KR20170003856A - Display device, display panel and timing controller thereof - Google Patents

Abstract

The present embodiment relates to a display device, a display panel and a timing controller thereof. The display device includes: a display panel having two or more pixels each defined in a region in which a data line and a gate line crosses, wherein each pixel in a driving control region on which an object is continuously displayed for a predetermined period of time is driven by a sub-pixel driving process different from a sub-pixel driving process driving each pixel in a general region other than the driving control region; a data driving unit for driving the data line; a gate driving unit for driving the gate line; and a timing controller for controlling the data driving unit and the gate driving unit, analyzing image data of each frame to detect the driving control region, and converting the image data being displayed on the driving control region and the general region in order that each pixel in the driving control region can be driven by a sub-pixel driving process differing from a sub-pixel driving process for driving each pixel in the general region other than the driving controlling region.

Description

DISPLAY DEVICE, DISPLAY PANEL AND TIMING CONTROLLER THEREOF BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a display device for displaying an image.

BACKGROUND ART Demands for a display device for displaying an image have been increasing in various forms as an information society has developed. In addition, a liquid crystal display device (LCD), a plasma display device (Plasma Display Device) OLED (Organic Light Emitting Display Device), and the like.

In such a display device, an after-image phenomenon in which a previous image remains remains after an image displayed on the screen (Image (also referred to as "object" in this specification) disappears due to various causes, Which is a factor for significantly lowering.

Further, when degradation of circuit elements (for example, transistors, organic light emitting diodes, etc.) in the pixels of the display apparatus is advanced, more serious or permanent afterimage phenomena may occur.

The present embodiments are intended to effectively prevent the afterimage phenomenon and improve the image quality.

In order to achieve the above object, according to an embodiment, there is provided a liquid crystal display device including two or more data lines extending in a first direction, two or more gate lines extending in a second direction, and a region where one gate line crosses one data line And each pixel in the drive control area in which an object is continuously displayed for a predetermined time period is divided into a plurality of sub-pixel drive areas, each of which is driven by a sub-pixel drive process different from each pixel in the general area other than the drive control area, .

As another embodiment, there is provided an image processing apparatus including: an area detection unit for detecting a drive control area in which an object is continuously displayed for a predetermined time by analyzing image data of each frame; And a data conversion unit for converting the image data displayed in the drive control area and the general area so as to be driven by another subpixel drive process.

In another embodiment, the display panel, the data driver for driving the data line, the gate driver for driving the gate line, the data driver, and the gate driver are controlled and driven by the sub- And a timing controller for converting the image data displayed in the area.

According to the embodiments, the afterimage phenomenon can be effectively prevented and the image quality can be improved.

1 is a schematic system configuration diagram of a display apparatus 100 according to embodiments.
Figure 2 is a schematic cross-sectional hierarchical view of a subpixel.
3 is a diagram illustrating various examples of the arrangement of subpixels.
4 is a block diagram of a timing controller of a display device according to embodiments.
5 is an exemplary view of an object displayed on the screen.
6 is a diagram for explaining a driving control area (DCA) detection function of the display device according to the embodiments.
Figs. 7A and 7B show a general subpixel driving process in which each pixel in the driving control area and the general area of the display panel are driven equally.
7C show the case where each pixel in the drive control region and the general region in the display panel is driven by the same subpixel drive process.
FIG. 7D shows a problem of a residual image appearing dark due to the deterioration of the B subpixel when a blue pattern is displayed on the display panel when the deteriorated specific subpixel is a B subpixel.
FIG. 8A shows the luminance characteristics of the RWGB subpixel included in each pixel over time.
8B and 8C show that each pixel in the general region is driven by a subpixel drive process in which only the WGB subpixel or the RWB subpixel of the RWGB subpixels is driven and each pixel in the drive control region is driven by the W subpixel Lt; / RTI > driven by a sub-pixel driving process.
FIG. 8D shows that subpixels do not deteriorate in the drive control region when the degraded specific subpixel is a B subpixel and the display panel 110 displays a blue pattern.
FIG. 9A shows luminance characteristics of the RWGB subpixel included in each pixel over time.
9B and 9C show that each pixel in the general region is driven by a subpixel drive process in which only WGB subpixels or RWB subpixels of the RWGB subpixels are driven and each pixel in the drive control region is driven by the RGB subpixel Lt; / RTI > driven by a sub-pixel driving process.
FIG. 9D shows that the white sub-pixel is not deteriorated in the drive control area when the degraded specific sub-pixel is a W sub-pixel and a white pattern is displayed on the display panel 110. FIG.
10A and 10B show that each pixel in the general region is driven by a subpixel drive process in which only the WGB subpixel or the RWB subpixel in the RWGB subpixel is driven and each pixel in the drive control region is driven by the RWGB subpixel All driven by a sub-pixel driving process.
11A to 11B show that each pixel in the drive control area is driven by only one W subpixel out of the RWGB subpixel until a specific time or a specific number of times, And driven by a driven sub-pixel driving process.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

