CN109243386B - Backlight module, display device and control method thereof - Google Patents
Backlight module, display device and control method thereof Download PDFInfo
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- CN109243386B CN109243386B CN201811393439.XA CN201811393439A CN109243386B CN 109243386 B CN109243386 B CN 109243386B CN 201811393439 A CN201811393439 A CN 201811393439A CN 109243386 B CN109243386 B CN 109243386B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention provides a backlight module, a display device and a control method thereof. The backlight module comprises a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units; the backlight driving module is configured to drive the row backlight unit to sequentially emit monochromatic light corresponding to the monochromatic gray scale image according to a preset time sequence when the display panel displays the monochromatic gray scale image row by row so that the display panel displays a color image. By the embodiment of the invention, the light-emitting time of the backlight unit can be prolonged, so that the display brightness is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module, a display device and a control method of the display device.
Background
At present, a color image is displayed in a manner that R, G, B monochrome gray scale images are displayed, and a L CD (L acquired Crystal Display, liquid Crystal Display) with a color film removed is matched to emit monochrome backlight, a frame of color image is divided into three monochrome gray scale images to be displayed, a higher refresh frequency (3 times of a normal frequency) is required when the L CD emits backlight, the time for scanning a line is fixed (such as 1ms) due to a scanning signal of the L CD, the response time of a liquid Crystal is fixed (such as 4ms), and when the refresh frequency of the color image is 60Hz, the refresh frequency of an actual monochrome gray scale image is 180Hz, namely only 5.6ms, namely the light emitting time of the monochrome backlight is about 0.6ms, which is far from supporting the required Display brightness.
Disclosure of Invention
The invention provides a backlight module, a display device and a control method thereof, which aim to solve the problems that the light-emitting time of a monochromatic backlight is short and the brightness requirement cannot be met in the prior art.
In order to solve the above problems, the present invention discloses a backlight module, which includes a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units;
the backlight driving module is configured to drive the row backlight unit to sequentially emit monochromatic light corresponding to the monochromatic gray scale image according to a preset time sequence when the display panel displays the monochromatic gray scale image row by row so that the display panel displays a color image.
Optionally, the backlight driving module is configured to drive an nth row of backlight units of the backlight panel to emit monochromatic light corresponding to the monochromatic grayscale image when the nth row of display units of the display panel displays the monochromatic grayscale image; wherein N is a positive integer.
Optionally, the monochrome grayscale image includes a first grayscale image, a second grayscale image, and a third grayscale image;
the backlight driving module is configured to drive the N-th row of backlight units to emit monochromatic light corresponding to the first gray scale image when the N-th row of display units display the first gray scale image; when the display units in the Nth row display the second gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the second gray scale image; when the display units in the Nth row display unit display the third gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the third gray scale image;
and the Nth row of display units scans the second gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the first gray scale image, and scans the third gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the second gray scale image.
Optionally, the backlight unit comprises a plurality of monochromatic light sources;
the backlight driving module is configured to sequentially drive the monochromatic light sources corresponding to the monochromatic gray scale images in the line backlight unit to emit light according to a preset time sequence when the display panel displays the monochromatic gray scale images in a line-by-line scanning mode.
Optionally, the backlight unit is a direct type RGB light source;
the monochromatic light source is a light emitting diode.
Optionally, the display time of one row of display units is the same as the light emitting time of the corresponding row of backlight units.
The embodiment of the invention also provides a display device, which comprises a display panel, a display driving module and the backlight module;
the backlight module comprises a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units;
the display driving module is configured to drive the display panel to scan and display a monochrome gray scale image line by line according to a preset time sequence;
the backlight driving module is configured to drive the backlight panel to emit monochromatic light corresponding to the monochromatic gray scale image line by line according to the preset time sequence when the display panel displays the monochromatic gray scale image line by line, so that the display panel displays a color image.
