TWI603314B - Display control method - Google Patents

Description

Display control method

The present invention relates to a method of controlling a display.

LCD screens are widely used in consumer electronics such as smart phones, notebook computers, desktop displays, and televisions because of their high image quality, small size, light weight, and wide application range.

When the user views the displayed screen through the liquid crystal display screen, if the user exceeds the viewing angle range of the liquid crystal display screen, the display screen seen by the user may cause a color washout along with the viewing angle position. Due to the current trend toward large size and high resolution of displays, when the size of the display is increased, it is easier for the user to feel the color shift. In one solution, by defining the same sub-pixel as the primary pixel and the secondary pixel, the primary pixel and the secondary pixel are electrically connected to different data lines and the same scanning line, respectively, and the same sub-pixel. The main and sub-picture elements of the pixel are driven according to different gray scale values. Such a structure or driving method may be referred to as a 2D1G structure or driving method. Although the structure of 2D1G can overcome the problem of the role of the big view, it will cause the problem of the plaid in the monochrome block in the display, or the problem of the jagged edge of the image in the display. A dilemma occurs when the problem is partial.

The present invention provides a control method for a display panel to slow down a plaid or a jagged edge when solving a color shift problem of the display.

The invention discloses a control method of a display panel. The control method is suitable for a display, and the display is used for providing a display screen. The control method first provides a first data signal having a first grayscale value. Then, the 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 part defining the display screen 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 the sub-pixel is used to display the correction area, the first data signal is output to the sub-pixel. When the sub-pixel is used to display the correction area, the second data signal is output to the sub-pixel.

Another method for controlling a display panel is disclosed. The control method is suitable for a display, and the display is used to provide a display screen. In the control method, the first data signal having the first grayscale value is first provided. The first data signal corresponds to the sub-pixel. The part defining the display screen is the correction area. It is judged whether or not the sub-pixel is used to display the correction area in the display screen. When it is judged that the sub-pixel is used to display the correction area, the first data signal is output to the sub-pixel. When the sub-pixel is used to display the correction area, the second data signal is generated according to the first data signal gray level value, and the second data signal has the second gray level value and the third gray level value, and outputs the second data. Signal to sub-picture.

In summary, the present invention provides a control method for a display panel, by selectively providing a first grayscale value to a subpixel or providing a second grayscale value and a third grayscale value to a subpixel, While solving the color shift problem, avoid the problem of plaid or jagged edges.

The above description of the disclosure and the following description of the embodiments of the present invention are intended to illustrate and explain the spirit and principles of the invention, and to provide further explanation of the scope of the invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Please refer to FIG. 1. FIG. 1 is a schematic flow chart of a control method of a display panel according to an embodiment of the invention. In step S101, a first data signal is provided, having a first grayscale value. Next, 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 a sub-pixel corresponding to the first data signal is used to display a correction area of the display screen. In step S107, 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. In step S109, when it is determined that the sub-pixel of the display is used to display a display screen other than the correction area, the second data signal is outputted to the sub-pixel.

As described above, the control method shown in FIG. 1 is applied to a display (not shown) to control the display screen provided by the display. The display adopts a 2D1G pixel structure, that is, each sub-pixel in a pixel array composed of a plurality of sub-pixel rows and a plurality of sub-pixel columns has at least two sub-pixels electrically connected to two data lines respectively. And a scan line for independently controlling the data signals of each pixel, such as data signals having different gray levels. Please refer to FIG. 2 to illustrate the display screen provided by the display. FIG. 2 is a schematic diagram of the modified area compensation screen according to an embodiment of the invention. Figure 2 shows the display picture IMG of the display. The display screen IMG has, for example, an operation area Z1, and the operation area Z1 is defined, for example, as a background area Z2. However, those skilled in the art should be able to understand that the display screen IMG may have more than one operation area Z1, or the display screen IMG may not have any operation area, as the electronic devices electrically connected to the display perform different operations. Z1 and only the background area Z2, or all of the display screen IMG may be defined as the operation area Z1, not limited to those depicted in the drawings. Here, the following description will be made by taking FIG. 2 as an example. The operation area Z1 is, for example, an operation interface of an On-Screen Display (OSD) or a window interface of a Microsoft (Windows) operating system, and the display is, for example, a liquid crystal display (liquid crystal display, LCD), but not limited to this.

3A is a functional block diagram of a display screen compensator according to an embodiment of the invention. The display screen compensator 10 is used to perform the method corresponding to FIG. The display screen 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 indicated in FIG. 3A. The edge detection module 110, the first gamma correction module 130, and the second gamma The MM module 150 and the processing module 170 are configured to receive the first data signal S1. The edge detection module 110 is further configured to receive the first correction signal S1 ′ and the second correction signal S1 ′′. The processing module 170 further receives the control signal SC. In practice, the above modules are integrated into, for example, a single integrated circuit (IC) or separately implemented as individual integrated circuits.

