CN108172191B - Liquid crystal display, driving method and device thereof, and computer storage medium - Google Patents
Liquid crystal display, driving method and device thereof, and computer storage medium Download PDFInfo
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- CN108172191B CN108172191B CN201810159936.7A CN201810159936A CN108172191B CN 108172191 B CN108172191 B CN 108172191B CN 201810159936 A CN201810159936 A CN 201810159936A CN 108172191 B CN108172191 B CN 108172191B
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
Abstract
The embodiment of the invention discloses a liquid crystal display, a driving method and a device thereof and a computer storage medium, wherein the method comprises the following steps: dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel; different driving voltages are used for driving different pixel regions, so that the rotation angle of liquid crystal molecules corresponding to adjacent pixel points can be increased, and the visual angle of the liquid crystal display is further increased. Meanwhile, in the embodiment, the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel, so that the original brightness, aperture ratio and light transmittance of the liquid crystal display are maintained.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a liquid crystal display, a driving method and a driving device thereof and a computer storage medium.
Background
Conventional Liquid Crystal Displays (LCDs) have different viewing angles, which may cause differences in brightness and contrast. For example, when the user station is positioned right in front of a television, the displayed picture content can be clearly seen, and the color is vivid and natural; however, when the user and the display screen form a certain angle, i.e. the user looks sideways at a certain angle, the color of the picture becomes light and the picture is not easy to see clearly. In order to solve this problem, it is necessary to increase the viewing angle of the liquid crystal display.
At present, the viewing angle of the liquid crystal display is increased by dividing the sub-pixels into multiple domains. Specifically, protrusions are implanted in the alignment film on the surface of the electrode, so that the liquid crystal molecules on the surface are aligned along the slopes of the protrusions, and the rest of the liquid crystal molecules are aligned perpendicular to the electrode. When voltage is applied to the liquid crystal molecules, the liquid crystal molecules on the surface of the protrusion start to move and drive the liquid crystal molecules in the domains to be oriented in the same direction, so that the whole sub-pixel unit obtains stable orientation, and the compensation in the corresponding direction can be obtained when the screen is observed from different angles, thereby improving the visual angle.
However, the implantation of the protrusions into the alignment film on the surface of the electrode reduces the aperture ratio and the transmittance, which requires more backlight lamps and increases the backlight cost.
Disclosure of Invention
The embodiment of the invention provides a liquid crystal display, a driving method and a driving device thereof and a computer storage medium, and aims to solve the problem that the existing method is high in cost in increasing the visual angle of the liquid crystal display.
In a first aspect, an embodiment of the present invention provides a method for driving a liquid crystal display, including:
dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel;
and driving different pixel areas by using different driving voltages, wherein the average value of the brightness of the same sub-pixel in each pixel area is equal to the preset brightness of the same sub-pixel.
In a second aspect, an embodiment of the present invention provides a driving apparatus for a liquid crystal display, including:
the dividing module is used for dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel;
and the driving module is used for driving different pixel regions by using different driving voltages, wherein the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel.
In a third aspect, an embodiment of the present invention provides a liquid crystal display, including:
a display panel including a plurality of sub-pixels;
a driving voltage generator generating a preset number of driving voltages;
a register for storing a computer program;
a processor for executing the computer program to implement the method for driving a liquid crystal display according to the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer storage medium, where a computer program is stored, and the computer program, when executed, implements the method for driving the liquid crystal display according to the first aspect.
The embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, at least one same sub-pixel of each pixel point in a pixel unit is respectively divided into different pixel areas to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in a liquid crystal display, and at least one same sub-pixel comprises a blue sub-pixel; and different driving voltages are used for driving different pixel areas, so that the rotation angle of liquid crystal molecules corresponding to adjacent pixel points can be increased, and the visual angle of the liquid crystal display is further increased. Meanwhile, in this embodiment, the average value of the luminance of the same sub-pixel in each pixel region is equal to the preset luminance of the same sub-pixel, so that the original luminance, aperture ratio and light transmittance of the liquid crystal display are maintained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a viewing angle of liquid crystal molecules;
FIG. 2 is a flowchart illustrating a driving method of a liquid crystal display according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a pixel in a liquid crystal display;
FIG. 4 is a schematic diagram illustrating a first pixel region division according to the present embodiment;
FIG. 5 is a schematic diagram illustrating a second pixel region division according to the present embodiment;
FIG. 6 is a schematic diagram illustrating a third division of a pixel region according to the present embodiment;
FIG. 7 is a schematic diagram illustrating a fourth pixel region division according to the present embodiment;
FIG. 8 is a schematic diagram illustrating a fifth pixel region division according to the present embodiment;
FIG. 9 is a schematic diagram illustrating a sixth pixel area division according to the present embodiment;
FIG. 10 is a schematic view showing the rotation of the liquid crystal molecules in this embodiment;
fig. 11 is a flowchart of a driving method of a liquid crystal display according to a second embodiment of the invention;
fig. 12 is a schematic structural diagram of a driving apparatus of a liquid crystal display according to an embodiment of the invention;
fig. 13 is a schematic structural diagram of a driving apparatus of a liquid crystal display according to a second embodiment of the present invention;
fig. 14 is a schematic structural diagram of a liquid crystal display according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The working principle of the liquid crystal display is as follows: LCDs are constructed from two glass plates that contain a liquid crystal material therebetween. Because the liquid crystal material does not emit light, the two sides of the display screen are provided with lamp tubes as light sources, and the back of the liquid crystal display screen is provided with a backlight plate (or called a light homogenizing plate) and a reflective film. The backlight plate is composed of fluorescent substances, can emit light and mainly has the function of providing a uniform background light source. Light from the backlight enters the liquid crystal layer containing thousands of liquid crystal droplets after passing through the first polarization filter layer. The liquid droplets in the liquid crystal layer are contained in a fine cell structure, and one or more cells constitute one pixel on the screen. Between the glass plate and the liquid crystal material, which acts like a small light valve, are transparent electrodes divided into rows and columns, at the intersections of which the optical rotation state of the liquid crystal is changed by changing the voltage. Around the liquid crystal material are a control circuit portion and a drive circuit portion. When an electric field is generated by the electrodes in the LCD, the liquid crystal molecules are twisted, so that light passing through the liquid crystal molecules is regularly refracted, and then filtered by the second filter layer to be displayed on a screen.