1 is a schematic system configuration diagram of a display apparatus 100 according to embodiments. Figure 2 is a schematic cross-sectional hierarchical view of subpixels, and Figure 3 is an illustration of various placement of subpixels.

1, a display device 100 according to an embodiment includes m data lines DL1, ..., DLm, m (natural numbers) extending in a first direction and n data lines A data driver 120 for driving the m data lines DL1 to DLm, and a data driver 120 for driving the n data lines DL1 to DLm. The display panel 110 includes gate lines GL1, ..., GLn, A gate driver 130 for sequentially driving the lines GL1 to GLn and a timing controller 140 for controlling the data driver 120 and the gate driver 130,

Pixels P are formed at the points where the m data lines DL1 through to DLm and the n gate lines GL1 through to GLn intersect with each other do.

The display panel 110 includes a red subpixel SPr, a white subpixel SPw, a green subpixel SPg and a blue subpixel SPb (hereinafter referred to as " RWGB < / RTI > subpixel). That is, each pixel P may include RWGB subpixels (SPr, SPw, SPg, SPb). These pixels P are formed in a number corresponding to the resolution of the display panel 110.

2, the RWGB sub-pixels SPr, SPw, SPg, and SPb include organic light emitting diodes that emit red, green, blue, and white light, white organic light emitting diodes WOLED, and RGB color filters CFr, CFg , CFb) may be used. The method of using the latter white organic light emitting diode (WOLED) and RGB color filters (CFr, CFg, CFb) is as follows.

3, the RWGB sub-pixels SPr, SPw, SPg and SPb include a transistor TFT, RGB color filters CFr, CFg and CFb and a white organic light emitting diode WOLED. On the other hand, the white subpixel SPw includes a transistor portion TFT and a white organic light emitting diode WOLED. The RGB subpixels SPr, SPg and SPb convert the white light emitted from the white organic light emitting diode WOLED to red, green and blue, and therefore include the RGB color filters CFr, CFg and CFb. Alternatively, the white subpixel SPw emits the white light emitted from the white organic light emitting diode WOLED as it is, and thus a W color filter having a high transmittance is used although the color filter is not included.

The method using the RWGB subpixels (SPr, SPw, SPg, SPb) deposits a white luminescent material on all the subpixels unlike the method in which red, green, and blue luminescent materials are independently deposited on each subpixel. Therefore, this method is easy to enlarge even if the mask is not used. In addition, since the transmittance of the color filter is low, the W subpixel has higher efficiency than the RGB subpixel, so that the power consumption can be reduced along with the service life of the W subpixel.

