CN109461421B - Field sequence display and driving method - Google Patents
Field sequence display and driving method Download PDFInfo
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- CN109461421B CN109461421B CN201811604938.9A CN201811604938A CN109461421B CN 109461421 B CN109461421 B CN 109461421B CN 201811604938 A CN201811604938 A CN 201811604938A CN 109461421 B CN109461421 B CN 109461421B
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The invention provides a field sequence display, which comprises an original information acquisition unit, a pixel brightness adjustment unit and an output unit. The original information acquisition unit is used for acquiring an original brightness value of each sub-pixel of a plurality of sub-pixels of each pixel unit of a multi-frame image in original image data; the pixel brightness adjusting unit is used for generating adjusted image data according to an original brightness value, the adjusted image data comprises an adjusted brightness value of each sub-pixel of a plurality of sub-pixels of each frame image of a plurality of frame images, the sum of the adjusted brightness values of each sub-pixel in the plurality of frame images is equal to the original brightness value, and the combination of the adjusted brightness values of the sub-pixels of each pixel unit is not completely the same on the plurality of frame images; the output unit is used for displaying the multi-frame images in sequence according to the adjusted image data. The invention also provides a driving method. The field sequence display and the driving method improve the phenomenon of uneven display brightness under a large visual angle.
Description
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a field sequence display and a driving method.
Background
With the development of Display technology, the viewing angle of a Liquid Crystal Display (LCD) has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by screen information leakage. Therefore, the existing display modes may include a non-bias mode for wide viewing angle display and a bias mode for narrow viewing angle display, and the two modes may be switched to each other. Fig. 1 is a schematic side cross-sectional view of a conventional liquid crystal display panel in a bias mode, as shown in fig. 1, the liquid crystal display panel is used in an in-plane switching (IPS) mode liquid crystal display device capable of switching between wide and narrow viewing angles, and a bias voltage is applied to a common electrode in the display panel to generate a corresponding electric field E to increase a deflection angle θ of liquid crystal molecules, so that a transmittance of a backlight is correspondingly increased, and thus, an original image cannot be distinguished due to too high brightness at a large viewing angle, and a purpose of reducing the viewing angle is achieved.
However, since the liquid crystal molecules are in a slender rod-like structure, when a user views the liquid crystal display near a large viewing angle range, the liquid crystal display may see a low gray scale inversion but brighter than a high gray scale, that is, a gray scale inversion phenomenon similar to black-white inversion is seen, and then the display has a display brightness non-uniformity (Mura) phenomenon, thereby affecting the user experience of the display.
Disclosure of Invention
In view of the foregoing, an object of the present invention is to provide a field sequential display for improving the problem of uneven display brightness of the display under a large viewing angle.
Specifically, an embodiment of the present invention provides a field sequential display, including an original information obtaining unit, a pixel brightness adjusting unit, and an output unit; the original information acquisition unit is used for acquiring an original brightness value of each sub-pixel of a plurality of sub-pixels of each pixel unit of each frame image of a plurality of frames of images in original image data; the pixel brightness adjusting unit is used for generating adjusted image data according to the original brightness value, the adjusted image data comprises an adjusted brightness value of each sub-pixel of a plurality of sub-pixels of each frame image of the multi-frame images, the sum of the adjusted brightness values of each sub-pixel in the multi-frame images is equal to the original brightness value, and the combination of the adjusted brightness values of the sub-pixels of each pixel unit is not completely the same on the multi-frame images; the output unit is used for sequentially displaying the multi-frame images according to the adjusted image data.
Further, the multi-frame image is a two-frame image, and the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel and a blue sub-pixel.
Further, in an odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 0% of the corresponding original luminance values, respectively, and in an even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 100% of the corresponding original luminance values, respectively.
Further, in an odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 50% of the corresponding original luminance values, respectively, and in an even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 50% of the corresponding original luminance values, respectively.
Further, the field sequential display includes a light source, the light source includes at least one red sub-light source, at least one blue sub-light source, and at least one green sub-light source, and each of the red sub-light sources, the blue sub-light sources, or the green sub-light sources emits light in a field sequential display manner.
Further, the display panel of the field sequential display includes a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, the first substrate is provided with a viewing angle control electrode, the second substrate is provided with a common electrode and a pixel electrode, the second substrate is defined by a plurality of data lines and a plurality of scanning lines in an insulated and crossed manner to form the plurality of sub-pixel units, the pixel electrode is disposed in each sub-pixel, receives a pixel voltage output by the output unit 30 through the data line according to the adjusted image data, and the viewing angle control electrode and the common electrode are planar electrodes covering the display area on the whole surface.
