TW201820307A - Control method for display - Google Patents

Abstract

A control method is configured for a display. The display is configured to provide display image. In the control method, a first data signal is provided first. The first data signal includes s first gray level value. A second data signal is generated according to the first data signal. The second data signal includes a first gray level value and a second gray level value. At least part of the display image is defined as a correcting area. When a sub-pixel of the display is configured to display the correcting area, the first data signal is outputted to the sub-pixel. When the sub-pixel of the display is configured to display the display image out of the correcting area, the second data signal is outputted to the sub-pixel.

Description

Control method of display

The invention relates to a method for controlling a display.

LCD screens have the advantages of high picture quality, small size, light weight, and wide range of applications, so they are widely used in consumer electronics such as smart phones, notebook computers, desktop displays, and televisions.

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 will have a color washout with the viewing angle position. Due to the current trend of large-size displays and high-resolution displays, when the size of the display increases, it is easier for users to feel color deviation. In one solution, the same sub-pixel is defined as the primary and secondary pixels, and the primary and secondary pixels are electrically connected to different data lines and the same scan line, respectively. The primary and secondary pixels of a pixel are driven according to different grayscale values, respectively. 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 large-view characters, it will cause the problem of rhombus in the monochromatic blocks in the display screen, or the problem of jagged edges in the image in the display screen, resulting in the problem of solving color A dilemma occurs when there are partial problems.

The present invention is to provide a method for controlling a display panel, so as to reduce the phenomenon of rhombus or jagged edges when solving the problem of color misregistration of a display.

The invention discloses a control method for a display panel. The control method is suitable for a display, and the display is used to provide a display screen. The control method first provides a first data signal with a first gray level 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 the part of the display screen as the correction area. Determine 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 the sub-pixel is judged to be used outside the display correction area, a 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 a display screen. In the control method, a first data signal having a first gray level value is first provided. The first data signal corresponds to a sub-pixel. Define the part of the display screen as the correction area. Determine whether the sub-pixel is used in the correction area in the display screen. When the judgment sub-pixel is used for displaying the correction area, the first data signal is output to the sub-pixel. When the judging pixel is used to display outside the correction area, a second data signal is generated according to the first data signal gray level value, the second data signal has the second gray level value and the third gray level value, and the second data is output Signal to sub-pixel.

To sum up, the present invention provides a control method of a display panel. By selectively providing a first gray level value to a sub-pixel or providing a second gray level value and a third gray level value to a sub-pixel, While solving the problem of color cast, avoid the problem of rhombus or jagged edges.

The above description of the contents of this disclosure and the description of the following embodiments are used to demonstrate and explain the spirit and principle of the present invention, and provide a further explanation of the scope of the patent application of the present invention.

The detailed features and advantages of the present invention are described in detail in the following embodiments. The content is sufficient for any person skilled in the art to understand and implement the technical content of the present invention, and according to the content disclosed in this specification, the scope of patent applications and the drawings. Anyone skilled in the relevant art can easily understand the related objects and advantages of the present invention. The following examples further illustrate the viewpoints of the present invention in detail, but do not limit the scope of the present invention in any way.

Please refer to FIG. 1. FIG. 1 is a schematic flowchart of a control method of a display panel according to an embodiment of the present invention. In step S101, a first data signal is provided, which has a first gray level value. Then in step S103, a second data signal is generated according to the first data signal, wherein the second data signal has a second gray level value and a third gray level value. In step S105, at least a 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-pixels of the display are used to display the correction area, a 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 to display a display screen outside the correction area, a second data signal is output to the sub-pixels.

As described above, the control method shown in FIG. 1 is applicable to a display (not shown) to control a display screen provided by the display. The display system uses a 2D1G pixel structure, that is, a pixel array composed of a plurality of sub-pixel rows and a plurality of sub-pixel rows has each sub-pixel having 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 with different gray levels. Please refer to FIG. 2 together to describe the display screen provided by the display. 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 defined as the background area Z2, for example. However, those with ordinary knowledge in the technical field 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 and only the background area Z2, or the entire display screen IMG can also be defined as the operation area Z1, and not only limited by the drawing. The following description is given by taking FIG. 2 as an example. The operating area Z1 is, for example, an operating interface of an on-screen display (OSD) or a window interface of a Microsoft Windows operating system. The display is, for example, a liquid crystal display (liquid crystal display, LCD), but not limited to this.