The display panel 110 can arrange the subpixels in various ways to improve the color purity and the expression power as well as to match the target color coordinates. For example, the display panel 110 may have a structure in which RGBW subpixels (SPr, SPg, SPb, SPw) are arranged in the order of RGBW as shown in FIG. 3A. In addition, the display panel 110 may have a structure in which WRGB subpixels (SPw, SPr, SPg, SPb) are arranged in the order as shown in FIG. 3B. In addition, the display panel 110 may have a structure in which WGBR subpixels (SPw, SPg, SPb, SPr) are arranged in the order of WGBR as shown in FIG. 3C. Also, the display panel 110 may have a structure in which RWGB subpixels (SPr, SPw, SPg, SPb) are arranged in the order of FIG. 3D. Also, the display panel 110 may have a structure in which BGWR subpixels (SPb, SPg, SPw, SPr) are arranged in the order as shown in FIG. 3E. The display panel 110 may have a sub-pixel structure arranged in various orders in addition to the examples shown and described above.

Hereinafter, the display panel 110 will be described as being arranged in the order of RWGB subpixels (SPr, SPw, SPg, SPb) as shown in FIG. 3D, but may have a subpixel structure arranged in various orders .

The display device 100 described above uses the RW sub-pixels SPr, SPw, SPg, and SPb to display the desired color coordinates on the display panel 110, as well as the W sub-pixels SPw and the RGB sub- , SPb) to compensate for light emission.

Each pixel formed on the display panel 110 includes circuit elements such as a transistor and a capacitor. For example, when the display panel 110 is an organic light emitting display panel, circuit elements such as organic light emitting diodes, two or more transistors, and one or more capacitors are formed in each pixel.

The circuit element formed in each pixel may undergo degradation due to various factors, and thus the afterimage phenomenon to be prevented in the present embodiments can be further intensified.

The timing controller 140 starts scanning in accordance with the timing implemented in each frame, switches the image data input from the interface to the data signal format used by the data driver 120, and outputs the converted image data Data ), And controls the data driving at a proper time according to the scan. When each pixel P includes RWGB subpixels SPr, SPw, SPg and SPb, the timing controller 140 converts the RGB image data into RWGB image data using an internal algorithm.

The timing controller 140 controls various control signals such as a data control signal (DCS) and a gate control signal (GCS) to control the data driver 120 and the gate driver 130 Can be output.

The above-described gate driver 130 sequentially applies a scan signal of an On voltage or an Off voltage to n gate lines GL1, ..., and GLn in accordance with the control of the timing controller 140 And sequentially drives the n gate lines GL1, ..., and GLn.

The data driver 120 stores the input image data Data in a memory (not shown) under the control of the timing controller 140, and when the specific gate line is opened, Type data voltage Vdata and supplies the m data lines DL1 to DLm to the m data lines DL1 to DLm.

On the other hand, the display device 100 according to the embodiments limits the driving of a specific sub-pixel, which is vulnerable to afterimage, to a residual image (hereinafter referred to as " image ") on an image that can be generated as an image is displayed at a fixed position for a long time Can be prevented.

In order to restrict the driving of a specific subpixel vulnerable to the afterimage, when the object is continuously displayed at a fixed position for a certain period of time (for example, several frame periods) Each pixel can be driven by a different subpixel drive process than each pixel in the general area other than the drive control area.

The above-mentioned "Image" is referred to as an " Object "

The "subpixel driving process" means a method of selecting and driving subpixels that can prevent a residual image of an object displayed at a fixed position for a long time. This "prevention of afterimage" also means to remove the afterimage, and in some cases, even if there is an afterimage, it also means that it is not visible to the naked eye.

The above-described image retention prevention function can be provided by, for example, the timing controller 140. [

The timing controller 140 analyzes the image data of each frame, detects a driving control area (DCA) in which an object is continuously displayed for a predetermined time, The image data Data displayed in the drive control area and the general area can be converted so that each pixel in the drive control area is driven by a subpixel drive process different from each pixel in the general area other than the drive control area.

The data driver 120 receives the image data Data converted to be driven by the sub pixel driving process described above from the timing controller 140 and converts the data voltages to data lines corresponding to the driving control area and the general area Can be output.

The "area" in these embodiments may be referred to as a block, and may include one pixel area or two or more pixel areas. The "drive control area" means an area in which a residual image can occur, means an area in which the same object is displayed at a fixed position for a long time, or, in some cases, You may.

