CN106782401A - Control method of display - Google Patents

Abstract

A display control method is applicable to a display, and the display is used to provide a display screen. The control method first provides a first data signal with a first grayscale value. Then, a second data signal is generated according to the first data signal. The second data signal has a second grayscale value and a third grayscale value. Define at least part of the display screen as a correction area. When it is determined that the sub-pixel of the display is used to display the correction area, the first data signal is output to the sub-pixel. When it is determined that the sub-pixel of the display is used for displaying outside the correction area, the second data signal is output to the sub-pixel.

Description

Display Control Method

technical field

The invention relates to a control method of a display.

Background technique

Liquid crystal display screens have the advantages of high image quality, small size, light weight and wide application range, so they are widely used in consumer electronics products such as smart phones, notebook computers, desktop monitors and televisions.

When the user informs the liquid crystal display screen to watch the displayed picture, if the user exceeds the viewing angle range of the liquid crystal display screen, the display picture seen by the user will have a color washout (color washout) depending on the viewing angle position. . Due to the current trend of display towards large size and high resolution, when the size of the display increases, it is easier for users to experience color shift. In one solution, by defining the same sub-pixel as a main pixel and a sub-pixel, the main pixel and the sub-pixel are respectively electrically connected to different data lines and the same scanning line, the main pixel and the sub-pixel of the same sub-pixel are respectively driven according to different gray scale values. Such a structure or driving method may be called a 2D1G structure or driving method. Although the structure of 2D1G can overcome the problem of large-screen role deviation, it will cause the problem of rhombic pattern in the monochrome block in the display screen, or the problem of jagged edges in the image in the display screen, resulting in the problem of solving color cast. A dilemma occurs when a problem occurs.

Contents of the invention

The technical problem to be solved by the present invention is to provide a control method of a display, so as to alleviate the rhombus or jagged edges when solving the color shift problem of the display.

In order to achieve the above object, the present invention provides a control method for a display, the control method is suitable for a display, and the display is used to provide display images. The control method first provides a first data signal with a first grayscale value. Next, a second data signal is generated according to the first data signal. The second data signal has a second grayscale value and a third grayscale value. The portion of the display that defines the display is the correction area. It is judged whether the sub-pixel corresponding to the first data signal is used to display the correction area. When it is determined that the sub-pixel is used to display the correction area, the first data signal is output to the sub-pixel. When it is determined that the sub-pixel is used for displaying outside the correction area, the second data signal is output to the sub-pixel.

The invention discloses another control method of a display panel. The control method is suitable for a display, and the display is used to provide display images. In the control method, the first data signal with the first grayscale value is provided first. The first data signal corresponds to a sub-pixel. The portion of the display that defines the display is the correction area. It is judged whether the sub-pixel is used to display the correction area in the display screen. When it is determined that the sub-pixel is used to display the correction area, the first data signal is output to the sub-pixel. When it is determined that the sub-pixel is used to display outside the correction area, a second data signal is generated according to the gray scale value of the first data signal, the second data signal has a second gray scale value and a third gray scale value, and the second data signal is output to the subpixel.

Technical effect of the present invention is:

To sum up the above, the present invention provides a control method of a display panel, by selectively providing the first gray scale value to the sub-pixels or providing the second gray scale value and the third gray scale value to the sub-pixels, in order to While solving the problem of color cast, avoid the problem of diamond pattern or jagged edges.

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

Description of drawings

FIG. 1 is a schematic flowchart of a method for controlling a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a correction area compensation screen according to an embodiment of the present invention;

FIG. 3A is a functional block diagram of a display frame compensator according to an embodiment of the present invention;

3B is a functional block diagram of a display frame compensator according to another embodiment of the present invention;

FIG. 4A is a schematic diagram of a display screen of a display panel according to a comparative embodiment of the present invention;

FIG. 4B is a schematic diagram of a display screen of a display panel according to an embodiment of the invention.