The embodiment of the present invention further provides a driving method of a field sequential display, where a display panel of the field sequential display includes a plurality of pixel units, each pixel unit includes a plurality of sub-pixels, and the driving method includes: acquiring an original brightness value of each sub-pixel of a plurality of sub-pixels of each pixel unit of a multi-frame image in original image data; generating adjusted image data according to the original brightness value, wherein the adjusted image data comprises an adjusted brightness value of each sub-pixel of a plurality of sub-pixels of each frame image of the multi-frame images, the sum of the adjusted brightness values of each sub-pixel in the multi-frame images is equal to the original brightness value, and the combination of the adjusted brightness values of the sub-pixels of each pixel unit is not completely the same on the multi-frame images; and sequentially displaying the multi-frame images according to the adjusted image data.
Further, the multi-frame image is a two-frame image, and the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel and a blue sub-pixel.
Further, in an odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 0% of the corresponding original luminance values, respectively, and in an even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 100% of the corresponding original luminance values, respectively.
Further, in an odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 50% of the corresponding original luminance values, respectively, and in an even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 50% of the corresponding original luminance values, respectively.
Further, the field sequential display includes a light source including at least one red sub-light source, at least one blue sub-light source, and at least one green sub-light source, and each of the red sub-light sources, the blue sub-light sources, or the green sub-light sources is driven in a field sequential display manner, respectively.
In the field sequential display and the driving method provided by the embodiment of the invention, the adjusted image data is generated according to the original brightness value in the original image data, the sum of the adjusted brightness values of each sub-pixel in the multi-frame image is equal to the original brightness value, and the combination of the adjusted brightness values of the sub-pixels of each pixel unit is not completely the same on the multi-frame image. Therefore, when each frame of image is displayed, the liquid crystal molecules corresponding to the corresponding pixel units always deflect, the phenomenon of uneven display brightness under a large visual angle can be improved, and the use experience of a user is improved.
In order to make the aforementioned and other objects, features and advantages of the invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic side cross-sectional view of a conventional liquid crystal display panel in a bias mode.
Fig. 2 is a block diagram of a field sequential display according to a first embodiment of the invention.
Fig. 3 is a schematic cross-sectional view of an odd frame and an even frame of a display panel of a field sequential display in a bias mode according to a second embodiment of the invention.
Fig. 4 is a schematic cross-sectional view of an odd frame and an even frame of a display panel of a field sequential display according to a third embodiment of the invention in a bias mode.
Fig. 5 is a flowchart illustrating a driving method of a field sequential display according to a fourth embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose, the following detailed description of the embodiments, methods, steps, structures, features and effects of the field sequential display and the driving method according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings. While the invention has been described in connection with specific embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention.
First embodiment
Fig. 2 is a block diagram of a field sequential display according to a first embodiment of the invention. As shown in fig. 2, the field sequential display of the present embodiment includes an original information acquiring unit 10, a pixel luminance adjusting unit 20, and an output unit 30. The original information acquiring unit 10 is configured to acquire an original luminance value of each of a plurality of sub-pixels of each pixel unit of each frame image of a plurality of frame images in original image data. The pixel luminance adjusting unit 20 is configured to generate adjusted image data according to an original luminance value, the adjusted image data includes an adjusted luminance value of each of a plurality of sub-pixels of each frame image of the plurality of frame images, a sum of the adjusted luminance values of each of the plurality of sub-pixels of each of the plurality of pixel units over the plurality of frame images is equal to the original luminance value, and a combination of the adjusted luminance values of the plurality of sub-pixels of each of the pixel units is not identical over the plurality of frame images. The output unit 30 is configured to sequentially display a plurality of frames of images according to the adjusted image data.
In an embodiment, the multi-frame image may be, but is not limited to, a two-frame image, for example, a three-frame image, etc., the plurality of sub-pixels of each pixel unit may be, but is not limited to, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the plurality of sub-pixels may also be a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, or the plurality of sub-pixels may also be a combination of a plurality of sub-pixels of other colors, etc. The following description will specifically take the multi-frame image as two-frame image, and the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
Specifically, first, the original information acquiring unit 10 acquires an original luminance value of each of a plurality of sub-pixels of each pixel unit of each frame image of a plurality of frame images in original image data, for example, the original information acquiring unit 10 acquires an original luminance value of a red sub-pixel, an original luminance value of a green sub-pixel, and an original luminance value of a blue sub-pixel of each pixel unit in two frame images (odd frame image and even frame image) in the original image data.