The embodiment of the invention also provides a control method of the display device, which is applied to the display device and comprises the following steps:
the display driving module outputs display driving signals according to a preset time sequence, and the backlight driving module outputs backlight driving signals according to the preset time sequence;
the display panel receives the display driving signal and scans and displays a monochrome gray scale image line by line;
the backlight panel receives the backlight driving signal, and sends monochromatic light corresponding to the monochromatic gray scale image line by line when the display panel displays the monochromatic gray scale image line by line.
Optionally, the display panel receives the display driving signal, and displays a monochrome gray scale image by scanning line by line, including:
scanning an Nth row of display units of the display panel, wherein the Nth row of display units respond to and display a first gray-scale image;
scanning the display units in the Nth row when the backlight units in the Nth row of the backlight panel finish lighting corresponding to the first gray scale image, wherein the display units in the Nth row respond to and display a second gray scale image;
scanning the display units in the Nth row when the backlight units in the Nth row finish lighting corresponding to the second gray scale image, wherein the display units in the Nth row respond to and display a third gray scale image;
wherein N is a positive integer.
Optionally, the display panel receives the display driving signal, and displays a monochrome gray scale image by scanning line by line, including:
and scanning the adjacent (N + 1) th row of display units when the N-th row of backlight units emit light corresponding to the first gray scale image.
Compared with the prior art, the invention has the following advantages:
in the embodiment of the invention, the backlight module comprises a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units; when the display panel displays the monochromatic gray-scale images line by line, the backlight driving module drives the line backlight units to sequentially emit monochromatic light corresponding to the monochromatic gray-scale images according to a preset time sequence, so that the display panel displays color images. Compared with the backlight scheme in the prior art, the display unit and the backlight unit are matched for displaying in the embodiment of the invention, so that the light-emitting time of the backlight unit can be prolonged, and the display brightness is improved. Furthermore, the display time of a frame of color image can be compressed, and the refreshing frequency is improved, so that the display effect is improved.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the invention;
fig. 2 is a schematic structural diagram of a display panel according to a first embodiment of the invention;
FIG. 3 is a waveform diagram illustrating a preset timing sequence according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a row of backlight units according to a first embodiment of the present invention;
fig. 5 is a flowchart illustrating steps of a method for controlling a display device according to a third embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Referring to fig. 1, a schematic structural diagram of a backlight module according to an embodiment of the present invention is shown. The backlight module comprises a backlight driving module 11 and a backlight panel 12; the backlight panel 12 is arranged on one side of the display panel 21 departing from the light-emitting surface; the backlight panel 12 has a plurality of rows of backlight units 121, and referring to the structural diagram of the display panel 21 shown in fig. 2, the display panel 21 has a plurality of rows of display units 211, and one row of backlight units 121 corresponds to one row of display units 211;
the backlight driving module 11 is configured to drive the row backlight unit 121 to sequentially emit monochromatic light corresponding to the monochromatic grayscale image according to a preset time sequence when the display panel 21 displays the monochromatic grayscale image row by row, so that the display panel 21 displays a color image.
In this embodiment, the backlight module includes a backlight driving module 11 and a backlight panel 12, the backlight panel 12 has a plurality of rows of backlight units 121, and the backlight driving module 11 drives the backlight panel 12 to emit light. The backlight panel 12 is disposed on a side of the display panel 21 away from the light emitting surface, the display panel 21 has a plurality of rows of display units 211, and each row of display units 211 at least includes a row of pixel units. For example, each row of display cells 211 includes 5 rows of pixel cells. The embodiment of the present invention is not limited in detail, and may be set according to actual situations. The display panel 21 scans and displays the monochrome gray scale image line by line, and when one line of the display units 211 scans the monochrome gray scale image, the corresponding line of the backlight units 121 do not emit light; when displaying a monochrome gray-scale image, the corresponding line backlight unit 121 emits monochrome light corresponding to the monochrome gray-scale image. The backlight units 121 in a row sequentially emit a plurality of monochromatic lights, which are mixed and matched with the monochromatic gray-scale images displayed by the display units 211, so that the display panel 21 displays color images. In the prior art, when the whole display panel 21 displays a monochrome gray scale image, the whole backlight panel 12 simultaneously emits monochrome light corresponding to the monochrome gray scale image, and thus the display panel 21 needs to have a higher refresh frequency, and the light emitting time of the light source in the backlight panel 12 is shorter, which cannot meet the brightness requirement. In the embodiment of the present invention, one row of the display units 211 corresponds to one row of the backlight units 121, each row of the display units 211 sequentially displays the first monochrome gray-scale image, and the corresponding row of the backlight units 121 emits light. Compared with the prior art, the embodiment of the invention leaves a space for prolonging the light-emitting time, thereby improving the light-emitting time of the backlight panel 12 and improving the display brightness.