The first gamma correction module 130 is configured to generate a first correction signal S1' according to the first data signal S1 and the first gamma curve. The second gamma correction module 150 is configured 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 gray level value. The first gamma curve and the second The gamma curve corresponds, for example, to a gamma function having a different gamma value. The first correction signal S1' has a first corrected grayscale value. The second correction signal S1" has a second corrected 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 respectively generate the first correction signal S1 ′ and the second correction. The first gamma correction module 130 generates a first corrected grayscale value according to the first gamma curve S1' to correct the first grayscale value. The second gamma correction module 150 corrects according to the second gamma correction curve. a first gray scale value to generate a second corrected gray scale value, and a gamma value of the first gamma correction curve is different from a gamma value of the second gamma correction curve, so the first corrected gray scale value is different from the first Second, correct the grayscale value.

The edge detection module 110 is configured to generate a 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 level value and a third The grayscale value, and the second grayscale value and the third grayscale value are respectively associated with the first corrected grayscale value in the first correction signal S1' and the second corrected grayscale value in the second corrected signal S1". The first grayscale value and the second grayscale value and the third grayscale value generated according to the first grayscale value are selectively provided to the same subpixel, so that the subpixel corresponds to display. In more detail, the sub-pixel corresponding to the first gray-scale value is further defined, for example, by a main area and a sub-area. When the sub-pixel is driven by 1D1G, the data signal having the first gray-scale value is At the same time, the main area and the sub-area are provided, so that the main area and the sub-area are selectively displayed according to the data signal of the first gray level value. When the sub-pixel is driven in the 2D1G manner, the data signals having the second grayscale value and the third grayscale value are respectively supplied to the main region and the sub-region, so that the main region and the sub-region are respectively according to the second grayscale value. The data signal with the third gray scale value is selectively displayed. In the above manner, the sub-pixel can be applied to the driving mode of 1D1G or the driving mode of 2D1G.

In an embodiment, the edge detection module 110 is configured to determine whether the first grayscale value in the first data signal S1 corresponds to a sub-pixel located at an edge of the image, or a data of a first grayscale value. Whether the signal is used to drive a sub-pixel located at the edge of the image. When the edge detection module 110 determines that the first grayscale value in the first data signal S1 corresponds to the sub-pixel located at the edge of the image, the edge detection module 110 compensates the first gray with the corresponding sawtooth edge compensation algorithm. The order value compensates for the first corrected gray scale value and the second corrected gray scale value to avoid the problem of jagged edges. The sawtooth edge compensation algorithm is generally available to those skilled in the art after having read the present specification, and may be selected according to actual needs, and is not limited herein.

In more detail, FIG. 3A shows a pixel by pixel architecture, that is, the edge detection module 110, the first gamma correction module 130, and the second gamma correction. The module 150 and the processing module 170 sequentially receive the first data signal S1 having different first grayscale values, and sequentially generate the first correction signal S1', the second correction signal S1" and the second according to the foregoing. The information signal S2. From another perspective, 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 generating a first corrected grayscale value and a second corrected grayscale value as described above, thereby generating a second grayscale value and a third grayscale value.

The processing module 170 selectively supplies the first grayscale value to the subpixel according to the indication of the control signal SC, or provides the second grayscale value and the third grayscale value to the master of the same subpixel respectively. Area and sub-area. When the processing module 170 provides the first grayscale value to the subpixel, the subpixel is driven according to the 1D1G mode. When the processing module 170 provides the second grayscale value and the third grayscale value to the primary region and the secondary region of the subpixel, respectively, the subpixel is driven according to the 2D1G mode.

Referring to FIG. 1 , FIG. 2 and FIG. 3A together, the control signal SC is used to indicate, for example, the position of the sub-pixel corresponding to the current first gray scale value in the display screen IMG. In an embodiment. The operation area Z1 is defined as a correction area as described in FIG. That is, 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 supplies the second gray level value and the third gray level 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 supplies the first gray level value to the sub-pixel, that is, drives the sub-pixel in the operation area Z1 in a 1D1G manner. .

In more detail, the control signal SC is used to indicate, for example, a plurality of coordinate points associated with the operation area Z1 with respect to the display screen, and the processing module 170 defines the range of the operation area Z1 in the display screen IMG based on the coordinate points. Moreover, the sub-pixel has a coordinate point relative to the display image IMG, and the processing module 170 determines whether the sub-pixel is located in the range of the operation area 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 at the edge of the operation area. In another embodiment, the control signal SC is used to indicate, for example, a starting coordinate point associated with the coordinate area and an area or a shape, and the processing module 170 is defined according to the starting coordinate point and the area or shape. Out of the range of the operation area Z1, the processing module 170 determines whether the sub-pixel is located in the range of the operation area Z1. In a further embodiment, the processing module 170 is configured to determine whether an area of a monochrome area in the display image IMG is greater than a preset value. When the processing module 170 determines that the area size of a monochrome area in the display screen IMG is greater than a predetermined value, the processing module 170 defines the monochrome area as the correction area. In an embodiment, the processing module 170 has, for example, a buffer for temporarily storing related data of sub-pixels having the same color, for the processing module 170 to determine the monochrome area. Whether the size is greater than a preset value.