According to the above-described afterimage-preventing function, the same object is constantly displayed at a fixed position for a predetermined time, and the afterimage of the object can be prevented even after the object disappears. This can significantly improve image quality.

In addition, for each of the areas detected as the "drive control area" corresponding to the area where the afterimage can occur, it is possible to prevent the afterimage individually by limiting the driving of the specific subpixel vulnerable to the afterimage. This makes it possible to improve image quality considerably effectively.

The display device 100 shown in FIG. 1 may include, for example, a liquid crystal display device (LCD), a plasma display device, an organic light emitting display device (OLED) ) Or the like.

Hereinafter, the afterimage-preventing function briefly described above will be described in more detail.

4 is a block diagram of the timing controller 140 of the display device 100 according to the embodiments.

Referring to FIG. 4, the timing controller 140 of the display device 100 according to the embodiments includes an area detecting unit 210, a data converting unit 220, and the like.

The area detecting unit 210 analyzes the image data of each frame and detects a drive control area in which the object is continuously displayed for a predetermined time.

The data conversion unit 220 converts the image data displayed in the drive control area and the general area so that each pixel in the drive control area is driven by a subpixel drive process different from each pixel in the general area other than the drive control area , And outputs the converted image data.

By limiting the driving of the specific subpixel vulnerable to the afterimage of the timing controller 140, the same object is constantly displayed at a fixed position for a certain period of time, and even after the object disappears, It is possible to prevent the afterimage that may appear. This can significantly improve image quality.

In particular, even when the residual image generation degree of each area detected as the "drive control area" corresponding to the area where the afterimage occurs is different, it is possible to individually perform the afterimage prevention process on each of the areas detected as the drive control area. This makes it possible to improve image quality considerably effectively.

The drive control area detection function and the data conversion function performed by the area detection unit 210 and the data conversion unit 220 included in the timing controller 140 will be described in more detail below with reference to the drawings .

First, the drive control area detecting function of the area detecting section 210 will be described with reference to Figs. 5 and 6. Fig. 5 is an exemplary view of an object displayed on the screen. 6 is a diagram for explaining a driving control area (DCA) detection function of the display device according to the embodiments.

The area detecting unit 210 analyzes the image data of each frame inputted from the external interface and detects a driving control area in which the object is continuously displayed for a predetermined time.

5, the area detected by the area detecting unit 210 as the driving control area DCA is the object 310 itself continuously displayed at a fixed position on the screen 300 for a predetermined period of time , And at least one pixel region for continuously exposing the same object 310 at a fixed location for a period of time.

Objects 310 with the words "TALK SHOW" and "CH 11" are displayed at the upper right and upper left of the screen 300. Here, "TALK SHOW " and" CH 11 "may be objects, and depending on the interpretation, " T "," A ", "L "," K ", & Each "1" can also be viewed as an object.

In the enlarged view of the portion where "1" is displayed in the phrase "CH 11 ", several regions which are displayed brighter than the surroundings are detected as the drive control region LCA in order to express" 1 ".

It is possible to prevent the afterimage caused by the object exposed at the fixed position for a long time, thereby making it possible to improve the deterioration of the image quality which can be damaged by the afterimage.

As used herein, the term "object (object)" is an image for at least one of, for example, a logo, date information, time information, weather information, channel information, And is not limited to these examples, and may be any object that can be changed at every frame and displayed at a fixed position to generate a residual image.

It is possible to prevent the afterimage due to logo, date information, time information, weather information, channel information, content related information, broadcast program related information, and subtitles displayed at a fixed position for a long time, have.

According to the example of the object described above, the object may be displayed at an arbitrary position on the entire screen, but it may be a limited position (e.g., a border area, a corner area, or the like) that does not significantly disturb the viewing of the main image displayed on the screen, . ≪ / RTI >

Therefore, the area detecting unit 210 may detect the drive control area by analyzing the partial image data corresponding to the partial area of a certain percentage of the entire screen area of the entire screen, taking into account the displayable position of the object.