Among them, reference signs

10, 20 picture compensator

110, 210 edge detection module

130, 230 first gamma correction module

150, 250 Second gamma correction module

170, 270 processing modules

290 output modules

IMG display screen

S1 first data signal

S1’ first calibration signal

S1” second correction signal

S2 second data signal

SC control signal

Z1 operating area

Z2 background area

Z3, Z3' experimental area

detailed description

Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a method for controlling a display panel according to an embodiment of the present invention. In step S101, a first data signal having a first grayscale value is provided. Then in step S103, a second data signal is generated according to the first data signal, wherein the second data signal has a second grayscale value and a third grayscale value. In step S105, at least part of the display screen is defined as a correction area. In step S106, it is determined whether the sub-pixel corresponding to the first data signal is used to display the corrected area of the display screen. In step S107 , when it is determined that the sub-pixels of the display are used to display the correction area, the first data signal is output to the sub-pixels. In step S109 , when it is determined that the sub-pixels of the display are used for displaying a display image outside the correction area, a second data signal is output to the sub-pixels.

As mentioned above, the control method shown in FIG. 1 is applicable to a display (not shown) to control the display images provided by the display. The display adopts a 2D1G pixel structure, that is, each sub-pixel in a pixel array composed of multiple sub-pixel rows and multiple sub-pixel columns has at least two sub-pixels that are electrically connected to two data lines and one scanning line, respectively. The data signals of each sub-pixel can be independently controlled, for example, data signals with different gray scales. Please also refer to FIG. 2 to illustrate the display screen provided by the monitor. FIG. 2 is a schematic diagram of a correction area compensation screen according to an embodiment of the present invention. FIG. 2 shows a display screen IMG of the display. The display screen IMG has, for example, an operation area Z1, and the area outside the operation area Z1 is, for example, defined as a background area Z2. Those skilled in the art should understand that, as the electronic devices electrically connected to the display perform different operations, the display screen IMG may have more than one operation area Z1, or the display screen IMG may not have any operation area Z1 but only a background area. Z2, or the entirety of the display screen IMG may also be defined as the operation area Z1, not limited to those shown in the drawings. Here, FIG. 2 is taken as an example for the following description. Wherein, the operation area Z1 is, for example, an operation interface of an on-screen video control system (On-Screen Display, OSD) or a window interface of a Windows operating system of Microsoft Corporation, and the display is, for example, a liquid crystal display (liquid crystal display, LCD), but not limited thereto.

Please refer to FIG. 3A for illustration. FIG. 3A is a functional block diagram of a display frame compensator according to an embodiment of the present invention. The display frame compensator 10 is configured to execute the method corresponding to FIG. 1 . The display frame compensator 10 has an edge detection module 110 , a first gamma correction module 130 , a second gamma correction module 150 and a processing module 170 . The edge detection module 110 is electrically connected to the first gamma correction module 130 , the second gamma correction module 150 and the processing module 170 . The first data signal S1, the first correction signal S1', the second correction signal S1" and the second data signal S2 are marked in FIG. 3A. The edge detection module 110, the first gamma correction module 130, and the second gamma correction module 150 and the processing module 170 are used for receiving the first data signal S1. The edge detection module 110 is further used for receiving the first corrected signal S1' and the second corrected signal S1". The processing module 170 further receives the control signal SC. In practice, the above-mentioned modules are integrated into a single integrated circuit (integrated circuit, IC) or implemented as individual integrated circuits, for example.