Then, the pixel luminance adjusting unit 20 generates adjusted image data including an adjusted luminance value of each of the plurality of sub-pixels of each of the pixel units of each of the frames of the plurality of frames of images based on the original luminance value, and a sum of the adjusted luminance values of each of the plurality of sub-pixels corresponding to each of the frames of the images is equal to the original luminance value. For example, when the multi-frame image is a two-frame image, the adjusted luminance value of the image data is an original luminance value of a red subpixel which is a1 times the adjusted luminance value of a red subpixel of the odd-numbered frame image, an original luminance value of a green subpixel which is b1 times the adjusted luminance value of the green subpixel, an original luminance value of a blue subpixel which is c1 times the adjusted luminance value of the blue subpixel, and the adjusted luminance value of the image data is an original luminance value of a red subpixel which is a2 times the adjusted luminance value of a red subpixel of the even-numbered frame image, an original luminance value of a green subpixel which is b2 times the adjusted luminance value of the green subpixel, and an original luminance value of a blue subpixel which is c2 times the adjusted luminance value of the blue subpixel, where a1, b1, c1, a2, b2, and c2 are all equal to or greater than 0 and equal to or less than 1, and a1+ a2 is equal to 1, b1+ b2 is equal to 1, and c1+ c2 is equal to; moreover, the combination of the adjusted luminance values of the plurality of sub-pixels per pixel unit is not exactly the same over the multi-frame image, i.e., a1 ═ a2, b1 ═ b2, and c1 ═ c2 cannot be simultaneously used.
Finally, the output unit 30 sequentially outputs the multi-frame images according to the adjusted image data, for example, when the multi-frame images are two-frame images, the odd-frame images and the even-frame images are sequentially displayed. In this embodiment, the display panel may include a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines are insulated from each other and cross to define a plurality of pixel units, a pixel electrode in each sub-pixel of each pixel unit is connected to a scan line and a data line adjacent to the thin film transistor through the thin film transistor, the output unit 30 may output a corresponding pixel voltage through the plurality of data lines according to the adjustment image data, and when the thin film transistor receives a corresponding scan signal through the scan line and is turned on, the pixel electrode of the corresponding sub-pixel obtains the corresponding pixel voltage. Therefore, liquid crystal molecules of a liquid crystal layer in the display panel deflect under an electric field generated by the pixel voltage, the deflection angle beta corresponds to the adjusted brightness value, the light transmittance is correspondingly adjusted, and the sub-pixels emit light with the adjusted brightness value of the corresponding color. Because the adjusted combinations of the brightness values of the plurality of sub-pixels of each pixel unit are not completely the same on the multi-frame image, when the pixel unit displays the multi-frame image, the deflection angles β of the liquid crystal molecules corresponding to the corresponding pixel units are not completely the same, that is, the liquid crystal molecules corresponding to the corresponding pixel units are always deflected and are not fixed at the deflection angle β, and the brightness of the pixel units of the corresponding frame image is also always changed, thereby improving the phenomenon of uneven display brightness under a large viewing angle.
The field sequential display of the present embodiment obtains color display by sequentially switching and displaying a plurality of frames of images (for example, two frames of images) at high speed in time series, utilizing the persistence of vision characteristic of human eyes. In an embodiment, the multi-frame images may be the same original image, and the brightness and the contrast of the original image may not be changed by displaying the multi-frame images and under the condition that the sum of the adjusted brightness values of each frame image of the multi-frame image corresponding to each of the plurality of sub-pixels is equal to the original brightness value; in order to ensure the fluency of display, the refreshing time of the pixel can be increased to multiple times of the original refreshing time. In an embodiment, the multi-frame images may not be the same original image, because the refresh times of the pixels are higher, and the difference between the frames of the consecutive frame images is not large (especially, the display displays the static frames of the consecutive frames), and by using the persistence of vision of human eyes, the color display may be obtained, and the corresponding image may be obtained, and the refresh times of the pixels may be increased to improve the smoothness of the dynamic frame display of the image.