Aperture Ratio (Aperture Ratio), i.e. the Ratio of the effective area through which light can pass, specifically, when light is emitted from the backlight, not all light can pass through the panel, for example, signal traces of LCD Source driver chips and Gate driver chips, TFTs (Thin Film transistors), storage capacitors, etc. are all not completely transparent, and cannot display correct gray scale, and need to be shielded by Black Matrix, so as to avoid interfering with correct brightness of other transparent areas. Therefore, the effective light-transmitting area of the panel is the total area of the panel minus the non-light-transmitting area, and the ratio of the effective light-transmitting area to the total area is called the aperture ratio.
The viewing angle is an angle at which a picture displayed on the liquid crystal display can be clearly viewed, for example, the viewing angle is 80 degrees left and right, which means that a screen image can be clearly seen when starting from a position of 80 degrees of a screen normal. If not standing within the optimal viewing angle, the perceived color and brightness will be in error. The viewing angle is symmetrical left and right, but not necessarily symmetrical up and down.
In the prior art, a method for improving the viewing angle by implanting a protrusion into an alignment film on the surface of an electrode to increase the domain number of sub-pixels is achieved at the expense of the aperture ratio of a liquid crystal display.
In order to solve the above technical problem, in the method of this embodiment, a preset number of adjacent pixels in the liquid crystal display are used as pixel units, at least one same sub-pixel of each pixel in the pixel unit is respectively divided into different pixel regions to obtain the preset number of pixel regions, and then different driving voltages are used to drive different pixel regions, so that liquid crystal molecules corresponding to the pixel units rotate at different angles, the view angle of the liquid crystal molecules is increased, and the viewing angle of the display screen is increased. Meanwhile, in the embodiment, the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel, so that the original brightness and the aperture opening ratio of the liquid crystal display are maintained.
The technical solution of the present invention will be described in detail below with specific examples. These particular embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 2 is a flowchart of a driving method of a liquid crystal display according to an embodiment of the invention. As shown in fig. 2, the method of this embodiment may include:
s101, dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel.
The execution subject of the present embodiment is a liquid crystal display (specifically, a processor in the liquid crystal display).
As shown in fig. 1, when different voltages are applied to the liquid crystal molecules, the rotation angles of the liquid crystal molecules are different, and further, light rays with different angles pass through the liquid crystal molecules, for example, as shown in fig. 1, when the liquid crystal molecules rotate to the current angle, the viewing angle of the liquid crystal molecules is 45 ° left and right, and at this time, the viewing angle of the liquid crystal display is 45 ° left and right, so that the viewing angle of the liquid crystal display has a dependency on the rotation angle (i.e., viewing angle) of the liquid crystal molecules.
As shown in fig. 3, the lcd includes a plurality of pixels, each of which includes three sub-pixels, i.e., an R (Red ), a G (Green ), and a B (Blue) sub-pixel. For example, a liquid crystal display with a resolution of 1024 × 768 includes 1024 × 768 pixels, including 3 × 1024 × 768 sub-pixels.
In this embodiment, the adjacent pixels with the preset number in the liquid crystal display shown in fig. 3 are used as a pixel unit, and each sub-pixel in the pixel unit is classified and divided into the pixel regions with the preset number. The preset number is set according to actual needs, and this embodiment does not limit this, and may be, for example, a positive integer such as 2, 3, or 4. When actually dividing the pixel area, the pixel unit is taken as a repeating unit, and the processing procedure of each pixel unit is the same.
It should be noted that, since blue is relatively sensitive to color, in this embodiment, at least one same sub-pixel selected from each pixel point of the pixel unit includes a blue sub-pixel, that is, when a pixel region is divided, the blue sub-pixel of each pixel point in the pixel unit needs to be divided into different pixel regions.
