the direct-lit backlight source. Wherein, the control device turns off each light source corresponding to the target non-display area in the direct-lit backlight source. For example: as shown in Figure 8, the aspect ratio of the liquid crystal display is 21:9. When the aspect ratio of the image to be displayed is 16:9, turn off the light source corresponding to area H in the direct-type backlight, and the direct-type backlight The light sources corresponding to areas I and J in the direct-lit backlight remain in the luminous state; when the aspect ratio of the image to be displayed is 4:3, turn off the light sources corresponding to the areas H and I in the direct-lit backlight, and the direct-lit backlight The light source corresponding to the area J still maintains the light emitting state.

It should be noted that when the light source is just on the boundary line between the display area and the target non-display area, in order to ensure the integrity of the displayed image on the liquid crystal display, the separation between the display area and the target non-display area in the direct-lit backlight is maintained. The light source corresponding to the boundary line is in the glowing state.

Please refer to Fig. 9, the control device of the direct type backlight provided by the embodiment of the present invention includes:

An acquisition module 501, configured to acquire an aspect ratio signal of an image to be displayed.

The determination module 502 is configured to determine a target non-display area on the liquid crystal display according to the aspect ratio signal of the image to be displayed and a preset display correspondence. The display correspondence is the correspondence between the aspect ratio signals of different displayed images and the non-display area, and the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed.

The execution module 503 is configured to turn off each light source corresponding to the target non-display area in the direct-lit backlight source.

In the control device of the direct type backlight provided by the present invention, the liquid crystal display displays the image to be displayed, and when the aspect ratio of the liquid crystal display is different from that of the image to be displayed, according to the acquired aspect ratio signal of the image to be displayed, and The preset display corresponding relationship determines the target non-display area on the liquid crystal display, that is, the black band-shaped area on the liquid crystal display, and turns off the light source corresponding to the target non-display area in the direct-lit backlight. The light source corresponding to the non-display area does not provide backlight for the target non-display area, thereby saving the power consumed by the direct-lit backlight source.

Specifically, when the aspect ratio of the liquid crystal display is different from the aspect ratio of the image to be displayed, in order to ensure that the displayed image is completely displayed on the liquid crystal display, when the aspect ratio of the liquid crystal display is 4:3; the determining module 502 is used to When the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 16:9 or 21:9, it is determined according to the display correspondence that the target non-display area is located on the upper and lower sides of the liquid crystal display. Wherein, the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 21:9.

Specifically, when the aspect ratio of the liquid crystal display is 16:9; the determination module 502 is used to determine the selected image according to the display correspondence when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 4:3. The target non-display area is located on the left and right sides of the liquid crystal display; when the aspect ratio signal of the image to be displayed indicates that the aspect ratio of the image to be displayed is 21:9, it is determined according to the display correspondence that the target non-display area is located on the liquid crystal display the upper and lower sides.

Specifically, when the aspect ratio of the liquid crystal display is 21:9; the determining module 502 is configured to determine the The corresponding relationship determines that the target non-display area is located on the left and right sides of the liquid crystal display. Wherein, the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 4:3.

As for the embodiment of the control device, since it is basically similar to the embodiment of the method, the description is relatively simple, and for related parts, please refer to the description of the embodiment of the method.

Please refer to FIG. 10 , an embodiment of the present invention provides a display device 60, the display device 60 includes a liquid crystal display 61, and a direct-type backlight that provides a backlight for the liquid crystal display 61 and is controlled by the direct-type backlight control method in the above technical solution 62.

The present invention provides a display device 60. A liquid crystal display 61 displays an image to be displayed. When the aspect ratio of the liquid crystal display 61 is different from that of the image to be displayed, according to the acquired aspect ratio signal of the image to be displayed, and The preset display corresponding relationship determines the target non-display area on the liquid crystal display 61, that is, the black band-shaped area on the liquid crystal display 61, and closes the light source corresponding to the target non-display area in the direct-type backlight source 62, and the direct-type backlight source The light source corresponding to the target non-display area in 62 does not provide backlight for the target non-display area, thereby saving the electric energy consumed by the direct type backlight source 62 .

The above-mentioned display device 60 may be any product or component with a display function such as a liquid crystal display panel, electronic paper, mobile phone, tablet computer, television, liquid crystal display device, notebook computer, digital photo frame, and navigator.