Optionally, the backlight driving module is configured to drive the nth row of backlight units of the backlight panel 12 to emit monochromatic light corresponding to the monochromatic grayscale image when the nth row of display units of the display panel 21 displays the monochromatic grayscale image; wherein N is a positive integer.
Specifically, referring to fig. 1 and 2, when the nth row of display units scans a monochrome gray scale image, the nth row of backlight units do not emit light; when the display units in the Nth row display unit display the monochrome gray scale image after scanning, the backlight driving module drives the backlight units in the Nth row to emit monochrome light corresponding to the monochrome gray scale image; when the display units in the (N + 1) th row scan the monochromatic gray scale image, the backlight units in the (N + 1) th row do not emit light, and when the display units in the (N + 1) th row display units finish scanning and display the monochromatic gray scale image, the backlight driving module drives the backlight units in the (N + 1) th row to emit monochromatic light corresponding to the monochromatic gray scale image.
Optionally, the monochrome grayscale image includes a first grayscale image, a second grayscale image, and a third grayscale image;
the backlight driving module is configured to drive the N-th row of backlight units to emit monochromatic light corresponding to the first gray scale image when the N-th row of display units display the first gray scale image; when the display units in the Nth row display the second gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the second gray scale image; when the display units in the Nth row display unit display the third gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the third gray scale image;
and the Nth row of display units scans the second gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the first gray scale image, and scans the third gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the second gray scale image.
In this embodiment, the backlight unit 121 may be a direct-type RGB light source, that is, the backlight unit 121 may emit three RGB colors, and the monochrome gray-scale image may include a first gray-scale image, a second gray-scale image and a third gray-scale image respectively corresponding to the three RGB colors. For example, referring to the waveform diagram of the preset timing sequence shown in fig. 3, when the nth row of display units scans the first gray scale image, the nth row of backlight units do not emit light; when the Nth row of display units finishes scanning and displays the first gray scale image, the backlight driving module drives the Nth row of backlight units to emit monochromatic light corresponding to the first gray scale image. And after the N row of backlight units finish lighting, the N row of display units scan the second gray scale image, and the N row of backlight units do not light. When the Nth row of display units finishes scanning and displays the second gray scale image, the backlight driving module drives the Nth row of backlight units to emit monochromatic light corresponding to the second gray scale image. And after the N row of backlight units finish lighting, the N row of display units scan the third gray scale image, and the N row of backlight units do not light. When the Nth row of display units finishes scanning and displays the third gray scale image, the backlight driving module drives the Nth row of backlight units to emit monochromatic light corresponding to the third gray scale image.
Alternatively, referring to the schematic diagram of a row of backlight units shown in fig. 4, the backlight unit 121 includes a plurality of monochromatic light sources;
the backlight driving module is configured to sequentially drive the monochromatic light sources corresponding to the monochromatic gray scale images in the line backlight unit 121 to emit light according to a preset time sequence when the display panel 21 displays the monochromatic gray scale images line by line.