For example, as shown in fig. 4, it is assumed that the preset number is 2, and the corresponding pixel regions are two, namely, pixel region 1 and pixel region 2. At this time, two adjacent pixel points in the liquid crystal display are a pixel unit, and the two adjacent pixel points can be longitudinally adjacent or transversely adjacent. Taking a pixel unit as an example, two pixels in the pixel unit are respectively marked as a pixel point a and a pixel point b. When the pixel regions are divided, one same sub-pixel (namely, a sub-pixel B) of the pixel points a and B is divided into different pixel regions respectively. Specifically, B1 subpixels in the pixel point a are divided into a pixel area 1, B2 subpixels in the pixel point B are divided into a pixel area 2, or B1 subpixels in the pixel point a are divided into a pixel area 2, B2 subpixels in the pixel point B are divided into a pixel area 1, wherein R1 and G1 subpixels in the pixel point a and R2 and G2 in the pixel point B are not divided, and are driven according to a theoretical voltage, wherein the theoretical voltage is a voltage corresponding to an original image signal sent to a liquid crystal display by a TCON (Timer Control Register, logic board).
Optionally, as shown in fig. 5, when dividing the pixel region, two identical sub-pixels in the pixel point a and the pixel point B may also be divided into different pixel regions, for example, as shown in fig. 5, a B1 sub-pixel and an R1 sub-pixel in the pixel point a are respectively divided into the pixel region 1 and the pixel region 2, correspondingly, a B2 sub-pixel and an R2 sub-pixel in the pixel point B are respectively divided into the pixel region 2 and the pixel region 1, and a sub-pixel G in the pixel point a and the pixel point B is not divided.
Optionally, as shown in fig. 6, the same sub-pixel in the pixel points a and b is divided into different pixel regions, and two adjacent sub-pixels in each pixel point are divided into different pixel regions. For example, the R1 sub-pixel and the B1 sub-pixel in the pixel point a and the G2 sub-pixel in the pixel point B are divided into the pixel region 1 and the pixel region 2, and correspondingly, the G1 sub-pixel in the pixel point a and the R2 sub-pixel and the B2 sub-pixel in the pixel point B are divided into the pixel region 2.
When the preset number is 3 or 4, the sub-pixels in the pixel unit may be divided into 3 or 4 pixel regions, as described above.
And S102, driving different pixel areas by using different driving voltages, wherein the average value of the brightness of the same sub-pixel in each pixel area is equal to the preset brightness of the same sub-pixel.
The driving voltages of the present embodiment each include voltages of three sub-pixels (i.e., RGB voltages), for example, V ═ V (V ═ V)R、VG、VB) In which V isRIs the drive voltage of the R sub-pixel, VGIs the driving voltage of the G sub-pixel, VBIs the driving voltage of the B sub-pixel.
Specifically, according to the above steps, the sub-pixels in the pixel unit are divided into a preset number of pixel regions, different driving voltages are applied to the preset number of pixel regions, for example, the pixel region 1, the pixel region 2, and the pixel region 3 are obtained according to the above method, the first driving voltage is applied to the pixel region 1, the second driving voltage is applied to the pixel region 2, and the third driving voltage is applied to the pixel region 3.
As can be seen from the above, taking a pixel unit as an example, the B sub-pixels in the 3 adjacent pixels are respectively located in three different pixel regions, for example, the B sub-pixel in the pixel a is located in the first pixel region, and the first driving voltage is applied to the B sub-pixel, so that the liquid crystal molecules corresponding to the B sub-pixel in the pixel a are rotated under the driving of the first driving voltage. And the B sub-pixel in the pixel point B is positioned in the second pixel area, a second driving voltage is applied to the B sub-pixel, and the liquid crystal molecules corresponding to the B sub-pixel in the pixel point B are rotated under the driving of the second driving voltage. And the B sub-pixel in the pixel point c is positioned in the third pixel area, a third driving voltage is applied to the B sub-pixel, and the liquid crystal molecules corresponding to the B sub-pixel in the pixel point c are rotated under the driving of the third driving voltage.
Since the first driving voltage, the second driving voltage and the third driving voltage are different with respect to the driving voltage of the same sub-pixel and gradually increase or decrease, the rotation directions of the liquid crystal molecules corresponding to the same sub-pixel in the 3 pixels are different, for example, the viewing angle of the liquid crystal molecules is increased by α on the basis of the original viewing angle of 60 °, and then the displayed picture is still really and clearly seen by viewing α +60 ° from the front side.
That is, in the method of this embodiment, different driving voltages are applied to the same sub-pixel in the pixel unit, so that the liquid crystal molecules corresponding to the same sub-pixel rotate in different directions, and the viewing angles of the liquid crystal molecules corresponding to the adjacent pixel points are increased, thereby increasing the viewing angle of the liquid crystal display.
Meanwhile, in this embodiment, the average value of the brightness of the same sub-pixel in each pixel region in the preset number of adjacent pixel points is equal to the preset brightness.