In an embodiment, the field sequential display includes a light source, and the light source may include at least one red sub-light source, at least one blue sub-light source, and at least one green sub-light source, each of the red sub-light sources, the blue sub-light sources, or the green sub-light sources emitting light in a field sequential display manner. Specifically, when multiple frames of images are displayed in sequence, the sub-light sources of corresponding colors are also turned on in sequence, for example, the multiple frames of images are two frames of images, that is, an odd frame of image and an even frame of image, in the odd frame of image, both the red sub-pixel and the blue sub-pixel display 0% of the corresponding original brightness value, and the green sub-pixel displays 100% of the corresponding original brightness value, then when the frame of image is displayed, only the corresponding green sub-light source is turned on to emit light, and in the even frame of image, both the red sub-pixel and the blue sub-pixel display 100% of the corresponding original brightness value, and the green sub-pixel displays 0% of the corresponding original brightness value, then when the frame of image is displayed, only the corresponding; therefore, each red sub-light source, each blue sub-light source or each green sub-light source respectively emits light in a field sequential display mode, and the energy-saving effect can be achieved.
The field sequential display of this embodiment generates the adjusted image data according to the original luminance value in the original image data, and the sum of the adjusted luminance values of each sub-pixel in the multi-frame image is equal to the original luminance value, and the combination of the adjusted luminance values of the sub-pixels of each pixel unit is not completely the same in the multi-frame image; therefore, when each frame of image is displayed, the liquid crystal molecules corresponding to the corresponding pixel units always deflect, the phenomenon of uneven display brightness under a large visual angle can be improved, and the use experience of a user is improved.
Second embodiment
Fig. 3 is a schematic cross-sectional view of an odd frame and an even frame of a display panel of a field sequential display in a bias mode according to a second embodiment of the invention. This embodiment is substantially the same as the first embodiment except that: the multi-frame image is two-frame image, and the multiple sub-pixels of each pixel unit comprise a red sub-pixel, a green sub-pixel and a blue sub-pixel; in the odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 0% of the corresponding original luminance values, respectively, and in the even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 100% of the corresponding original luminance values, respectively.
Specifically, the field sequential display of the present embodiment is based on that the contribution ratio of red light, green light, and blue light in a normal image to the image display luminance is about: the red light accounts for 20%, the green light accounts for 65%, and the blue light accounts for 15%, the green light contributes most to the image display luminance, whereby the adjusted luminance values of the respective sub-pixels of the pixel unit of the multi-frame image are set to reduce the screen flickering feeling when the white screen is displayed. As shown in fig. 3, taking the display panel in the field sequential display of an embodiment as an example of a normally black display panel in an in-plane switching mode (IPS), the pixel electrodes connected to the pixel units receive corresponding driving voltages to form an electric field, and the liquid crystal molecules are deflected in a plane perpendicular to the electric field and deflected at a maximum at the surface of the liquid crystal layer, where the deflection angle is β. When displaying odd frame images, the red sub-pixels and the blue sub-pixels respectively have 0% of the corresponding original brightness values because of the adjusted brightness values, the corresponding liquid crystal molecules are hardly deflected to enable the deflection angle beta to be smaller, the corresponding transmittance reaches the lowest, and the green sub-pixels have 100% of the corresponding original brightness values because of the adjusted brightness values, the corresponding liquid crystal molecules are deflected to enable the deflection angle beta to be larger, and the corresponding transmittance reaches the highest; when even frame images are displayed, the red sub-pixels and the blue sub-pixels respectively have the corresponding original brightness values of 100% because the adjusted brightness values are respectively, the corresponding liquid crystal molecules are deflected to enable the deflection angle beta to be larger, the corresponding transmittance is the highest, and the green sub-pixels have the corresponding original brightness values of 0% because the adjusted brightness values are respectively, the corresponding liquid crystal molecules are hardly deflected to enable the deflection angle beta to be smaller, and the corresponding transmittance is the lowest. Therefore, when each sub-pixel of the pixel unit displays an odd frame image and an even frame image, the liquid crystal molecules have two deflection angles beta with larger difference, so that the liquid crystal molecules always deflect greatly, and the brightness of the pixel unit of the corresponding frame image also always changes and greatly changes, thereby better improving the phenomenon of uneven display brightness under a large visual angle. The above is only an example in which the display panel in the field sequential display is an in-plane switching mode (IPS) and the normally black display panel and the liquid crystal molecules are negative liquid crystal molecules, but the present embodiment is not limited thereto, and for example, the display panel in the field sequential display may be an in-plane switching mode (IPS) and normally white display panel, a Twisted Nematic (TN) display panel, an in-plane switching mode (FFS) display panel, or the like, and the liquid crystal molecules may be positive liquid crystal molecules, and all of them belong to the protection scope of the present invention.