In this embodiment, when the nth row of display units displays the first gray scale image, the backlight driving module drives the monochromatic light source corresponding to the first gray scale image in the nth row of backlight units to emit light, when the nth row of display units displays the second gray scale image, the backlight driving module drives the monochromatic light source corresponding to the second gray scale image in the nth row of backlight units to emit light, when the nth row of display units displays the third gray scale image, the backlight driving module drives the monochromatic light source corresponding to the third gray scale image in the nth row of backlight units to emit light, the monochromatic light source may be a light Emitting Diode (L ED, &tttttranslation = L &ttl &/tt gttt ight-Emitting Diode) in the nth row of backlight units 121, the monochromatic light source may include a red light L ED, a green light L ED, a blue light 34, for example, referring to fig. 1 and L ED., when the nth row of display units displays the first gray scale image, the backlight driving module drives the nth row of display units to drive the N row of backlight units to emit light, and the red light + the backlight driving module drives the nth row of display units to emit light, when the nth row of display units displays the first gray scale image, the N + ED 2, the nth row of display units to display units, the backlight driving module may drive the N + N464 + N rows of the backlight driving unit to emit light Emitting unit to display units to emit light.
Alternatively, the display time of one row of the display units 211 is the same as the light emitting time of the corresponding row of the backlight units 121.
In this embodiment, the display time of the display unit 211 in one row is the same as the light emitting time of the backlight unit 121 in the corresponding row, and the display time and the light emitting time can be set according to actual conditions, so as to lengthen the light emitting time of the backlight unit and improve the display brightness.
In summary, in the embodiment of the invention, the backlight module includes a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units; when the display panel displays the monochromatic gray-scale images line by line, the backlight driving module drives the line backlight units to sequentially emit monochromatic light corresponding to the monochromatic gray-scale images according to a preset time sequence, so that the display panel displays color images. Compared with the backlight scheme in the prior art, the display unit and the backlight unit are matched for displaying in the embodiment of the invention, so that the light-emitting time of the backlight unit can be prolonged, and the display brightness is improved.
Example two
The embodiment of the invention provides a display device. The display device comprises a display panel 21, a display driving module 22, and the backlight module set according to any one of claims 1-6;
the backlight module comprises a backlight driving module 11 and a backlight panel 12; the backlight panel 12 is arranged on one side of the display panel 21 departing from the light-emitting surface; the backlight panel 12 has a plurality of rows of backlight units 121, the display panel 21 has a plurality of rows of display units 211, and one row of backlight units 121 corresponds to one row of display units 211;
the display driving module 22 is configured to drive the display panel 21 to scan and display a monochrome gray scale image line by line according to a preset time sequence;
the backlight driving module 11 is configured to drive the backlight panel 12 to emit monochromatic light corresponding to the monochromatic gray-scale image line by line according to the preset time sequence when the display panel 21 displays the monochromatic gray-scale image line by line, so that the display panel 21 displays a color image.
In this embodiment, the display driving module 22 drives the display panel 21 to scan and display the monochrome gray scale image line by line, and the backlight driving module 11 drives the backlight panel 12 to emit monochrome light corresponding to the monochrome gray scale image line by line. For example, referring to fig. 3, according to a preset timing sequence, when the nth row of display units scans the first gray scale image, the nth row of backlight units does not emit light, and when the nth row of display units finishes scanning the first gray scale image, the nth row of backlight units emits monochromatic light corresponding to the first gray scale image. And when the N row of backlight units finish lighting, the N row of display units scan the second gray scale image. And when the Nth row of display units finishes scanning and displays the second gray scale image, the Nth row of backlight units emit monochromatic light corresponding to the second gray scale image. And when the N row of backlight units finish lighting, the N row of display units scan the third gray-scale image. And when the Nth row of display units finishes scanning and displays the third gray scale image, the Nth row of backlight units emit monochromatic light corresponding to the third gray scale image. When the N row of backlight units finish lighting, the N row of display units repeatedly scan the first gray-scale image. By analogy, each row of the display unit 211 performs scanning display in a cycle, and each row of the backlight unit 121 emits monochromatic light corresponding to a monochromatic grayscale image when the display unit 211 displays the monochromatic grayscale image.