According to the working principle of the liquid crystal display, the color image signals are digital signals before being transmitted to the Source, and the corresponding driving voltage is generated through the D/A conversion module after each color image signal enters the Source according to a corresponding voltage value. The driving voltage of each pixel point can be converted into the driving voltage of 3 sub-pixels, and the driving voltage of 3 sub-pixels is applied to the corresponding electrodes, so that liquid crystal molecules corresponding to the 3 sub-pixels are deflected, light with different intensities is transmitted, color mixing is further formed, and different pictures are displayed on a screen. Therefore, for a picture, each sub-pixel generates a luminance under the driving of a theoretical voltage, which is called the theoretical luminance of the sub-pixel.
Continuing with the above example, assume that the luminance of the B sub-pixel of the pixel a is l1 under the driving of the first driving voltage, the luminance of the B sub-pixel of the pixel B is l2 under the driving of the second driving voltage, and the luminance of the B sub-pixel of the pixel c is l3 under the driving of the third driving voltage. At this time, in order to ensure the display brightness of the liquid crystal display, the average value of the brightness of the same B sub-pixel point in the 3 pixel regions in the adjacent 3 pixel points is equal to the preset brightness l0 of the B sub-pixel, for example, l0 is (l1+ l2+ l 3)/3.
Optionally, the preset brightness of the same pixel may be set by a user according to actual needs.
Optionally, the average value of the theoretical luminances of the same sub-pixel in different pixel regions is used as the preset luminance of the same sub-pixel. Based on the above example, assuming that the theoretical luminance of the B sub-pixel in the pixel a is l4, the theoretical luminance of the B sub-pixel in the pixel B is l5, and the theoretical luminance of the B sub-pixel in the pixel c is l6, the preset luminance l0 of the B sub-pixel is (l4+ l5+ l 6)/3.
Optionally, a central pixel point is obtained from the pixel unit, and the theoretical brightness of the same sub-pixel in the central pixel point is used as the preset brightness of the same sub-pixel. Referring to the above example, the pixel point B is a central pixel point of the pixel unit, and therefore, the theoretical luminance of the B sub-pixel in the pixel point B can be used as the preset luminance of the B sub-pixel.
Therefore, according to the preset brightness determined in the above manner, the driving voltage of the same sub-pixel can be constrained, so that the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel, when the visual angle of the display is increased, the original brightness of the display is maintained, the problem of transmittance reduction caused by more domains of the sub-pixel is avoided, a backlight source is not required to be added, the aperture opening ratio of the display is not required to be changed, and when the visual angle of the display is increased, the manufacturing cost of the display is not increased.
In the driving method of the liquid crystal display provided by the embodiment of the invention, at least one same sub-pixel of each pixel point in the pixel unit is respectively divided into different pixel areas to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and at least one same sub-pixel comprises a blue sub-pixel; different driving voltages are used for driving different pixel regions, so that the rotation angle of liquid crystal molecules corresponding to adjacent pixel points can be increased, and the visual angle of the liquid crystal display can be further increased. Meanwhile, in the embodiment, the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel, so that the original brightness, aperture ratio and light transmittance of the liquid crystal display are maintained.
On the basis of the foregoing embodiment, in a possible implementation manner of this implementation, when the preset number is 3, the step S101 divides at least one same sub-pixel of each pixel point in the pixel unit into different pixel regions, respectively, to obtain a preset number of pixel regions, which may specifically include:
and respectively dividing blue sub-pixels of 3 pixel points in the pixel unit into 3 different pixel areas to obtain 3 pixel areas.
For example, as shown in fig. 7, when the preset number of the pixel regions in this embodiment is 3, the corresponding pixel regions are also 3, which are respectively denoted as pixel regions 1, 2, and 3. At this moment, 3 adjacent pixel points are pixel units, and the 3 adjacent pixel points can be longitudinally adjacent or transversely adjacent. Taking a pixel unit as an example, 3 pixels in the pixel unit are a, b, and c, respectively. When dividing the pixel region, one same sub-pixel (i.e. B sub-pixel) of the 3 pixel points may be divided into different pixel regions, respectively. Specifically, B1 subpixels in the pixel point a are divided into a pixel region 1, B2 subpixels in the pixel point B are divided into a pixel region 2, B3 subpixels in the pixel point c are divided into a pixel region 3, and other subpixels in the pixel points a, B, and c are driven by theoretical voltages without being divided.
The pixel regions 1, 2, and 3 obtained in this way only include B sub-pixels, when the liquid crystal display is driven by different driving voltages, the liquid crystal molecules corresponding to the B sub-pixels in different pixel regions rotate differently, and thus the viewing angle of the liquid crystal molecules corresponding to the B sub-pixels is increased, and since blue light is more color sensitive, when the viewing angle of the liquid crystal molecules corresponding to the B sub-pixels is increased, the viewing angle of the display can be increased.