The field sequential display of this embodiment generates the adjusted image data according to the original luminance value in the original image data, and the sum of the adjusted luminance values of each sub-pixel in the multi-frame image is equal to the original luminance value, and the combination of the adjusted luminance values of the sub-pixels of each pixel unit is not completely the same in the multi-frame image; therefore, when each frame of image is displayed, the liquid crystal molecules corresponding to the corresponding pixel units always deflect, the phenomenon of uneven display brightness under a large visual angle can be improved, and the use experience of a user is improved.
Third embodiment
Fig. 4 is a schematic cross-sectional view of an odd frame and an even frame of a display panel of a field sequential display according to a third embodiment of the invention in a bias mode. This embodiment is substantially the same as the second embodiment except that: in the odd frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 0%, 100%, and 50% of the corresponding original luminance values, respectively, and in the even frame image, the adjusted luminance values of the red, green, and blue sub-pixels are 100%, 0%, and 50% of the corresponding original luminance values, respectively.
Specifically, the field sequential display of the present embodiment is based on that the contribution ratio of red light, green light, and blue light in a normal image to the image display luminance is about: the red light accounts for 20%, the green light accounts for 65%, and the blue light accounts for 15%, and the blue light has the smallest contribution to the image display brightness, so that the adjusted brightness values of the sub-pixels of the pixel unit of the multi-frame image can be set by mainly performing corresponding adjustments on the red light and the green light, so as to reduce the flicker feeling of the image when the white image is displayed. As shown in fig. 4, taking the example that the display panel in the field sequential display of an embodiment is an in-plane switching mode (IPS) normally black display panel, the pixel electrodes connected to the pixel units receive corresponding driving voltage lines to form an electric field, the liquid crystal molecules are deflected in a plane perpendicular to the electric field, and the deflection reaches a maximum at the surface of the liquid crystal layer, and the deflection angle is β. When displaying odd frame images, the red sub-pixels hardly deflect to enable the deflection angle beta to be smaller because the brightness value after adjustment is 0% of the corresponding original brightness value, and the corresponding transmittance reaches the lowest, and the green sub-pixels deflect to enable the deflection angle beta to be larger because the brightness value after adjustment is 100% of the corresponding original brightness value, and the corresponding transmittance reaches the highest; when even frame images are displayed, the brightness value of the red sub-pixel is 100% of the corresponding original brightness value after adjustment, the corresponding liquid crystal molecules deflect to enable the deflection angle beta to be larger, the corresponding transmittance reaches the highest, the corresponding liquid crystal molecules of the green sub-pixel hardly deflect to enable the deflection angle beta to be smaller, and the corresponding transmittance reaches the lowest. Therefore, when each sub-pixel of the pixel unit displays an odd frame image and an even frame image, the liquid crystal molecules have two deflection angles beta with larger difference, so that the liquid crystal molecules always deflect greatly, and the brightness of the pixel unit of the corresponding frame image also always changes and is larger, so that the phenomenon of uneven display brightness under a large visual angle can be well improved. The above is only an example in which the display panel in the field sequential display is an in-plane switching mode (IPS) and normally black display panel, but the present embodiment is not limited thereto, and the display panel in the field sequential display may be an in-plane switching mode (IPS) and normally white display panel, a Twisted Nematic (TN) display panel, an in-plane switching mode (FFS) display panel, or the like, and the scope of the present invention is intended to be limited thereto.
The field sequential display of this embodiment generates the adjusted image data according to the original luminance value in the original image data, and the sum of the adjusted luminance values of each sub-pixel in the multi-frame image is equal to the original luminance value, and the combination of the adjusted luminance values of the sub-pixels of each pixel unit is not completely the same in the multi-frame image; therefore, when each frame of image is displayed, the liquid crystal molecules corresponding to the corresponding pixel units always deflect, the phenomenon of uneven display brightness under a large visual angle can be improved, and the use experience of a user is improved.
Fourth embodiment
The field sequential display of this embodiment is basically the same as the first embodiment, except that: the display panel of the field sequential display comprises a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer arranged between the first substrate and the second substrate, wherein a viewing angle control electrode is arranged on the first substrate, a common electrode and a pixel electrode are arranged on the second substrate, a plurality of sub-pixel units are formed on the second substrate by mutually insulating and intersecting a plurality of data lines and a plurality of scanning lines, the pixel electrode is arranged in each sub-pixel, a receiving and outputting unit 30 receives pixel voltage output by the data lines according to adjusted image data, and the viewing angle control electrode and the common electrode are planar electrodes covering a display area on the whole surface.