The first gamma correction module 130 is used for generating a first correction signal S1' according to the first data signal S1 and the first gamma curve. The second gamma correction module 150 is used to generate a second correction signal S1″ according to the first data signal S1 and the second gamma curve. The first data signal S1 has a first grayscale value. The first gamma curve and the second gamma curve The Ma curve is, for example, corresponding to a gamma function with different gamma values. The first correction signal S1' has a first correction grayscale value. The second correction signal S1" has a second correction grayscale value. In more detail, the first gamma correction module 130 and the second gamma correction module 150 respectively perform different gamma corrections on the first data signal S1 to generate a first correction signal S1' and a second correction signal S1" The first gamma correction module 130 corrects the first grayscale value according to the first gamma curve S1' to generate the first corrected grayscale value. The second gamma correction module 150 corrects the first grayscale value according to the second gamma curve And the second corrected gray scale value is generated. And the gamma value of the first gamma correction curve is different from the gamma value of the second gamma correction curve, so the first corrected gray scale value is different from the second corrected gray scale value.

The edge detection module 110 is used to generate the second data signal S2 according to the first data signal S1, the first correction signal S1' and the second correction signal S1". The second data signal S2 has a second gray scale value and a third gray scale value value, and the second grayscale value and the third grayscale value are respectively associated with the first corrected grayscale value in the first corrected signal S1' and the second corrected grayscale value in the second corrected signal S1". Wherein, the first grayscale value, the second grayscale value and the third grayscale value generated according to the first grayscale value are selectively provided to the same sub-pixel, so that the sub-pixels are correspondingly displayed. In more detail, the sub-pixel corresponding to the first gray scale value further defines, for example, a main area and a sub-area. When the sub-pixel is driven in a 1D1G manner, the data signal with the first gray scale value is simultaneously provided For the main area and the sub-area, the main area and the sub-area are selectively displayed according to the data signal of the first gray scale value. When the sub-pixels are driven in a 2D1G manner, the data signals with the second grayscale value and the third grayscale value are provided to the main area and the sub-area respectively, so that the main area and the sub-area respectively correspond to the second gray-scale value and the sub-area The data signal of the third gray scale value is selectively displayed. By means of the above method, the sub-pixel can be applied to the 1D1G driving method or the 2D1G driving method.

In one embodiment, the edge detection module 110 is used to determine whether the first grayscale value in the first data signal S1 corresponds to a sub-pixel located at the edge of the image, or whether the data signal of the first grayscale value is used to drive Subpixels located at the edge of the image. When the edge detection module 110 judges that the first grayscale value in the first data signal S1 indeed corresponds to a sub-pixel located at the edge of the image, the edge detection module 110 compensates the first grayscale value or compensates the first The corrected grayscale value and the second corrected grayscale value to avoid the problem of jagged edges. The jagged edge compensation algorithm described above can be selected by those skilled in the art according to actual needs after carefully reading this specification, and no limitation is imposed here.

In more detail, FIG. 3A shows a pixel by pixel architecture, that is to say, the edge detection module 110, the first gamma correction module 130, the second gamma correction module 150 and The processing module 170 sequentially receives the first data signal S1 with different first grayscale values, and sequentially generates the first correction signal S1 ′, the second correction signal S1 ″ and the second data signal S2 as mentioned above. From another From one point of view, the edge detection module 110, the first gamma correction module 130, the second gamma correction module 150 and the processing module 170 sequentially obtain the first grayscale value, and generate the first corrected grayscale value, The second corrected grayscale value, thereby generating a second grayscale value and a third grayscale value.

The processing module 170 selectively provides the first grayscale value to the sub-pixel according to the instruction of the control signal SC, or provides the second grayscale value and the third grayscale value to the main area and the sub-area of the same sub-pixel respectively . When the processing module 170 provides the first grayscale value to the sub-pixel, the sub-pixel is driven in a 1D1G manner. When the processing module 170 provides the second gray scale value and the third gray scale value to the main area and the sub area of the sub-pixel respectively, the sub-pixel is driven in a 2D1G manner.