Alternatively, as shown in fig. 8, with reference to the above example, the present embodiment may also divide the same two sub-pixels into three pixel regions 1, 2, and 3, respectively. For example, B1 sub-pixels in a pixel point a are divided into a pixel region 1, R1 sub-pixels in the pixel point a are divided into a pixel region 3, B2 sub-pixels in the pixel point B are divided into a pixel region 2, R2 sub-pixels in the pixel point B are divided into a pixel region 2, B3 sub-pixels in the pixel point c are divided into a pixel region 3, and R3 sub-pixels in the pixel point c are divided into a pixel region 1.
The pixel regions 1, 2 and 3 obtained in this way all include B sub-pixels and R sub-pixels, and when different driving voltages are used for driving, liquid crystal molecules corresponding to the B sub-pixels and the R sub-pixels in different pixel regions rotate differently, so that the viewing angles of liquid crystal molecules corresponding to the B sub-pixels and the R sub-pixels are increased, and the viewing angles of the display are increased.
In another possible implementation manner of this embodiment, in step S101, the same sub-pixels of 3 pixel points in the pixel unit are respectively divided into 3 different pixel regions, and the 3 different sub-pixels in the same pixel point are respectively divided into 3 different pixel regions, so as to obtain 3 pixel regions.
Specifically, referring to the above example, taking a pixel unit including 3 adjacent pixels as an example, the 3 pixels in the pixel unit are a, b, and c, respectively. When the pixel regions are divided, the same sub-pixels in the 3 pixel points can be divided into different pixel regions respectively, and the 3 sub-pixels in the same pixel point are divided into different pixel regions.
For example, as shown in fig. 9, the R1 sub-pixel of the pixel point a is divided into a first pixel region, the R2 sub-pixel of the pixel point b is divided into a second pixel region, and the R3 sub-pixel of the pixel point c is divided into a third pixel region. Then, the sub-pixel G1 in the pixel point a is divided into a third pixel region, the sub-pixel G2 in the pixel point b is divided into a first pixel region, and the sub-pixel G3 in the pixel point c is divided into a second pixel region. Dividing the B1 sub-pixel in the pixel point a into a second pixel region, dividing the B2 sub-pixel in the pixel point B into a third pixel region, and dividing the B3 sub-pixel in the pixel point c into a first pixel region. At this time, the first pixel region includes sub-pixel points (R1, G2, B3), the second pixel region includes sub-pixel points (R2, G3, B1), the third pixel region includes sub-pixel points (R3, G1, B2), and each pixel region is staggered at intervals in both the horizontal direction and the vertical direction.
Next, when the same sub-pixel in the 3 pixel regions is driven by different driving voltages, as shown in fig. 10, the liquid crystal molecules corresponding to the sub-pixels in different pixel regions rotate differently, so that the adjacent 3 sub-pixel points are overlapped, and the brightness is not changed, but the viewing angle of the liquid crystal molecules is increased, and the viewing angle of the display is further increased.
In another possible implementation manner of this embodiment, the step S102 of driving different pixel regions with different driving voltages may specifically include:
the driving method comprises the steps of driving a first pixel area by using a first driving voltage, driving a second pixel area by using a second driving voltage, and driving a third pixel area by using a third driving voltage, wherein the first brightness generated by the same sub-pixel in the first pixel area is greater than the second brightness generated in the second pixel area, the third brightness generated in the first pixel area is less than the second brightness, and the average value of the first brightness, the second brightness and the third brightness is equal to the theoretical brightness of the same sub-pixel in the central pixel point of the pixel unit.
Specifically, taking 3 adjacent pixels as an example, referring to the above example, it is assumed that the first pixel region (R1, G2, B3), the second pixel region includes sub-pixels (R2, G3, B1), and the third pixel region includes sub-pixels (R3, G1, B2). Then, the 3 pixel regions are driven using different driving voltages.
The first driving voltage, the second driving voltage and the third driving voltage are sequentially increased or decreased, so that the brightness of the first pixel region, the brightness of the second pixel region and the brightness of the third pixel region are gradually increased or decreased, the roughness between adjacent pixel points is weakened, and the display effect of the display is improved.
For example, the first pixel regions (R1, G2, B3) are driven using a first driving voltage such that liquid crystal molecules corresponding to the first pixel regions (R1, G2, B3) rotate. The second pixel regions (R2, G3, B1) are driven by a second driving voltage, so that the liquid crystal molecules corresponding to the second pixel regions (R2, G3, B1) rotate. The third pixel regions (R3, G1, B2) are driven by a third driving voltage so that the liquid crystal molecules corresponding to the third pixel regions (R3, G1, B2) rotate.
Further, taking the R sub-pixel as an example, assuming that fig. 10 is a schematic diagram of the rotation angle of the liquid crystal molecules corresponding to R, R1 in the first pixel region is under the first driving voltage VR1The luminance generated by the driving of (1) is l7, and the rotation state of the liquid crystal molecule corresponding to R1 is a 2. R2 in the second pixel region at the second driving voltage VR2The luminance generated by the driving of (1) is l8, and the rotation state of the liquid crystal molecule corresponding to R2 is A3. Third pixelR3 in the region is at the third driving voltage VR3The luminance generated by the driving of (1) is l9, and the rotating state of the liquid crystal molecules A1 corresponds to R3. The theoretical voltage of R in the central pixel point of the pixel unit is VR0The theoretical brightness is l0, and in this case, l0 ═ l7+ l8+ l 9)/3.