Specifically, the field sequential display of the embodiment includes a display panel, where the display panel includes a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate, the first substrate is provided with a viewing angle control electrode, and the second substrate is provided with a common electrode and a pixel electrode; the display panel further includes a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines are insulated from each other and cross to define a plurality of pixel units, a pixel electrode in each sub-pixel of each pixel unit is connected to a scan line and a data line adjacent to the thin film transistor through the thin film transistor, the output unit 30 can output a corresponding data signal pixel voltage through the plurality of data lines according to the adjusted image data, and when the thin film transistor receives a corresponding scan signal through the scan line and is turned on, the pixel electrode of the corresponding sub-pixel obtains a corresponding driving pixel voltage according to the data signal. For example, the pixel electrode in the red sub-pixel (or the green sub-pixel, the blue sub-pixel) receives the pixel voltage on the data line through the corresponding thin film transistor, and the pixel voltage is obtained by the output unit 30 according to the adjusted luminance value of the red sub-pixel (or the green sub-pixel, the blue sub-pixel) in the adjusted image data. Therefore, liquid crystal molecules of a liquid crystal layer in the display panel deflect under an electric field generated by the pixel voltage, the deflection angle beta corresponds to the adjusted brightness value, the light transmittance is correspondingly adjusted, and the sub-pixels emit light with the adjusted brightness value of the corresponding color to display corresponding images. Because the adjusted combinations of the brightness values of the plurality of sub-pixels of each pixel unit are not completely the same on the multi-frame image, when the pixel unit displays the multi-frame image, the deflection angles β of the liquid crystal molecules corresponding to the corresponding pixel units are not completely the same, that is, the liquid crystal molecules corresponding to the corresponding pixel units are always deflected and are not fixed at the deflection angle β, and the brightness of the pixel units of the corresponding frame image is also always changed, thereby improving the phenomenon of uneven display brightness under a large viewing angle.
Meanwhile, the field sequential display of the embodiment can also realize the switching between the non-bias mode of the wide viewing angle display and the bias mode of the narrow viewing angle display by determining whether to apply the control voltage to the viewing angle control electrode when displaying the image. Specifically, when the viewing angle control electrode does not receive the corresponding control voltage, the field sequential display works in a non-bias mode of wide viewing angle display; when the viewing angle control electrode receives a corresponding control voltage, the liquid crystal molecules correspondingly deflect in an electric field correspondingly formed by the control voltage, and referring to fig. 1, the transmittance of the backlight is correspondingly increased, so that the original image cannot be distinguished due to overlarge brightness under a large viewing angle, the purpose of reducing the viewing angle is achieved, and the field sequential display works in a bias mode of narrow viewing angle display. When the field sequential display of the present embodiment displays each frame of image, the liquid crystal molecules corresponding to the corresponding pixel units are always deflected, so that the phenomenon of non-uniform display brightness with a large viewing angle in the bias mode can be improved.
The field sequential display of the embodiment can realize the switching between the non-bias mode of the wide-view display and the bias mode of the narrow-view display by applying the control voltage on the view angle control electrode, and the field sequential display can always deflect the liquid crystal molecules corresponding to the corresponding pixel units when each frame of image is displayed, so that the phenomenon of uneven display brightness at the large view angle of the bias mode can be improved, and the use experience of a user is improved.
Fifth embodiment
Fig. 5 is a flowchart illustrating a driving method of a field sequential display according to a fifth embodiment of the invention. The present embodiment provides a driving method of a field sequential display, a display panel of the field sequential display includes a plurality of pixel units, each pixel unit includes a plurality of sub-pixels, the driving method includes:
s1, acquiring an original brightness value of each sub-pixel of a plurality of sub-pixels of each pixel unit of a multi-frame image of original image data;
in one embodiment, the multi-frame image may be, but is not limited to, a two-frame image, for example, a three-frame image, etc., the plurality of sub-pixels of each pixel unit may be, but is not limited to, a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the plurality of sub-pixels may also be a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, or the plurality of sub-pixels may also be a plurality of sub-pixels of other colors, etc. The following description will specifically take the multi-frame image as two-frame image, and the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
In the present embodiment, first, the original luminance value of each of the plurality of sub-pixels of each pixel unit of each frame image of the plurality of frame images in the original image data is acquired, and for example, the original information acquiring unit 10 acquires the original luminance value of the red sub-pixel, the original luminance value of the green sub-pixel, and the original luminance value of the blue sub-pixel of each pixel unit in two frames images (odd frame image and even frame image) in the original image data.