As for the embodiment of the display device, since it is basically similar to the embodiment of the method, the description is relatively simple, and for related parts, please refer to part of the description of the embodiment of the method.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. A method for controlling a direct-type backlight source, comprising: Obtain the aspect ratio signal of the image to be displayed; According to the aspect ratio signal of the image to be displayed and the preset display corresponding relationship, determine the target non-display area on the liquid crystal display, and the display corresponding relationship is the aspect ratio signal of different display images and the non-display area Corresponding relationship, the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed; Turning off each light source corresponding to the target non-display area in the direct-lit backlight source. 2. The control method of the direct type backlight source according to claim 1, wherein when the aspect ratio of the liquid crystal display is 4:3; when the aspect ratio signal of the image to be displayed indicates the When the aspect ratio of the image to be displayed is 16:9 or 21:9, it is determined according to the display correspondence that the target non-display area is located on the upper and lower sides of the liquid crystal display, and the aspect ratio of the image to be displayed is The width of the target non-display area corresponding to 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed being 21:9. 3. The control method of the direct type backlight source according to claim 1, characterized in that, when the aspect ratio of the liquid crystal display is 16:9; when the aspect ratio signal of the image to be displayed indicates that the image to be displayed When the aspect ratio of the image is 4:3, it is determined according to the display correspondence that the target non-display area is located on the left and right sides of the liquid crystal display; when the aspect ratio signal of the image to be displayed indicates that the to-be-displayed When the aspect ratio of the image is 21:9, it is determined according to the display correspondence that the target non-display area is located on the upper and lower sides of the liquid crystal display. 4. The control method of the direct type backlight source according to claim 1, characterized in that, when the aspect ratio of the liquid crystal display is 21:9; when the aspect ratio signal of the image to be displayed indicates the image to be displayed When the aspect ratio of the image is 4:3 or 16:9, it is determined according to the display correspondence that the target non-display area is located on the left and right sides of the liquid crystal display, and the aspect ratio of the image to be displayed is 16 The width of the target non-display area corresponding to :9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed being 4:3. 5. A control device for a direct-type backlight source, comprising: An acquisition module, configured to acquire an aspect ratio signal of an image to be displayed; A determining module, configured to determine a target non-display area on the liquid crystal display according to the aspect ratio signal of the image to be displayed and a preset display correspondence, the display correspondence being the aspect ratio signal of different display images The corresponding relationship with the non-display area, the target non-display area is the non-display area on the liquid crystal display corresponding to the aspect ratio signal of the image to be displayed; An execution module, configured to turn off each light source corresponding to the target non-display area in the direct-lit backlight. 6. The control device of the direct-type backlight according to claim 5, wherein when the aspect ratio of the liquid crystal display is 4:3; the determining module is used for when the aspect ratio of the image to be displayed When the aspect ratio signal indicates that the aspect ratio of the image to be displayed is 16:9 or 21:9, it is determined according to the display correspondence that the target non-display area is located on the upper and lower sides of the liquid crystal display, and the to-be-displayed image The width of the target non-display area corresponding to the aspect ratio of the displayed image is 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed is 21:9. 7. The control device of the direct-type backlight according to claim 5, wherein when the aspect ratio of the liquid crystal display is 16:9; the determining module is used for when the width of the image to be displayed When the aspect ratio signal indicates that the aspect ratio of the image to be displayed is 4:3, it is determined according to the display correspondence that the target non-display area is located on the left and right sides of the liquid crystal display; when the aspect ratio of the image to be displayed is When the aspect ratio signal indicates that the aspect ratio of the image to be displayed is 21:9, it is determined according to the display correspondence that the target non-display area is located on the upper and lower sides of the liquid crystal display. 8. The control device of the direct-type backlight according to claim 5, wherein when the aspect ratio of the liquid crystal display is 21:9; the determining module is used for when the aspect ratio of the image to be displayed When the aspect ratio signal indicates that the aspect ratio of the image to be displayed is 4:3 or 16:9, it is determined according to the display correspondence that the target non-display area is located on the left and right sides of the liquid crystal display, and the to-be-displayed The width of the target non-display area corresponding to the aspect ratio of the displayed image being 16:9 is smaller than the width of the target non-display area corresponding to the aspect ratio of the image to be displayed being 4:3. 9. A display device, characterized by comprising: a liquid crystal display, and a direct backlight source that provides backlight for the liquid crystal display and is controlled by the control method according to any one of claims 1-4.