Since the luminance of the sub-pixel is proportional to the driving voltage, when l7>l8>l9, VR1>VR2> VR3。
In this embodiment, the first driving voltage, the second driving voltage, and the third driving voltage are all obtained by converting a theoretical voltage V of a central pixel of the pixel unit, and the first driving voltage is greater than the theoretical voltage, the second driving voltage is greater than, equal to, or less than the theoretical voltage V, and the third driving voltage is less than the theoretical voltage V. As shown in fig. 10, the sub-pixels in each pixel rotate under the different driving voltages, so that the viewing angle of the liquid crystal molecules corresponding to each pixel is increased, and the viewing angle of the liquid crystal display is increased.
Meanwhile, the first brightness generated by the same sub-pixel in the first pixel area is greater than the second brightness generated by the same sub-pixel in the second pixel area, the third brightness generated by the same sub-pixel in the third pixel area is less than the second brightness, and the first brightness, the second brightness and the third brightness are equal to the theoretical brightness of the central pixel point of the pixel unit. Therefore, the total brightness of the 3 adjacent pixel points is not changed by adding, and the original aperture ratio of the liquid crystal display is not changed.
Optionally, the second driving voltage is a theoretical voltage of the central pixel point, the corresponding second brightness is a theoretical brightness of the central pixel point, and an average value of the first brightness and the third brightness is equal to the second brightness. Therefore, the second driving voltage is determined as the theoretical voltage of the central pixel point, the original color of the image can be reserved, the first brightness, the second brightness and the third brightness are gradually changed, and the roughness of the pixel point during close-distance watching is weakened. Meanwhile, the second driving voltage is determined as the theoretical voltage of the central pixel point, so that the determination of the second driving voltage is facilitated, and the process of determining the first driving voltage and the third driving voltage based on the second driving voltage is simpler and more convenient.
In the driving method of the liquid crystal display provided by the embodiment of the invention, the preset number is set to 3, the same sub-pixels in the adjacent 3 pixel points are respectively divided into 3 different pixel regions, and the 3 different sub-pixels in the same pixel point are respectively divided into 3 different pixel regions, so that 3 pixel regions are obtained, and the pixel regions are accurately divided. Then, the 3 pixel regions are driven by 3 different driving voltages respectively, so that the liquid crystal molecules corresponding to the pixel points rotate by different angles, and the viewing angle of the liquid crystal display is further improved.
Fig. 11 is a flowchart of a driving method of a liquid crystal display according to a second embodiment of the invention. On the basis of the above embodiment, the present implementation performs Gamma (Gamma) correction on each driving voltage, as shown in fig. 13, where S102 may specifically include;
and S201, respectively measuring the maximum brightness of each pixel region when the pixel region is driven by the corresponding maximum driving voltage.
In this embodiment, before driving each pixel region with a driving voltage, each driving voltage is corrected with a gamma curve to improve the display effect of the liquid crystal display.
Gamma is a parameter used to characterize the luminance response of a display device, and typically the luminance displayed on a display device is related to the input level by an exponential curve.
The Gamma of a conventional CRT (Cathode Ray Tube) display is 2.2 because such display characteristics are suitable for human visual characteristics. If the Gamma is larger, the whole image feels darker, and details in a dark scene of the image are easy to lose; if the Gamma is small, the whole image feels brighter, the image becomes hazy, and the gradation feeling becomes worse.
Since the luminance response characteristics of the liquid crystal display device are different from those of the CRT due to the difference in the light emission principle, Gamma correction is required for the liquid crystal television in order to obtain an ideal luminance response curve close to the CRT characteristics.
In this embodiment, the driving voltage of each pixel region is different, and each driving voltage needs to be corrected, so that a gamma curve corresponding to each pixel region needs to be obtained.
For example, it is assumed that 3 pixel regions obtained according to the above steps are respectively a first pixel region, a second pixel region and a third pixel region, and the driving voltages respectively corresponding to the 3 pixel regions are a first driving voltage, a second driving voltage and a third driving voltage. First, a first maximum luminance of the first pixel region at the time of maximum driving voltage driving, a second maximum luminance of the second pixel region at the time of maximum driving voltage driving, and a third maximum luminance of the third pixel region at the time of maximum driving voltage driving are measured.
S202, determining a gamma curve of each pixel region based on the maximum brightness of each pixel region.
Specifically, referring to the above example, a first gamma curve of the first pixel region is determined based on the first maximum luminance, a second gamma curve of the second pixel region is determined based on the second maximum luminance, and a third gamma curve of the third pixel region is determined based on the third maximum luminance.
Optionally, the determining the gamma curve of the pixel region based on the maximum brightness specifically may be:
according to the formula Lj (i) ═ Ljmax*(i/max)γDetermining a gamma curve of each pixel region;
wherein Lj (i) is the brightness value of the pixel region j in the gray level i, and LjmaxFor the measured maximum brightness value of the pixel region j, γ is a predetermined gamma value, and max is 2n-1, wherein n is the number of bits of the preset picture.