Referring to fig. 3, when the nth row of backlight units emits monochromatic light corresponding to the first gray scale image, the (N + 1) th row of display units scans the first gray scale image, and the (N + 1) th row of backlight units does not emit light. When the (N + 1) th row of display units finishes scanning and displays the first gray scale image, the (N + 1) th row of backlight units emit monochromatic light corresponding to the first gray scale image, the (N + 2) th row of display units scan the first gray scale image, and the (N + 2) th row of backlight units do not emit light. When the display units in the (N + 2) th row display the first gray scale image after scanning, the backlight units in the (N + 3) th row emit monochromatic light corresponding to the first gray scale image. By analogy, the display panel 21 scans downward line by line to display the first grayscale image. The scanning display mode of the second gray scale image and the third gray scale image is the same as that of the first gray scale image.
In summary, in the embodiment of the invention, the display device includes a display panel, a display driving module, and a backlight module; the backlight module comprises a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units; the display driving module is configured to drive the display panel to scan and display the monochrome gray scale image line by line according to a preset time sequence; the backlight driving module is configured to drive the row backlight unit to sequentially emit monochromatic light corresponding to the monochromatic gray-scale image according to a preset time sequence when the display panel displays the monochromatic gray-scale image row by row so as to enable the display panel to display a color image. The display unit and the backlight unit are matched for displaying in the embodiment of the invention, so that the light emitting time of the backlight unit can be prolonged, and the display brightness of the display device is improved.
EXAMPLE III
Referring to fig. 5, a flowchart illustrating steps of a method for controlling a display device according to an embodiment of the present invention is shown. The display device according to embodiment two, the method includes:
In this embodiment, the display device includes a display panel 21, a display driving module 22 and a backlight module. The display panel 21 has a plurality of rows of display units 211, and each row of display units 211 includes at least one row of pixel units. The backlight module includes a backlight driving module 11 and a backlight panel 12, the backlight panel 12 has a plurality of rows of backlight units 121, and one row of backlight units 121 corresponds to one row of display units 211. The display driving module 22 outputs display driving signals according to a preset timing, and the backlight driving module 11 also outputs backlight driving signals according to a preset timing. A synchronization signal is provided between the display driving module 22 and the backlight driving module 11 to ensure that the display driving signal and the backlight driving signal have the same timing.
Step 402, the display panel 21 receives the display driving signal, and displays the monochrome gray scale image by scanning line by line.
In this embodiment, the display panel 21 receives the display driving signal, and performs scanning line by line and displays a monochrome gray-scale image. Scanning the display units in the Nth row of the display panel 21, wherein the display units in the Nth row respond to and display the first gray-scale image; when the lighting of the nth row of backlight units of the backlight panel 12 corresponding to the first gray scale image is finished, scanning the nth row of display units, and responding and displaying a second gray scale image by the nth row of display units; scanning the display units in the Nth row when the backlight units in the Nth row finish lighting corresponding to the second gray scale image, wherein the display units in the Nth row respond to and display a third gray scale image; wherein N is a positive integer. For example, scanning the 1 st row of display units, and the 1 st row of display units responding to and displaying a red gray-scale image; scanning the display units in the 1 st row when the backlight units in the 1 st row emit red light, wherein the display units in the 1 st row respond to and display a green gray-scale image; scanning the display units in the 1 st row when the backlight units in the 1 st row emit green light, and responding and displaying the blue gray-scale image by the display units in the 1 st row; and scanning the red gray-scale image of the next frame for the display unit in the row 1 when the backlight unit in the row 1 emits blue light.
Optionally, when the nth row of backlight units emits light corresponding to the first grayscale image, scanning is performed on the adjacent (N + 1) th row of display units. For example, when the backlight unit of the 1 st row emits red light, the display unit of the 2 nd row is scanned; the display units of row 3 are scanned while the backlight unit of row 2 emits red light. Since the backlight units 121 in one row scan the display units 211 in the adjacent row when emitting light, the scanning display time of the display panel can be saved, thereby increasing the refresh frequency, shortening the display time of a frame of color image, and improving the display effect.