Thus, by limiting the range of image data analysis required for detecting the drive control area to a limited range, it is possible to greatly reduce the amount of analysis and analysis time required for image data analysis, and high-speed detection of the drive control area becomes possible.

Such a high-speed detection of the drive control region can make it possible to appropriately limit the driving of a specific sub-pixel which is susceptible to after-image with respect to a drive control region in which a residual image is likely to occur.

Therefore, it is possible to prevent the afterimage that may occur due to the delay in detection of the drive control area.

6, the partial area corresponding to the limited image data analysis range for the area detection unit 210 to detect the drive control area may be a full screen 300, for example, (EA: Edge Area) or at least one corner area (CA: Corner Area, CA1, CA2, CA3, CA4). Here, the border area EA and the corner area CA are areas where image data analysis is performed.

In this manner, by performing image data analysis only in a border area or in a limited range of at least one corner area in order to detect the drive control area, The analysis time can be reduced more effectively.

The data driver 120 converts the converted video data Data input from the timing controller 140 into analog data voltages Vdata under the control of the timing controller 140 to generate m data lines (DL1, ..., DLm) to drive the m data lines DL1, ..., DLm.

The display panel 110 can drive each pixel in the driving control area in which the object is continuously displayed for a predetermined time by a sub-pixel driving process different from each pixel in the general area other than the driving control area.

Next, each pixel in the drive control area in which the object is continuously displayed for a predetermined time according to the data conversion of the data converter 220 is driven by a sub-pixel drive process different from each pixel in the general area other than the drive control area The display panel will be described with reference to Figs. 7A to 11C.

Figs. 7A and 7B show a general subpixel driving process in which each pixel in the driving control area and the general area of the display panel are driven equally.

7A and 7B, in the display panel 110, each pixel in the drive control region and the general region can be driven by the same subpixel drive process. When displaying the white-based image data on the display panel 110, at least one other sub-pixel may be further driven while driving the W sub-pixels in order to adjust the color temperature of the white series.

For example, when white image data is displayed on the display panel 110, as shown in FIG. 7A, a WGB subpixel is driven to match the color temperature of the white system, or an RWG subpixel Can be driven. It is also possible to drive the RWB subpixel (not shown) when the video data of the white series is displayed on the display panel 110.

7C, when each pixel in the driving control area and the general area of the display panel 110 is driven by the same subpixel driving process as shown in FIGS. 7A and 7B, a certain time (for example, several frames In the driving control area in which the object is continuously displayed at a fixed position during a predetermined period of time, a dark image may appear due to deterioration of a specific subpixel when displaying white-based image data on the display panel 110. [ As shown in FIG. 7D, if the degraded specific subpixel is a B subpixel, if a blue pattern (127 blue pattern) is displayed on the display panel 110, a problem of afterimages appearing dark due to deterioration of the B subpixel can be confirmed. Subpixels deteriorated for various reasons such as materials and structures of organic light emitting diodes and driving transistors constituting subpixels may be different for each display panel 110.

After the area corresponding to the drive control area is detected by the area detection unit 210, the data conversion unit 220 determines whether or not each pixel in the drive control area is driven by a sub- Converts the image data displayed in the drive control area and the general area so as to be driven by the process, and outputs the converted image data. Accordingly, each pixel in the drive control region in which the object is continuously displayed for a predetermined period of time is driven by the sub-pixel drive process different from each pixel in the general region other than the drive control region.

Hereinafter, in order to prevent the afterimage of a specific subpixel vulnerable to afterimage in the drive control area, each pixel in the drive control area is driven by a subpixel drive process different from each pixel in the general area other than the drive control area . In this case, when white image data is displayed on the display panel 110, as shown in FIG. 7A, driving the WGB subpixels in order to adjust the color temperature of the white series will be exemplarily described. Pixel driving process in which at least one sub-pixel is driven together with the W sub-pixel.

FIG. 8A shows the luminance characteristics of the RWGB subpixel included in each pixel over time.

As shown in FIG. 8A, in the RWGB subpixel included in each pixel, the luminance characteristic of the W subpixel is the best and the luminance characteristic of the RGB subpixel may be degraded.