Please refer to FIG. 1 , FIG. 2 and FIG. 3A together. The control signal SC is for example used to indicate the position of the sub-pixel corresponding to the current first gray scale value in the display screen IMG. In one embodiment. The operating zone Z1 is defined as the correction zone as described in FIG. 1 . That is to say, when the control signal SC indicates that the sub-pixel is located in the background area Z2 outside the operation area Z1, the processing module 170 provides the second gray scale value and the third gray scale value to the sub-pixel. That is to say, the sub-pixels outside the operation area Z1 are driven in a 2D1G manner. When the control signal SC indicates that the sub-pixel is located in the operation area Z1, the processing module 170 provides the first grayscale value to the sub-pixel, that is, drives the sub-pixel in the operation area Z1 in a 1D1G manner.

More specifically, the control signal SC is for example used to indicate a plurality of coordinate points associated with the operation area Z1 relative to the display screen, and the processing module 170 defines the range of the operation area Z1 in the display screen IMG according to the coordinate points. Moreover, the sub-pixel also has a coordinate point relative to the display screen IMG, and the processing module 170 judges whether the sub-pixel is located in the range of the operation zone Z1 according to the plurality of coordinate points. In an embodiment, the plurality of coordinate points associated with the operation area Z1 are, for example, a plurality of vertices on the edge of the operation area. In another embodiment, the control signal SC is, for example, used to indicate an initial coordinate point and an area or a shape associated with the coordinate region, and the processing module 170 defines an operation according to the initial coordinate point and the area or shape The range of the zone Z1, based on which the processing module 170 determines whether the sub-pixel is located in the range of the operation zone Z1. In yet another embodiment, the processing module 170 is used to determine whether there is a single-color area in the display screen IMG whose area is larger than a preset value. When the processing module 170 determines that there is a monochrome area in the display image IMG with an area larger than a preset value, the processing module 170 defines the monochrome area as a correction area. In an embodiment, the processing module 170 has a buffer, for example, which is used to temporarily store the related data of the sub-pixels with the same color, so that the processing module 170 can judge whether the size of the monochromatic region is larger than a default value.

Please refer to FIG. 3B again to illustrate another embodiment of the present invention. FIG. 3B is a functional block diagram of a display frame compensator according to another embodiment of the present invention. In the embodiment shown in FIG. 3B , the display frame compensator 20 further has an output module 290 , and the output module 290 is electrically connected to the processing module 270 and the edge detection module 210 . What is different from the embodiment shown in FIG. 3A is that in this embodiment, the processing module 270 is electrically connected to the edge detection module 210, the first gamma correction module 230 and the second gamma correction module 250, and the processing module 270 selectively provides the first data signal S1 to the output module 290 according to the instruction of the control signal SC or provides the first data signal S1 to the edge detection module 210, the first gamma correction module 230 and the second gamma correction module 250.

In one embodiment, when the control signal SC indicates that the sub-pixel is located in the correction area, the processing module 270 provides the first data signal S1 to the output module 290 according to the control signal SC, and the first data signal S1 is provided to the sub-pixel. main area and sub area. At this time, the sub-pixels are driven according to the first gray scale value in the first data signal S1. When the control signal SC indicates that the sub-pixel is outside the correction area, the processing module 270 provides the first data signal S1 to the edge detection module 210, the first gamma correction module 230 and the second gamma correction module according to the control signal SC. 250. The first gamma correction module 230 and the second gamma correction module 250 respectively generate the first correction signal S1' and the second correction signal S1" as mentioned above, and the edge detection module is based on the first data signal S1, the first correction signal S1' and the second correction signal S1" to generate a second data signal S2 for the sub-pixel. At this time, the sub-pixels are driven according to the second grayscale value and the third grayscale value in the second data signal S2.

As mentioned above, depending on whether the sub-pixel is located outside the correction area or within the correction area, the processing module 270 selectively provides the first data signal S1 to the output module 290 or provides the first data signal S1 to the edge detection module 210, the first gamma A gamma correction module 230 and a second gamma correction module 250 . In one embodiment, according to whether the processing module 270 provides the first data signal S1, the edge detection module 210, the first gamma correction module 230 and the second gamma correction module 250 can be selectively enabled or disabled. Can (disable), and can save system power consumption.