For example, according to L1(i) ═ L1jmax*(i/max)γDetermining a first gamma curve for the first pixel region according to L2(i) -L2 jmax*(i/max)γDetermining a second gamma curve for the second pixel region according to L3(i) -L3 jmax*(i/max)γAnd determining a third gamma curve of the third pixel region.
S203, correcting the driving voltage corresponding to each pixel region based on the gamma curve of each pixel region, and driving each pixel region using each corrected driving voltage.
Specifically, after the gamma curves of the pixel regions are obtained according to the above steps, the corresponding driving voltages are corrected according to the respective gamma curves. With continued reference to the above example, the first drive voltage is corrected using the first gamma curve, the second drive voltage is corrected using the second gamma curve, and the third drive voltage is corrected using the third gamma curve.
At this time, the 3 Gamma curves of this embodiment can be converted into 3 Gamma tables, and these Gamma tables are stored in a Gamma chip for Gamma correction.
In this embodiment, after Gamma correction is performed on each driving voltage, the pixel region is driven by using the corrected driving voltage, for example, the first pixel region is determined by using the corrected first driving voltage, the second pixel region is determined by using the corrected second driving voltage, and the third pixel region is determined by using the corrected third driving voltage, so that the display effect of the liquid crystal display is improved.
Optionally, in the liquid crystal display of this embodiment, Gamma correction of each driving voltage may be implemented by using one Gamma chip, that is, the 3 Gamma tables are stored in one Gamma chip. Optionally, in this embodiment, a separate Gamma chip may be disposed for each pixel region to implement correction of each driving voltage. For example, 3 Gamma chips are used to correct the driving voltages corresponding to 3 pixel regions, and at this time, the 3 Gamma tables are stored in different Gamma chips.
According to the driving method of the liquid crystal display provided by the embodiment of the invention, the maximum brightness of each pixel area when the corresponding maximum driving voltage is driven is measured respectively; determining a gamma curve of each pixel region based on the maximum brightness of each pixel region; and correcting the driving voltage corresponding to each pixel region based on the gamma curve of each pixel region, and driving each pixel region by using each corrected driving voltage, thereby improving the display effect of the liquid crystal display.
Fig. 12 is a schematic structural diagram of a driving device of a liquid crystal display according to a first embodiment of the present invention, as shown in fig. 14, the driving device of the present embodiment includes:
a dividing unit 110, configured to divide at least one same sub-pixel of each pixel point in a pixel unit into different pixel regions, so as to obtain a preset number of pixel regions, where the pixel unit includes a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel includes a blue sub-pixel;
the driving module 120 is configured to drive different pixel regions with different driving voltages, wherein an average value of luminance of the same sub-pixel in each pixel region is equal to a preset luminance of the same sub-pixel.
In a possible implementation manner of this embodiment, when the preset number is 3, the dividing unit 110 is specifically configured to divide blue sub-pixels of 3 pixel points in the pixel unit into 3 different pixel regions respectively, so as to obtain 3 pixel regions.
In another possible implementation manner of this embodiment, when the preset number is 3, the dividing unit 110 is specifically configured to divide each same sub-pixel of 3 pixel points in the pixel unit into 3 different pixel regions, and divide 3 different sub-pixels in the same pixel point into 3 different pixel regions, so as to obtain 3 pixel regions.
In another possible implementation manner of this embodiment, an average value of theoretical luminances of the same sub-pixel in different pixel regions is used as a preset luminance of the same sub-pixel, where the theoretical luminance is a luminance corresponding to an original image signal;
or, obtaining a central pixel point from the pixel unit, and taking the theoretical brightness of the same sub-pixel in the central pixel point as the preset brightness of the same sub-pixel.
In another possible implementation manner of this embodiment, the driving module 120 is specifically configured to drive the first pixel region with a first driving voltage, drive the second pixel region with a second driving voltage, and drive the third pixel region with a third driving voltage;
wherein a first luminance generated by the same sub-pixel in the first pixel region is greater than a second luminance generated by the same sub-pixel in the second pixel region, a third luminance generated by the same sub-pixel in the first pixel region is less than the second luminance, and an average value of the first luminance, the second luminance, and the third luminance is equal to a theoretical luminance of the same sub-pixel in the central pixel point.
Optionally, the second driving voltage is a theoretical voltage of the central pixel, and the theoretical voltage is a voltage corresponding to the original image signal.
Fig. 13 is a schematic structural diagram of a driving apparatus of a liquid crystal display according to a second embodiment of the present invention, and as shown in fig. 13, a driving module 120 of the present embodiment includes: a measurement unit 121, a determination unit 122, a correction unit 123, and a drive unit 124;
the measuring unit 121 is configured to measure the maximum brightness of each pixel region when the corresponding maximum driving voltage is driven;
the determining unit 122 is configured to determine a gamma curve of each of the pixel regions based on the maximum brightness of each of the pixel regions;
the correcting unit 123 is configured to correct a driving voltage corresponding to each of the pixel regions based on a gamma curve of each of the pixel regions;
the driving unit 124 is configured to drive each of the pixel regions by using each of the corrected driving voltages.