S2, generating adjusted image data according to the original brightness value, wherein the adjusted image data comprises the adjusted brightness value of each sub-pixel of the sub-pixels of each frame image of the multi-frame images, and the sum of the adjusted brightness values of each sub-pixel of the sub-pixels of the multi-frame images is equal to the original brightness value;
then, adjusted image data is generated based on the original luminance value, the adjusted image data including an adjusted luminance value of each of a plurality of sub-pixels of each pixel unit of each frame image of the plurality of frame images, and a sum of the adjusted luminance values of each of the plurality of sub-pixels of each frame image of the corresponding plurality of frame images is equal to the original luminance value. For example, when the multi-frame image is a two-frame image, the adjusted luminance value of the image data is an original luminance value of a red subpixel which is a1 times the adjusted luminance value of a red subpixel of the odd-numbered frame image, an original luminance value of a green subpixel which is b1 times the adjusted luminance value of the green subpixel, an original luminance value of a blue subpixel which is c1 times the adjusted luminance value of the blue subpixel, and the adjusted luminance value of the image data is an original luminance value of a red subpixel which is a2 times the adjusted luminance value of a red subpixel of the even-numbered frame image, an original luminance value of a green subpixel which is b2 times the adjusted luminance value of the green subpixel, and an original luminance value of a blue subpixel which is c2 times the adjusted luminance value of the blue subpixel, where a1, b1, c1, a2, b2, and c2 are all equal to or greater than 0 and equal to or less than 1, and a1+ a2 is equal to 1, b1+ b2 is equal to 1, and c1+ c2 is equal to; moreover, the combination of the adjusted luminance values of the plurality of sub-pixels per pixel unit is not completely the same over the multi-frame image, i.e., a1 ═ a2, b1 ═ b2, and c1 ═ c2 cannot be simultaneously used.
In one embodiment, the adjusted luminance values of the red, green and blue sub-pixels are 0%, 100% and 0% of the corresponding original luminance values in the odd frame image, and 100%, 0% and 100% of the corresponding original luminance values in the even frame image, respectively.
In one embodiment, the adjusted luminance values of the red, green and blue sub-pixels are 0%, 100% and 50% of the corresponding original luminance values in the odd frame image, and 100%, 0% and 50% of the corresponding original luminance values in the even frame image, respectively.
And S3, sequentially displaying the multi-frame images according to the adjusted image data.
And finally, sequentially outputting the multi-frame images according to the adjusted image data, for example, sequentially displaying the odd frame images and the even frame images when the multi-frame images are two frames of images. In this embodiment, the display panel may include a plurality of scan lines and a plurality of data lines, the plurality of scan lines and the plurality of data lines are insulated from each other and cross to define a plurality of pixel units, a pixel electrode in each sub-pixel of each pixel unit is connected to a scan line and a data line adjacent to the thin film transistor through the thin film transistor, and may output a corresponding pixel voltage through the plurality of data lines according to the adjustment image data, and when the thin film transistor receives a corresponding scan signal through the scan line and is turned on, the pixel electrode of the corresponding sub-pixel obtains the corresponding pixel voltage. Therefore, liquid crystal molecules of a liquid crystal layer in the display panel deflect under an electric field generated by the pixel voltage, the deflection angle corresponds to the adjusted brightness value, the light transmittance is correspondingly adjusted, and the sub-pixels emit light with the adjusted brightness value of the corresponding color. Because the adjusted combinations of the brightness values of the plurality of sub-pixels of each pixel unit are not completely the same on the multi-frame image, when the pixel unit displays the multi-frame image, the deflection angles of the liquid crystal molecules corresponding to the corresponding pixel units are not completely the same, that is, the liquid crystal molecules corresponding to the corresponding pixel units are always deflected and are not fixed at a deflection angle, and the brightness of the pixel units of the corresponding frame image is also always changed, thereby improving the phenomenon of uneven display brightness under a large viewing angle.
In one embodiment, the field sequential display comprises a light source, and the light source comprises at least one red sub-light source, at least one blue sub-light source and at least one green sub-light source, each of the red, blue or green sub-light sources being driven in a field sequential display manner, respectively.