In step 403, the backlight panel 12 receives the backlight driving signal, and emits monochromatic light corresponding to the monochromatic gray scale image line by line when the display panel 21 displays the monochromatic gray scale image by line scanning.
In this embodiment, the backlight panel 12 receives the backlight driving signal, and emits monochromatic light corresponding to the monochromatic gray-scale image line by line when the display panel 21 displays the monochromatic gray-scale image by line scanning. For example, when the display unit in row 1 responds and displays a red gray-scale image, the backlight unit in row 1 emits red light; when the display unit in the 1 st row responds and displays the green gray scale image, the backlight unit in the 1 st row emits green light; when the display unit in the 1 st row responds and displays the blue gray scale image, the backlight unit in the 1 st row emits blue light.
In summary, in the embodiment of the present invention, the display driving module outputs the display driving signal according to the preset time sequence, and the backlight driving module outputs the backlight driving signal according to the preset time sequence; the display panel receives the display driving signal and scans and displays the monochrome gray scale image line by line; the backlight panel receives the backlight driving signal, and emits monochromatic light corresponding to the monochromatic gray scale image line by line when the display panel displays the monochromatic gray scale image line by line. The display unit and the backlight unit are matched for displaying in the embodiment of the invention, so that the light emitting time of the backlight unit can be prolonged, and the display brightness is improved. Furthermore, the display time of a frame of color image can be compressed, and the refreshing frequency is improved, so that the display effect is improved.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The backlight module, the display device and the control method thereof provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. The backlight module is characterized by comprising a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units;
the backlight driving module is configured to drive the row backlight unit to sequentially emit monochromatic light corresponding to the monochromatic gray scale image according to a preset time sequence when the display panel displays the monochromatic gray scale image row by row so as to enable the display panel to display a color image;
the display time of one row of display units is the same as the light emitting time of the corresponding row of backlight units.
2. The backlight module according to claim 1,
the backlight driving module is configured to drive the N-th row of backlight units of the backlight panel to emit monochromatic light corresponding to the monochromatic gray scale image when the N-th row of display units of the display panel displays the monochromatic gray scale image; wherein N is a positive integer.
3. The backlight module according to claim 2, wherein the monochrome gray scale image comprises a first gray scale image, a second gray scale image and a third gray scale image;
the backlight driving module is configured to drive the N-th row of backlight units to emit monochromatic light corresponding to the first gray scale image when the N-th row of display units display the first gray scale image; when the display units in the Nth row display the second gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the second gray scale image; when the display units in the Nth row display unit display the third gray scale image, driving the backlight units in the Nth row to emit monochromatic light corresponding to the third gray scale image;
and the Nth row of display units scans the second gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the first gray scale image, and scans the third gray scale image after the Nth row of backlight units send out monochromatic light corresponding to the second gray scale image.
4. A backlight module according to claim 1, wherein the backlight unit comprises a plurality of monochromatic light sources;
the backlight driving module is configured to sequentially drive the monochromatic light sources corresponding to the monochromatic gray scale images in the line backlight unit to emit light according to a preset time sequence when the display panel displays the monochromatic gray scale images in a line-by-line scanning mode.
5. The backlight module according to claim 4,
the backlight unit is a direct type RGB light source;
the monochromatic light source is a light emitting diode.
6. A display device, comprising a display panel, a display driving module, and a backlight module according to any one of claims 1-5;
the backlight module comprises a backlight driving module and a backlight panel; the backlight panel is arranged on one side of the display panel, which is far away from the light-emitting surface; the backlight panel is provided with a plurality of rows of backlight units, the display panel is provided with a plurality of rows of display units, and one row of backlight units corresponds to one row of display units;
the display driving module is configured to drive the display panel to scan and display a monochrome gray scale image line by line according to a preset time sequence;
the backlight driving module is configured to drive the backlight panel to emit monochromatic light corresponding to the monochromatic gray scale image line by line according to the preset time sequence when the display panel displays the monochromatic gray scale image line by line, so that the display panel displays a color image, and the display time of one line of display units is the same as the light emitting time of the corresponding line of backlight units.