Please refer to FIG. 4A and FIG. 4B to illustrate the effect achieved by the control method with a practical example. FIG. 4A is a schematic diagram of a display screen of a display panel according to a comparative embodiment of the present invention. FIG. 4B is a schematic diagram of a display screen of a display panel according to an embodiment of the invention. Fig. 4A shows a display screen IMG' without using the control method provided by the present invention, and the display screen IMG' has an experimental area Z3'. The experimental area Z3' obviously has obvious diamond pattern and jagged edges. FIG. 4B shows a display screen IMG adjusted by using the control method provided by the present invention, and the display screen IMG has an experimental area Z3. As shown in FIG. 4B , the rhombic patterns and jagged edges in the experimental area Z3' are obviously less obvious than those in the experimental area Z3 in the display screen IMG.

In summary, the present invention provides a method for controlling a display panel by selectively providing the first gray scale value to the sub-pixels or providing the second gray scale value and the third gray scale value to the sub-pixels. In an embodiment, the second grayscale value and the third grayscale value are obtained according to the first grayscale value, and the second grayscale value and the third grayscale value respectively correspond to different gamma values, and the second grayscale value The second gray scale value and the third gray scale value respectively correspond to the main area and the sub area in the sub-pixel. In one embodiment, when a correction area is defined in the display, the sub-pixels in the correction area will be provided with the data signal of the first gray scale value, and the sub-pixels outside the correction area will be provided with the second gray scale value data signal with a third gray scale value. In this way, different adjustments can be made to different areas in the same display image, so as to solve the problem of color shift and avoid the problem of rhombic lines or jagged edges on the display image.

Certainly, the present invention also can have other multiple embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding Changes and deformations should belong to the scope of protection of the appended claims of the present invention.

Claims (6)

1. A control method for a display, suitable for a display, the display is used to provide a display screen, characterized in that the control method comprises: providing a first data signal with a first gray scale value; generating a second data signal according to the first data signal, wherein the second data signal has a second grayscale value and a third grayscale value; defining a portion of the display screen as a correction area; judging whether a sub-pixel corresponding to the first data signal is used to display the correction area; outputting the first data signal to the sub-pixel when it is determined that the sub-pixel is used to display the correction area; and When it is determined that the sub-pixel is used to display outside the correction area, the second data signal is output to the sub-pixel. 2. A control method for a display, suitable for a display, the display is used to provide a display screen, characterized in that the control method comprises: providing a first data signal having a first grayscale value, the first data signal corresponding to a sub-pixel; defining a portion of the display screen as a correction area; judging whether the sub-pixel is used to display the correction area in the display screen; outputting the first data signal to the sub-pixel when it is determined that the sub-pixel is used to display the correction area; and When it is judged that the sub-pixel is used to display outside the correction area, a second data signal is generated according to the first data signal, wherein the second data signal has a second grayscale value and a third grayscale value, and output The second data signal is sent to the sub-pixel. 3. The control method according to claim 1 or claim 2, further comprising providing a display control signal, wherein the aforementioned step of defining the display image as the correction area includes the display image according to the display control signal The part in is defined as the correction area. 4. The control method according to claim 3, wherein when the display control signal is received, in the step of defining the part of the display screen as the correction area according to the display control signal, according to the display The control signal obtains a plurality of coordinates corresponding to the correction area in the display screen, and defines the correction area according to the coordinates. 5 . The control method according to claim 3 , further comprising defining the monochrome region as the correction region when it is determined that the area of a monochrome region in the display screen is larger than a preset value. 6 . 6. The control method according to claim 1 or claim 2, wherein the second grayscale value and the third grayscale value of the second data signal respectively correspond to a main area in the sub-pixel with a pair of regions.