KR102623354B1 - Multi-vision device and display device included in multi-vision device - Google Patents

Abstract

The present invention relates to a multi-vision device and a display device included in the multi-vision device. A multi-vision device according to an embodiment of the present invention is composed of a plurality of unit display devices to display a single image, wherein the unit display device includes a display panel including a plurality of pixels and a plurality of gate lines disposed on the display panel. a gate driver that supplies a gate signal to the display panel, a data driver that supplies data signals to a plurality of data lines disposed on the display panel, and a timing controller that controls the gate driver and the data driver, wherein the timing controller is an external device. Based on the arrangement direction signal input from the gate driver, at least one of the driving direction of the data driver, the pixel-by-pixel supply order of the image data supplied to the data driver, and the type of compensation data applied to the image data. Decide.

Description

Multi-vision device and display device included in the multi-vision device {MULTI-VISION DEVICE AND DISPLAY DEVICE INCLUDED IN MULTI-VISION DEVICE}

The present invention relates to a multi-vision device and a display device included in the multi-vision device.

As the information society develops, the demand for display devices for displaying images is increasing in various forms, and in recent years, liquid crystal displays (LCDs), plasma display panels (PDPs), and organic light emitting devices have been developed. Various display devices such as diode displays (OLED: Organic Light Emitting Diode) are being utilized.

A liquid crystal display device is a device that displays information using the property of changing the arrangement of molecules when a voltage is applied, among the various properties of liquid crystal. A liquid crystal display device includes two thin glass substrates and liquid crystals contained in a narrow gap between the glass substrates, and displays information by applying a voltage to change the arrangement direction of the liquid crystal molecules to pass or reflect light. Liquid crystal displays can be made of thinner plates than other display devices and consume less power, so they are widely used in portable computers.

A plasma display device constructs a screen by arranging gas tubes between two glass plates. Neon or argon is injected into the gas tube, and voltage is applied to the electrode connected to the tube to induce a plasma phenomenon. The resulting ultraviolet rays pass through the fluorescent layer corresponding to the three primary colors and are converted into visible light to display a color screen.

The organic light emitting diode display device is a display device using OLED, a self-luminous element that emits light in an organic light emitting layer by recombination of electrons and holes. It is attracting attention as a next-generation display device due to its high brightness, low driving voltage, and ability to be made ultra-thin.

Recently, in accordance with the trend of preferring larger screens, display devices are being manufactured with wider display areas. Particularly in places where many people gather, such as stadiums, performance halls, and hospitals, the demand for large display devices to allow many people to view information at the same time is increasing. However, there is a limit to expanding the area of a single display device due to a rapid increase in manufacturing costs accompanying the production of a display device with a large area or a decrease in image quality due to signal delay.

In response to these problems, multi-vision systems that combine multiple display devices in a matrix form are being put into practical use. For example, a multi-vision system combining multiple large-area display devices is used for advertising displays installed on the rooftops of buildings or large displays installed in performance halls.

When driving the unit display devices that make up such a multi-vision system, it is necessary to consider the arrangement direction of each unit display device.

The purpose of the present invention is to provide a multi-vision system that can optimally drive unit display devices according to the direction in which each unit display device is arranged when displaying a single image using a multi-vision system.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

A multi-vision device according to an embodiment of the present invention is composed of a plurality of unit display devices to display a single image, wherein the unit display device includes a display panel including a plurality of pixels and a plurality of gate lines disposed on the display panel. a gate driver that supplies a gate signal to the display panel, a data driver that supplies data signals to a plurality of data lines disposed on the display panel, and a timing controller that controls the gate driver and the data driver, wherein the timing controller is an external device. Based on the arrangement direction signal input from the gate driver, at least one of the driving direction of the data driver, the pixel-by-pixel supply order of the image data supplied to the data driver, and the type of compensation data applied to the image data. Decide.

In one embodiment of the present invention, the timing control unit determines the driving direction of the gate driver to be forward or reverse based on the arrangement direction signal.

Additionally, in one embodiment of the present invention, the timing control unit determines the driving direction of the data driver to be forward or reverse based on the arrangement direction signal.

In addition, in one embodiment of the present invention, the timing control unit maintains the supply order of the image data for each pixel or changes it to the reverse order based on the arrangement direction signal.

Additionally, in one embodiment of the present invention, the timing control unit obtains compensation data corresponding to the arrangement direction signal from the storage unit.

Additionally, in one embodiment of the present invention, the timing control unit generates the compensation data by converting basic compensation data obtained from the storage unit according to the arrangement direction signal.

Additionally, a display device according to an embodiment of the present invention includes a display panel including a plurality of pixels, a gate driver that supplies gate signals to a plurality of gate lines arranged on the display panel, and a plurality of data arranged on the display panel. It includes a data driver for supplying a data signal to a line, the gate driver, and a timing controller for controlling the data driver, wherein the timing controller determines the driving direction of the gate driver and the data based on an arrangement direction signal input from an external device. At least one of the driving direction of the driver, the pixel-by-pixel supply order of the image data supplied to the data driver, and the type of compensation data applied to the image data is determined.