7. A control method of a display device, applied to the display device according to claim 6, the method comprising:
the display driving module outputs display driving signals according to a preset time sequence, and the backlight driving module outputs backlight driving signals according to the preset time sequence;
the display panel receives the display driving signal and scans and displays a monochrome gray scale image line by line;
the backlight panel receives the backlight driving signal, and when the display panel displays the monochromatic gray-scale image line by line, monochromatic light corresponding to the monochromatic gray-scale image is emitted line by line, and the display time of one line of display units is the same as the light emitting time of the corresponding line of backlight units.
8. The method of claim 7, wherein the display panel receives the display driving signal and displays a monochrome gray scale image by scanning line by line, comprising:
scanning an Nth row of display units of the display panel, wherein the Nth row of display units respond to and display a first gray-scale image;
scanning the display units in the Nth row when the backlight units in the Nth row of the backlight panel finish lighting corresponding to the first gray scale image, wherein the display units in the Nth row respond to and display a second gray scale image;
scanning the display units in the Nth row when the backlight units in the Nth row finish lighting corresponding to the second gray scale image, wherein the display units in the Nth row respond to and display a third gray scale image;
wherein N is a positive integer.
9. The method of claim 8, wherein the display panel receives the display driving signal and displays a monochrome gray scale image by scanning line by line, comprising:
and scanning the adjacent (N + 1) th row of display units when the N-th row of backlight units emit light corresponding to the first gray scale image.
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| CN110875018B (en) | 2019-11-28 | 2021-04-06 | 京东方科技集团股份有限公司 | Display device, driving method thereof and driving circuit thereof |
| CN111048053B (en) * | 2020-01-03 | 2021-11-02 | Tcl华星光电技术有限公司 | Liquid crystal display device and driving method thereof |
| CN111667796A (en) * | 2020-07-07 | 2020-09-15 | 京东方科技集团股份有限公司 | Driving device and method for direct type backlight module |
| CN113362776A (en) * | 2021-06-30 | 2021-09-07 | 北京京东方光电科技有限公司 | Field sequence display device, control method and display equipment |
| CN114743514A (en) * | 2022-06-09 | 2022-07-12 | 南京惠华电子技术有限公司 | Method for high-brightness multicolor display of liquid crystal display module |
| CN117456939A (en) * | 2023-12-11 | 2024-01-26 | 北京显芯科技有限公司 | Control method and apparatus for backlight unit |
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| CN101114426B (en) * | 2006-07-24 | 2011-07-20 | 光远科技股份有限公司 | LCD device and scanning method |
| CN101154355A (en) * | 2006-09-30 | 2008-04-02 | 中华映管股份有限公司 | Display device driving method |
| JP5344846B2 (en) * | 2008-03-31 | 2013-11-20 | ゴールドチャームリミテッド | Display panel control device, liquid crystal display device, electronic device, and display panel drive control method |
| CN101739958B (en) * | 2008-11-24 | 2013-08-07 | 奇美电子股份有限公司 | Device and method for multi-region dynamically backlight driving |
| CN103106875B (en) * | 2011-11-11 | 2015-09-23 | 联咏科技股份有限公司 | Image display device, display control device and screen control chip |
| CN104021768B (en) * | 2014-05-28 | 2016-08-31 | 京东方科技集团股份有限公司 | A kind of display device and driving method thereof |
| CN105137656B (en) * | 2015-10-10 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of backlight module, its driving method and display device |
| CN107331355A (en) * | 2017-08-31 | 2017-11-07 | 京东方科技集团股份有限公司 | A kind of backlight module, its control method and display device |
| CN107908033A (en) * | 2017-12-29 | 2018-04-13 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display |
| CN108269548A (en) * | 2018-02-12 | 2018-07-10 | 苏州佳世达电通有限公司 | Display device and method for controlling backlight thereof |
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