Referring to FIG. 3B again, another embodiment of the present invention is illustrated. FIG. 3B is a functional block diagram of a display screen compensator according to another embodiment of the present invention. In the embodiment shown in FIG. 3B , the display screen 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 . The difference 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 supplies the first data signal S1 to the output module 290 according to the indication of the control signal SC or provides the first data signal S1 to the edge detection module 210, the first gamma The calibration module 230 and the second gamma correction module 250.

In an 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. The main and sub-regions of the sub-pixel. At this time, the sub-picture is driven according to the first gray level value in the first data signal S1. When the control signal SC indicates that the sub-pixel is located 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 first according to the control signal SC. Two gamma correction module 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 described above, and the edge detection module is configured according to the first data signal S1 and the first The correction signal S1' and the second correction signal S1" generate a second data signal S2 to the sub-pixel. At this time, the sub-pixel is driven according to the second grayscale value and the third grayscale value in the second data signal S2.

As described above, the processing module 270 selectively provides the first data signal S1 to the output module 290 or the first data signal S1 to the edge detection module according to the sub-picture element being located outside the correction area or within the correction area. The group 210, the first gamma correction module 230 and the second gamma correction module 250. In an embodiment, the edge detection module 210, the first gamma correction module 230, and the second gamma correction module 250 can be selectively caused according to whether the processing module 270 provides the first data signal S1. Can be enabled or disabled to save system power.

4A and FIG. 4B, the actual effect of the control method is illustrated by using a practical example. FIG. 4A is a schematic diagram of a display screen of the 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' which does not use the control method provided by the present invention, and the display screen IMG' has an experimental area Z3'. The experimental zone Z3' clearly has a distinct rhombic and jagged edge. FIG. 4B shows a display screen IMG adjusted 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 and jagged edges of the experimental region Z3' are apparently less pronounced than the experimental region Z3 in the display image IMG.

In summary, the present invention provides a control method for a display panel by selectively providing a first grayscale value to a subpixel or providing a second grayscale value and a third grayscale value to a subpixel. In an embodiment, the second grayscale value and the third grayscale value are, for example, 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 and the third grayscale value system respectively correspond to the primary region and the secondary region in the subpixel. In an embodiment, when a correction area is defined in the display, the sub-pixel in the correction area is provided to the data signal of the first gray level value, and the sub-pixel outside the correction area is provided to the second gray The data signal of the order value and the third gray scale value. Thereby, different adjustments can be made to different areas in the same display screen, so as to solve the problem of color shift, and avoid the problem that the display screen has a rhombic pattern or a jagged edge.

Although the present invention has been disclosed above in the foregoing embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

10, 20‧‧‧ picture compensator

110, 210‧‧‧ Edge Detection Module

130, 230‧‧‧First gamma correction module

150, 250‧‧‧second gamma correction module

170, 270‧‧‧ processing module

290‧‧‧Output module

IMG‧‧‧ display screen

S1‧‧‧ first information signal

S1’‧‧‧ first correction signal

S1”‧‧‧second correction signal

S2‧‧‧Second information signal

SC‧‧‧Control signal

Z1‧‧‧ operating area

Z2‧‧‧Background area

Z3, Z3’‧‧‧ experimental area

FIG. 1 is a schematic flow chart of a control method of a display panel according to an embodiment of the invention. FIG. 2 is a schematic diagram of a modified area compensation screen according to an embodiment of the invention. FIG. 3A is a functional block diagram of a display screen compensator according to an embodiment of the invention. FIG. 3B is a functional block diagram of a display screen compensator according to another embodiment of the invention. 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.

Claims (5)

A display control method is applicable to a display for providing a display screen, the control method includes: providing a display control signal; providing a first data signal having a first grayscale value; The signal generates a second data signal, wherein the second data signal has a second gray level value and a third gray level value; and the portion of the display screen is defined as a correction area according to the display control signal; Whether a sub-pixel of a data signal is used to display the correction region; when determining that the sub-pixel is used to display the correction region, outputting the first data signal to the sub-pixel; and when determining the sub-pixel system For displaying the correction area, outputting the second data signal to the sub-pixel. A display control method is applicable to a display for providing a display screen, the control method includes: providing a display control signal; providing a first data signal having a first gray scale value, the first data The signal corresponds to a sub-pixel; the part of the display screen is defined as a correction area according to the display control signal; determining whether the sub-pixel is used to display the correction area in the display screen; when determining that the sub-pixel is used for Displaying the correction area, outputting the first data signal to the sub-pixel; Determining, by the first data signal, a second data signal, wherein the second data signal has a second gray level value and a third gray level value, and The second data signal is outputted to the sub-pixel. The control method of claim 1 or claim 2, wherein when the display control signal is received, the portion of the display screen is defined 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. The control method according to claim 1 or claim 2, further comprising defining the monochrome area as the correction area when determining that an area size of a monochrome area in the display screen is greater than a preset value. The control method of claim 1 or claim 2, wherein the second grayscale value and the third grayscale value of the second data signal respectively correspond to a primary region and a secondary region of the subpixel .