According to the present invention, when displaying a single image using a multi-vision system, there is an advantage in that the unit display devices can be optimally driven according to the direction in which each unit display device is arranged.

Figure 1 briefly shows the configuration of a multi-vision system according to an embodiment of the present invention.
Figure 2 is a configuration diagram of a display device constituting a multi-vision system according to an embodiment of the present invention.
Figure 3 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the first direction.
Figure 4 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the second direction.
Figure 5 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the third direction.
Figure 6 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the fourth direction.

The above-mentioned objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, identical reference numerals are used to indicate identical or similar components.

Figure 1 briefly shows the configuration of a multi-vision system according to an embodiment of the present invention.

Referring to the drawings, the multi-vision system according to an embodiment of the present invention is composed of a plurality of unit display devices DP1 to DP4 and displays images input from the external device 100. A plurality of unit display devices DP1 to DP4 are arranged in an n×m matrix or array. Although FIG. 1 shows an example in which four display devices are arranged in a 2×2 array, the number and arrangement of unit display devices constituting the multi-vision system may vary depending on the embodiment.

The image input from the external device 100 may be a single image or may be multiple images corresponding to each unit display device DP1 to DP4. Figure 1 shows an example in which a single image is displayed through four unit display devices DP1 to DP4. Hereinafter, the case where the image input from the external device 100 is a single image will be described as an example.

The external device 100 outputs an image to be displayed through a multi-vision system according to an embodiment of the present invention. Examples of the external device 100 include, but are not limited to, a computer equipped with a graphics card. The external device 100 may be connected to the multi-vision system wired through a cable, or may be connected to the multi-vision system through wireless communication such as Bluetooth or Wi-Fi.

The external device 100 transmits each image signal (RGB1 to RGB4) to be displayed through each unit display device (DP1 to DP4) constituting the multi-vision system to each unit display device (DP1 to DP4). Additionally, the external device 100 transmits arrangement direction signals AD1 to AD4, which are information indicating the direction in which each unit display device DP1 to DP4 are arranged, to each unit display device DP1 to DP4.

The user can input the direction in which each unit display device DP1 to DP4 is placed into the external device 100 through software or hardware installed on the external device 100. The arrangement directions of each unit display device DP1 to DP4 input in this way are stored in the external device 100 as arrangement direction signals AD1 to AD4 of each unit display device DP1 to DP4.

Each unit display device (DP1 to DP4) displays image signals (RGB1 to RGB4) with reference to the arrangement direction signals (AD1 to AD4) output from the external device 100. Refer to FIGS. 2 to 6 for the meaning of the ‘arrangement direction’ of each unit display device (DP1 to DP4) and how each unit display device (DP1 to DP4) displays an image with reference to the arrangement direction signals (AD1 to AD4). This is explained in more detail.

Figure 2 is a configuration diagram of a display device constituting a multi-vision system according to an embodiment of the present invention. For reference, the display device shown in FIG. 2 represents one of the unit display devices DP1 to DP4 shown in FIG. 1 .

Referring to the drawings, a display device 1 according to an embodiment of the present invention includes a display panel 18. The display panel 18 includes a plurality of data lines (DL1 to DLn) and a plurality of gate lines (GL1 to GLn). A plurality of data lines (DL1 to DLn) and a plurality of gate lines (GL1 to GLn) intersect each other to define a pixel area. A pixel (P) is placed in each pixel area.

Each pixel (P) includes a thin film transistor (TFT). A data voltage is supplied from the data driver 16 through the TFT provided in each pixel P. When the display device 1 is a liquid crystal display device, the pixel P may include a liquid crystal capacitor whose arrangement of liquid crystal molecules varies depending on the supplied data voltage. When the display device 1 is an organic light emitting diode display device, the pixel P may include an organic light emitting diode that emits light by itself by supplying a data voltage.

The data driver 16 receives the data direction signal DDS and image data Vdata from the timing control unit 12. The data driver 16 converts the image data Vdata received from the timing controller 12 into an analog data voltage and supplies it to the plurality of data lines DL1 to DLn.

At this time, the driving direction of the data driver 16, that is, the direction or order of supplying the data voltage through the data lines DL1 to DLn, is determined based on the data direction signal DDS supplied from the timing controller 12. When the data direction signal DDS is a signal indicating the forward direction (eg, a low level signal), the data driver 16 sequentially supplies the data voltage in the direction from the data line DL1 to the data line DLn. Conversely, when the data direction signal DDS is a signal indicating the reverse direction (eg, a high level signal), the data driver 16 sequentially supplies the data voltage in the direction from the data line DLn to the data line DL1.