Please refer to FIG. 3A for ease of description. 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 image compensator 10 includes 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 The Ma correction module 150 and the processing module 170 are used to receive the first data signal S1. The edge detection module 110 is further used to receive the first correction signal S1 'and the second correction signal S1 ". The processing module 170 further receives a control signal SC. In practice, each of the above modules is integrated into a single integrated circuit (IC) or is implemented as an individual integrated circuit, respectively.

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 grayscale value. The first gamma curve and the second The gamma curve is, for example, a gamma function corresponding to having 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 perform different gamma corrections on the first data signal S1 to generate the first correction signal S1 ′ and the second correction, respectively. Signal S1 ". The first gamma correction module 130 corrects the first grayscale value according to the first gamma curve S1 'to generate a first corrected grayscale value. The second gamma correction module 150 corrects according to the second gamma curve The first grayscale value produces a second corrected grayscale value, 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 grayscale 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 grayscale 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 correction signal S1 ″. The first gray level value, the second gray level value and the third gray level value generated according to the first gray level value are selectively provided to the same sub-pixel, so that the sub-pixels are displayed correspondingly. In more detail, the sub-pixel corresponding to the first gray level value, for example, further defines a main region and a sub-region. When the sub-pixel is driven in a 1D1G manner, the data signal having the first gray level value is The main area and the sub-area are provided at the same time, 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-pixels are driven in 2D1G mode, 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 are respectively based on the second gray-scale value The data signal with the third gray level value is selectively displayed. With the above method, the sub-pixels can be applied to a 1D1G driving method or a 2D1G driving method.

In one embodiment, the edge detection module 110 is used to determine whether the first gray level value in the first data signal S1 corresponds to the sub-pixels located at the edge of the image, or the data of the first gray level value. Whether the signal is used to drive sub-pixels 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 does correspond to a sub-pixel located at the edge of the image, the edge detection module 110 compensates the first gray with a corresponding jagged edge compensation algorithm. The step value or compensates the first corrected grayscale value and the second corrected grayscale value to avoid the problem of jagged edges. The sawtooth edge compensation algorithm is selected by those with ordinary knowledge in the technical field after reading this specification, and can be selected according to actual needs, which is not limited herein.

In more detail, FIG. 3A illustrates 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 as described above. Data 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. The first corrected grayscale value and the second corrected grayscale value are generated as described above, and then the second grayscale value and the third grayscale value are generated.

The processing module 170 selectively supplies the first grayscale value to the sub-pixels according to the instruction of the control signal SC, or provides the second grayscale value and the third grayscale value to the master of the same sub-pixel, respectively. Region and subregion. When the processing module 170 provides the first grayscale value to the sub-pixel, the sub-pixel system is driven according to the 1D1G method. When the processing module 170 provides the second gray level value and the third gray level value to the main region and the sub region of the sub-pixel, respectively, the sub-pixel system is driven according to the 2D1G method.

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

In more detail, the control signal SC is used to indicate multiple coordinate points of the operation area Z1 relative to the display screen, and the processing module 170 defines a range of the operation area Z1 in the display screen IMG according to the coordinate points. In addition, the sub-pixel also has a coordinate point relative to the display screen IMG, and the processing module 170 determines whether the sub-pixel is located in the range of the operation area Z1 according to the multiple coordinate points. In an embodiment, the multiple coordinate points associated with the operation area Z1 are, for example, multiple vertices at the edges of the operation area. In another embodiment, the control signal SC is used, for example, to indicate a starting coordinate point and an area or a shape associated with the coordinate area. 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 region in the display image IMG is larger than a preset value. When the processing module 170 determines that the area size of a monochrome region in the display image IMG is greater than a preset value, the processing module 170 defines the monochrome region as a correction region. In one embodiment, the processing module 170 has a buffer, for example, and the buffer is used to temporarily store the related data of the sub-pixels with the same color for the processing module 170 to determine the Whether the size is greater than a preset value.