In the driving method of the field sequential display of the present embodiment, the adjusted image data is generated according to the original luminance value in the original image data, the sum of a plurality of adjusted luminance values of each sub-pixel in the multi-frame image is equal to the original luminance value, and the combination of the adjusted luminance values of the plurality of sub-pixels of each pixel unit is not completely the same in the multi-frame image; therefore, when each frame of image is displayed, the liquid crystal molecules corresponding to the corresponding pixel units always deflect, the phenomenon of uneven display brightness under a large visual angle can be improved, and the use experience of a user is improved.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A field sequential display, a display panel of which comprises a plurality of pixel units, each pixel unit comprising a plurality of sub-pixels, the field sequential display comprising:
an original information acquisition unit (10) for acquiring, in a bias mode of narrow-angle display, an original luminance value of each of a plurality of sub-pixels of each pixel unit of each frame image of a plurality of frame images in original image data;
a pixel luminance adjusting unit (20) for generating adjusted image data from the original luminance value, the adjusted image data including an adjusted luminance value of each of a plurality of sub-pixels of each pixel unit of each frame image of the plurality of frame images, and a sum of the adjusted luminance values of each sub-pixel over the plurality of frame images is equal to the original luminance value, and a combination of the adjusted luminance values of the plurality of sub-pixels of each pixel unit is not exactly the same over the plurality of frame images;
an output unit (30) for sequentially displaying the plurality of frames of images according to the adjusted image data;
wherein the multi-frame image is a two-frame image, the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the adjusted luminance values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are respectively 0%, 100%, and 0% of the corresponding original luminance values in an odd-numbered frame image, and the adjusted luminance values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are respectively 100%, 0%, and 100% of the corresponding original luminance values in an even-numbered frame image; or in the odd frame image, the adjusted luminance values of the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively 0%, 100% and 50% of the corresponding original luminance values, and in the even frame image, the adjusted luminance values of the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively 100%, 0% and 50% of the corresponding original luminance values.
2. The field sequential display according to claim 1, wherein the field sequential display comprises a light source comprising at least one red sub-light source, at least one blue sub-light source and at least one green sub-light source, each of the red sub-light sources, the blue sub-light sources or the green sub-light sources emitting light in a field sequential display manner.
3. The field sequential display according to claim 1, wherein the display panel of the field sequential display comprises a first substrate, a second substrate disposed opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, the first substrate is provided with a viewing angle control electrode, the second substrate is provided with a common electrode and a pixel electrode, the second substrate is defined by a plurality of data lines and a plurality of scan lines crossing each other in an insulated manner to form the plurality of sub-pixel units, the pixel electrode is disposed in each sub-pixel, the output unit 30 receives a pixel voltage output by the data line according to the adjusted image data, and the viewing angle control electrode and the common electrode are planar electrodes covering the display area entirely.
4. A driving method of a field sequential display, a display panel of the field sequential display including a plurality of pixel units, each pixel unit including a plurality of sub-pixels, the driving method comprising:
acquiring an original brightness value of each sub-pixel of a plurality of sub-pixels of each pixel unit of a plurality of frames of images in original image data in a bias mode of narrow-view display;
generating adjusted image data according to the original brightness value, wherein the adjusted image data comprises an adjusted brightness value of each sub-pixel of a plurality of sub-pixels of each frame image of the multi-frame images, the sum of the adjusted brightness values of each sub-pixel in the multi-frame images is equal to the original brightness value, and the combination of the adjusted brightness values of the sub-pixels of each pixel unit is not completely the same on the multi-frame images;
sequentially displaying the multi-frame images according to the adjusted image data;
wherein the multi-frame image is a two-frame image, the plurality of sub-pixels of each pixel unit include a red sub-pixel, a green sub-pixel, and a blue sub-pixel, the adjusted luminance values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are respectively 0%, 100%, and 0% of the corresponding original luminance values in an odd-numbered frame image, and the adjusted luminance values of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are respectively 100%, 0%, and 100% of the corresponding original luminance values in an even-numbered frame image; or in the odd frame image, the adjusted luminance values of the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively 0%, 100% and 50% of the corresponding original luminance values, and in the even frame image, the adjusted luminance values of the red sub-pixel, the green sub-pixel and the blue sub-pixel are respectively 100%, 0% and 50% of the corresponding original luminance values.
5. The driving method according to claim 4, wherein the field sequential display comprises light sources including at least one red sub-light source, at least one blue sub-light source and at least one green sub-light source, each of the red sub-light sources, the blue sub-light sources or the green sub-light sources being driven in a field sequential display manner, respectively.
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