In the case of driving the WGB subpixels in order to adjust the color temperature of the white series when displaying the white-based image data on the display panel 110, each pixel in the general area is driven by the WGB sub- Pixel or the RWB sub-pixel is driven, and each pixel in the drive control region is driven by a sub-pixel drive process in which only W sub-pixels among the RWGB sub-pixels are driven.

The data conversion unit 220 may convert the image data of each pixel in the general area into WGB or RWB image data and convert the image data of each pixel in the drive control area into W image data.

8C, when displaying a normal moving image on the display panel 110, when white image data is displayed on the display panel 110, each pixel in the general area is set to the RWGB sub- Pixel driving process in which only the WGB subpixel or the RWB subpixel among the pixels is driven. On the other hand, each pixel in the drive control area in which an object is continuously displayed for a predetermined time can be driven by a sub-pixel driving process in which only W sub-pixels among RWGB sub-pixels are driven.

8A, when the luminance characteristic of the W subpixel is the best in the RWGB subpixel included in each pixel and the luminance characteristic of the RGB subpixel is inferior, each pixel in the driving control region has only W subpixels among the RWGB subpixels Pixel driving process, it is possible to prevent the afterimage due to deterioration of the RGB sub-pixels.

For example, as shown in FIG. 8D, when the degraded specific sub-pixel is a B sub-pixel, a blue pattern (127 blue pattern) is displayed on the display panel 110 to prevent a sub- can do.

FIG. 9A shows luminance characteristics of the RWGB subpixel included in each pixel over time.

As shown in FIG. 9A, in the RWGB subpixel included in each pixel, the luminance characteristic of the W subpixel is the lowest and the luminance characteristic of the RGB subpixel is relatively good.

In the case of driving the WGB subpixels in order to match the color temperature of the white series when displaying the white series of video data on the display panel 110, each pixel in the general area is driven by the WGB sub- Pixel or a RWB sub-pixel is driven, and each pixel in the drive control region is driven by a sub-pixel driving process in which only RGB sub-pixels among the RWGB sub-pixels are driven.

The data converter 220 converts the image data of each pixel in the general area into WGB or RWB image data and converts the image data of each pixel in the drive control area into RGB image data.

9C, when a general moving image is displayed on the display panel 110, when white image data is displayed on the display panel 110, each pixel in the general area is set to the RWGB sub- Pixel driving process in which only the WGB subpixel or the RWB subpixel among the pixels is driven. On the other hand, each pixel in the drive control region in which an object is continuously displayed for a predetermined time can be driven by a sub-pixel driving process in which only RGB sub-pixels among RWGB sub-pixels are driven.

9A, when the luminance characteristic of the W subpixel in the RWGB subpixel included in each pixel is the lowest, each pixel in the driving control region is driven by a subpixel driving process in which only the RGB subpixel among the RWGB subpixels is driven It is possible to prevent the afterimage due to deterioration of the W subpixel.

For example, as shown in FIG. 9D, when a specific sub-pixel deteriorated is a W sub-pixel, a white pattern is displayed on the display panel 110 to prevent a W sub-pixel from deteriorating in the driving control area can do.

When white-based image data is displayed on the display panel 110 to drive the WGB subpixels in order to match the color temperature of the white series, each pixel in the general area, as shown in FIG. 10A, Pixel or a RWB subpixel is driven, and each pixel in the drive control region is driven by a subpixel drive process in which all of the RWGB subpixels of the RWGB subpixels are driven.

The data conversion unit 220 may convert image data of each pixel in the general area into WGB or RWB image data and convert the image data of each pixel in the drive control area into RWGB image data.

10B, when a general moving image is displayed on the display panel 110, white pixels are displayed on the display panel 110 in order to adjust the color temperature of the white series, Pixel driving process in which only the WGB subpixel or the RWB subpixel among the pixels is driven. On the other hand, each pixel in the drive control region in which an object is continuously displayed for a predetermined time can be driven by a sub-pixel driving process in which all the RWGB sub-pixels are driven.