Please refer to FIG. 3B again to describe another embodiment of the present invention. 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 includes an output module 290. 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 supplies the first data signal S1 to the output module 290 or the first data signal S1 to the edge detection module 210 and the first gamma according to the instruction of the control signal SC. The correction 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 to The main and sub-regions of a sub-pixel. At this time, the sub-pixel is driven according to the first grayscale value in the first data signal S1. When the control signal SC indicates that the sub pixels are 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 data signal according to the control signal SC. Two gamma correction modules 250. The first gamma correction module 230 and the second gamma correction module 250 generate the first correction signal S1 ′ and the second correction signal S1 ”, respectively, as described above. The edge detection module is based on the first data signal S1, 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 whether the sub-pixel system is located outside or within the correction area. Group 210, a first gamma correction module 230, and a second gamma correction module 250. In an embodiment, depending on 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 caused. Enable (enable) or disable (disable) to save system energy 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. 4B is a schematic diagram of a display screen of a display panel according to an embodiment of the present 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 rhombus and jagged edges. FIG. 4B shows a display screen IMG adjusted using the control method provided by the present invention. The display screen IMG has an experimental area Z3. As shown in FIG. 4B, the phenomenon of rhombus and jagged edges in the experimental area Z3 'is obviously less obvious than the experimental area Z3 in the display image IMG.

To sum up, the present invention provides a control method of a display panel, by selectively providing a first gray level value to a sub-pixel or providing a second gray level value and a third gray level value to a sub-pixel. In an embodiment, the second grayscale value and the third grayscale value are, for example, based on 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 respectively correspond to the main region and the sub-region in the sub-pixel. In one embodiment, when a correction area is defined in the display, the sub pixels in the correction area are provided to the data signal of the first gray level value, and the sub pixels outside the correction area are provided to the second gray level. The data signal of the level value and the third gray level value. In this way, 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 of diamond screen or jagged edges on the display screen.

Although the present invention is disclosed in the foregoing embodiments, it is not intended to limit the present invention. Changes and modifications made without departing from the spirit and scope of the present invention belong to the patent protection scope of the present invention. For the protection scope defined by the present invention, please refer to the attached patent application scope.

10, 20‧‧‧ picture compensator

110, 210‧‧‧Edge Detection Module

130, 230‧‧‧The first gamma correction module

150, 250‧‧‧Second Gamma Correction Module

170, 270‧‧‧Processing Module

290‧‧‧output module

IMG‧‧‧display

S1‧‧‧First data signal

S1’‧‧‧First correction signal

S1 "‧‧‧Second calibration signal

S2‧‧‧Second data signal

SC‧‧‧Control signal

Z1‧‧‧ Operating Area

Z2‧‧‧ background area

Z3, Z3’‧‧‧ experimental area

FIG. 1 is a schematic flowchart of a control method of a display panel according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a compensation 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. FIG. 3B is a functional block diagram of a display frame compensator according to another embodiment of the present invention. 4A is a schematic diagram of a display screen of a display panel according to a comparative embodiment of the present invention. 4B is a schematic diagram of a display screen of a display panel according to an embodiment of the present invention.

Claims (6)

A display control method is applicable to a display. The display is used to provide a display screen. The control method includes: providing a first data signal with a first gray level value; and generating a second data according to the first data signal. Signal, wherein the second data signal has a second gray level value and a third gray level value; defines a portion of the display screen as a correction area; and determines whether a sub-pixel corresponding to the first data signal is used for Display the correction area; when it is judged that the sub pixel is used to display the correction area, output the first data signal to the sub pixel; and when it is judged that the sub pixel is used to display outside the correction area, output the first Two data signals to the sub-pixel. A display control method is applicable to a display for providing a display screen. The control method includes: providing a first data signal having a first gray level value, the first data signal corresponding to a sub-picture Pixels; defining a portion of the display screen as a correction region; determining whether the sub-pixel is used to display the correction region in the display screen; 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 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 gray level value and a The third gray level value, and outputs the second data signal to the sub-pixel. 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 screen as the correction region includes defining a portion of the display screen as the display control signal according to the display control signal. Correct the area. The control method according to claim 3, wherein when the display control signal is received, the step of defining a part of the display screen as the correction area according to the display control signal is obtained according to the display control signal A plurality of coordinates corresponding to the correction area in the display screen, and the correction area is defined according to the coordinates. The control method according to claim 3, further comprising, when determining that an area size of a monochrome region in the display screen is greater than a preset value, defining the monochrome region as the correction region. 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 correspond to a main region and a subregion in the sub-pixel, respectively. .