Fig. 14 is a schematic structural diagram of a liquid crystal display according to an embodiment of the present invention, and as shown in fig. 14, the liquid crystal display according to the embodiment includes: a display panel 10 including a plurality of sub-pixels; a driving voltage generator 11 outputting a predetermined number of driving voltages; a register 12 for storing a computer program; the processor 13 is configured to execute the computer program to implement the driving method of the liquid crystal display, which has similar implementation principles and technical effects and is not described herein again.
When at least a part of the functions of the driving method of the liquid crystal display in the embodiment of the present invention are implemented by software, the embodiment of the present invention further provides a computer storage medium, which is used to store computer software instructions for driving the liquid crystal display, and when the computer storage medium runs on a computer, the computer storage medium enables the computer to execute various possible driving methods of the liquid crystal display in the above method embodiments. The processes or functions described in accordance with the embodiments of the present invention may be generated in whole or in part when the computer-executable instructions are loaded and executed on a computer. The computer instructions may be stored on a computer storage medium or transmitted from one computer storage medium to another computer storage medium by wireless (e.g., cellular, infrared, short-range wireless, microwave, etc.) transmission to another website, computer, server, or data center. The computer storage media may be any available media that can be accessed by a computer or a data storage device including one or more available media integrated servers, data centers, and the like. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., SSD), among others.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A method of driving a liquid crystal display, comprising:
dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel;
driving different pixel regions by using different driving voltages, wherein the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel;
taking an average value of theoretical brightness of the same sub-pixel in different pixel regions as preset brightness of the same sub-pixel, wherein the theoretical brightness is brightness corresponding to an original image signal; or, obtaining a central pixel point from the pixel unit, and taking the theoretical brightness of the same sub-pixel in the central pixel point as the preset brightness of the same sub-pixel.
2. The method according to claim 1, wherein the preset number is 3, and the obtaining of the preset number of pixel regions by dividing at least one same sub-pixel of each pixel point in the pixel unit into different pixel regions specifically comprises:
and respectively dividing blue sub-pixels of 3 pixel points in the pixel unit into 3 different pixel areas to obtain 3 pixel areas.
3. The method according to claim 1 or 2, wherein the preset number is 3, and the step of dividing at least one same sub-pixel of each pixel point in the pixel unit into different pixel regions to obtain the preset number of pixel regions specifically includes:
and respectively dividing the same sub-pixel of 3 pixel points in the pixel unit into 3 different pixel regions, and respectively dividing 3 different sub-pixels in the same pixel point into 3 different pixel regions to obtain 3 pixel regions.
4. The method according to claim 3, wherein driving different pixel regions with different driving voltages comprises:
driving the first pixel region using a first driving voltage, the second pixel region using a second driving voltage, and the third pixel region using a third driving voltage;
the first brightness generated by the same sub-pixel in the first pixel area is greater than the second brightness generated by the same sub-pixel in the second pixel area, the third brightness generated by the same sub-pixel in the first pixel area is less than the second brightness, and the average value of the first brightness, the second brightness and the third brightness is equal to the theoretical brightness of the same sub-pixel in the central pixel point.
5. The method according to claim 4, wherein the second driving voltage is a theoretical voltage of the central pixel, and the theoretical voltage is a voltage corresponding to the original image signal.
6. The method according to claim 1, wherein driving different pixel regions with different driving voltages comprises:
determining a gamma curve of each pixel region based on the maximum brightness of each pixel region;
and correcting the driving voltage corresponding to each pixel region based on the gamma curve of each pixel region, and driving each pixel region by using each corrected driving voltage.
7. A driving apparatus of a liquid crystal display, comprising:
the dividing module is used for dividing at least one same sub-pixel of each pixel point in a pixel unit into different pixel areas respectively to obtain a preset number of pixel areas, wherein the pixel unit comprises a preset number of adjacent pixel points in the liquid crystal display, and the at least one same sub-pixel comprises a blue sub-pixel;
the driving module is used for driving different pixel regions by using different driving voltages, and the average value of the brightness of the same sub-pixel in each pixel region is equal to the preset brightness of the same sub-pixel; taking an average value of theoretical brightness of the same sub-pixel in different pixel regions as preset brightness of the same sub-pixel, wherein the theoretical brightness is brightness corresponding to an original image signal; or, obtaining a central pixel point from the pixel unit, and taking the theoretical brightness of the same sub-pixel in the central pixel point as the preset brightness of the same sub-pixel.
8. A liquid crystal display, comprising:
a display panel including a plurality of sub-pixels;
a driving voltage generator outputting a preset number of driving voltages;
a register for storing a computer program;
a processor for executing the computer program to implement the method of driving the liquid crystal display according to any one of claims 1 to 6.
9. A computer storage medium, characterized in that the storage medium stores therein a computer program that, when executed, implements the driving method of the liquid crystal display device of any one of claims 1 to 6.
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