9A, when the luminance characteristic of the W subpixel in the RWGB subpixel included in each pixel is the lowest, each pixel in the driving control region is driven by a subpixel driving process in which only the RGB subpixel among the RWGB subpixels is driven It is possible to prevent the afterimage due to deterioration of the W subpixel.

Each pixel in the general region is driven by a sub-pixel driving process in which only the WGB sub-pixel or the RWB sub-pixel among the RWGB sub-pixels is driven, and each pixel in the driving control region is driven by the W sub Pixel driving process in which one of the pixel, the RWGB subpixel, and the RGB subpixel is selectively driven.

The subpixel driving processor is selected in consideration of the frequency of use of the subpixels, so that the subpixels deteriorated according to the characteristics of the image data can be selected to effectively prevent the afterimage due to deterioration of the specific subpixels.

The data conversion unit 220 converts the image data of each pixel in the general area into WGB or RWB image data, and converts the image data of each pixel in the drive control area into W sub-pixel, RWGB Subpixel, and RGB subpixel.

Each pixel in the general area can be driven by a sub-pixel driving process in which only the WGB sub-pixel or the RWB sub-pixel of the RWGB sub-pixel is driven. As shown in FIG. 11A, each pixel in the drive control region is driven by one of the W subpixel, the RWGB subpixel, and the RGB subpixel of the RWGB subpixel for a specific time or a specific number of times, A sub-pixel driving process driven by one of the W sub-pixel, the RWGB sub-pixel and the RGB sub-pixel among the pixels.

Each pixel in the drive control area is driven by one of the RWGB subpixel and the RGB subpixel of the RWGB subpixel from a specific time or a specified number of times, Lt; / RTI >

The data conversion unit 220 converts the image data of each pixel in the general area into WGB or RWB image data, converts the image data of each pixel in the drive control area to W image data up to a specific time or a specific number of times, It is possible to convert it into one of the RWGB image data and the RGB image data from the time or after the specific number of times.

As shown in FIG. 11B, each pixel in the drive control region is driven by only one W subpixel of the RWGB subpixel until a specific time or a specific number of times, and is driven to the RWGB subpixel of the RWGB subpixel And may be driven by a pixel driving process.

As shown in FIG. 11C, each pixel in the drive control region is driven by only the W subpixel of the RWGB subpixel until a specified time or a specific number of times, and is driven to the RGB subpixel of the RWGB subpixel And may be driven by a pixel driving process.

A subpixel having an excellent luminance characteristic is first used and a subpixel having a lower luminance characteristic is used thereafter, so that the problem of afterimage due to deterioration can be minimized.

According to the embodiments, the afterimage phenomenon can be effectively prevented and the image quality can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: display device
110: Display panel
120: Data driver
130: Gate driver
140: Timing controller

Claims (17)

At least two data lines extending in a first direction;
At least two gate lines extending in a second direction; And
A plurality of pixels, each of which is defined in a region where one data line and one gate line cross each other,
Wherein each pixel in a drive control region in which an object is continuously displayed for a predetermined period of time is driven by a subpixel drive process different from each pixel in a general region other than the drive control region. The method according to claim 1,
The object may include:
A display panel which is displayed on a screen and is an image for at least one of a logo, date information, time information, weather information, channel information, content related information, broadcast program related information, and subtitles. The method according to claim 1,
Each pixel includes an RWGB subpixel,
When the image data to be displayed is a white series, each pixel in the general area is driven by a sub-pixel driving process in which at least one sub-pixel is driven together with W sub-pixels among RWGB sub-pixels,
Wherein each pixel in the drive control region is driven by a subpixel drive process in which only W subpixels of the RWGB subpixels, all of the RWGB subpixels, and only RGB subpixels are driven. The method of claim 3,
Each pixel in the general area is driven by a subpixel drive process in which only the WGB or RWB subpixel of the RWGB subpixels is driven,
Wherein each pixel in the drive control region is driven by a sub-pixel drive process in which only W sub-pixels among the RWGB sub-pixels are driven. The method of claim 3,
Each pixel includes an RWGB subpixel,
Each pixel in the general area is driven by a sub-pixel drive process in which only the WGB or RWB sub-pixel of the RWGB sub-pixel is driven,
Wherein each pixel in the drive control region is driven by a sub-pixel drive process in which all RWGB sub-pixels among the RWGB sub-pixels are driven. The method of claim 3,
Each pixel includes an RWGB subpixel,
Each pixel in the general area is driven by a sub-pixel drive process in which only the WGB or RWB sub-pixel of the RWGB sub-pixel is driven,
Wherein each pixel in the drive control region is driven by a sub-pixel drive process in which only RGB sub-pixels among RWGB sub-pixels are driven. The method of claim 3,
Each pixel includes an RWGB subpixel,
Each pixel in the general area is driven by a sub-pixel drive process in which only the WGB or RWB sub-pixel of the RWGB sub-pixel is driven,
Wherein each pixel in the drive control region is driven by a sub-pixel drive process in which one of the W subpixel, the RWGB subpixel, and the RGB subpixel of the RWGB subpixels is selectively driven according to the frequency of use. The method of claim 3,
Each pixel includes an RWGB subpixel,
Each pixel in the general area is driven by a sub-pixel drive process in which only the WGB or RWB sub-pixel of the RWGB sub-pixel is driven,
Wherein each pixel in the drive control region is driven by one of the W subpixel, the RWGB subpixel, and the RGB subpixel of the RWGB subpixel to a specific time or a specific number of times, and after the specific time or the specific number of times, , The RWGB subpixel, and the RGB subpixel. 9. The method of claim 8,
Each pixel includes an RWGB subpixel,
Each of the pixels in the drive control region is driven by only one of the RW sub-pixels and the RGB sub-pixels of the RWGB sub-pixel from the specific time or the specific number of times, A display panel driven by a pixel driving process. An area detector for analyzing image data of each frame and detecting a driving control area in which an object is continuously displayed for a predetermined time; And
And a data conversion unit for converting the image data displayed in the drive control area and the general area so that each pixel in the drive control area is driven by a subpixel drive process different from each pixel in the general area other than the drive control area Timing controller. 11. The method of claim 10,
Each pixel includes an RWGB subpixel,
If the displayed image data is a white series, the data conversion unit converts the image data of each pixel in the general area into W of at least one RWGB and at least one other color image data, Into one of W image data, RGB image data, or RWGB image data. 12. The method of claim 11,
Wherein the data conversion unit converts the image data of each pixel in the general area into WGB or RWB image data and converts the image data of each pixel in the drive control area into one of W image data, RGB image data, or RWGB image data Timing controller. 12. The method of claim 11,
The data conversion unit converts the image data of each pixel in the general area into WGB or RWB image data, and converts the image data of each pixel in the drive control area into one of W image data, RGB image data, or RWGB image data ≪ / RTI > 12. The method of claim 11,
The data conversion unit converts the image data of each pixel in the general area into WGB or RWB image data, and converts the image data of each pixel in the drive control area into W image data, RGB image data, RWGB image data, and converts the image data into one of W image data, RGB image data, or RWGB image data after the specific time or the specific number of times. 15. The method of claim 14,
The data conversion unit converts the image data of each pixel in the drive control area into W image data up to a specific time or a specific number of times and converts the image data into one of RWGB image data and RGB image data from the specific time or the specific number of times . Wherein each pixel in the drive control region includes two or more pixels each of which is defined in an area where the data line and the gate line cross each other, A display panel driven by a sub pixel driving process;
A data driver driving the data lines;
A gate driver for driving the gate line; And
Wherein the control unit controls the data driver and the gate driver to analyze the image data of each frame to detect the drive control area and to cause each pixel in the drive control area to serve as a sub- And a timing controller for converting image data displayed in the drive control area and the general area so as to be driven by a pixel drive process. 17. The method of claim 16,
And the displayed image data is a white series.

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