The data driver 16 may include at least one source driver integrated circuit. Each source driver integrated circuit is connected to a bonding pad of the display panel 18 using a tape automated bonding (TAB) method or a chip on glass (COG) method. It may be placed directly in (18) or may be integrated and placed in the display panel (18).

Additionally, each source driver integrated circuit may be implemented using a chip on film (COF) method. In this case, one end of the film on which each source driver integrated circuit is mounted is bonded to at least one source printed circuit board (Source Printed Circuit Board), and the other end is bonded to the display panel 18.

The gate driver 14 generates a scan signal based on the forward gate start pulse (GSPF), reverse gate start pulse (GSPR), and gate direction signal (GDS) supplied from the timing controller 12, and generates the generated scan signal. It is sequentially supplied to multiple gate lines (GL1 to GLn).

At this time, the driving direction of the gate driver 14, that is, the direction or order of supplying the scan signal through the gate lines GL1 to GLn, is determined based on the gate direction signal GDS supplied from the timing controller 12. When the gate direction signal (GDS) is a signal indicating the forward direction (e.g., a high level signal), the gate driver 14 receives the forward gate start pulse (GSPF) from the timing control unit 12 and moves from the gate line GL1 to the gate line. Scan signals are supplied sequentially in the (GLn) direction. Conversely, when the gate direction signal (GDS) is a signal indicating the reverse direction (e.g., a low level signal), the gate driver 14 receives the reverse gate start pulse (GSPR) from the timing control unit 12 and operates from the gate line GLn to the gate. Scan signals are supplied sequentially in the direction of the line (GL1).

The gate driver 14 may include one or more gate driver integrated circuits. Each gate driver integrated circuit is connected to the bonding pad of the display panel 18 using a tape automated bonding (TAB) method or a chip on glass (COG) method, or is implemented and displayed as a GIP (Gate In Panel) type. It can be placed directly on panel 18. Additionally, the gate driver 14 may be integrated and disposed on the display panel 18, or may be implemented using a chip-on-film (COF) method mounted on a film connected to the display panel 18.

The timing control unit 12 aligns image data (RGB) input from the external device 100 according to the size and resolution of the display panel 18 and supplies it to the data driver 16. The timing control unit 12 controls synchronization signals input from the external device 100, such as a dot clock (DCLK), a data enable signal (DE), a horizontal synchronization signal (Hsync), a vertical synchronization signal (Vsync), and a placement direction signal. (AD) is used to generate a data direction signal (DDS) and a gate direction signal (GDS), and the generated data direction signal (DDS) and gate direction signal (GDS) are connected to the data driver 16 and the gate driver 14. supplied to each.

In one embodiment of the present invention, the timing control unit 12 controls the driving direction of the gate driver 14, the driving direction of the data driver 16, and the data driver 16 based on the arrangement direction signal AD input from an external device. ), it is possible to determine at least one of the supply order for each pixel of the image data (Vdata) supplied and the type of compensation data (Cdata) applied to the image data (Vdata).

As will be described later, the timing control unit 12 determines the supply order for each pixel P of the image data Vdata supplied to the data driver 16 based on the arrangement direction signal AD supplied from the external device 100. do. That is, the timing control unit 12 may maintain the supply order of the image data (Vdata) supplied to the data driver 16 according to the arrangement direction signal (AD), or change the supply order of the image data (Vdata) to the reverse order. It may be possible.

Meanwhile, since the physical characteristics of the elements (e.g., TFT) included in each pixel P included in the display panel 18 are different from each other, even if the same voltage is supplied to each pixel P, the Brightness may not appear uniformly. Accordingly, compensation data (Cdata) for each pixel (P) to compensate for the luminance deviation of each pixel (P) may be generated through a predetermined test process during the manufacturing process of the display panel 18. The compensation data (Cdata) generated in this way may be stored in the storage unit 20.

The timing control unit 12 acquires the compensation data (Cdata) stored in the storage unit 20, and applies the obtained compensation data (Cdata) to the image data (Vdata) to be supplied to the data driver 16 to produce image data (Vdata). can compensate. The timing control unit 12 supplies the compensated image data (Vdata) to the data driver 16.

As previously mentioned, compensation data (Cdata) is generated and stored for each pixel (P). As shown in the drawing, each pixel P is arranged in a matrix or array form on the display panel 18. Accordingly, the compensation data Cdata is generated as a value corresponding to the physical location of each pixel P, that is, the coordinates of each pixel P, and is stored in the storage unit 20. For example, Cdata(1, 1) means compensation data corresponding to the pixel located at (1, 1) among the pixels of the display panel 18, that is, P(1, 1), and Cdata(3840, 2160) means compensation data corresponding to a pixel located at (3840, 2160) among the pixels of the display panel 18, that is, P (3840, 2160).

Since each compensation data (Cdata) is a value generated according to the characteristics of the pixel (P) measured for each pixel (P) during the manufacturing process of the display panel 18, each compensation data (Cdata) must correspond to It must be applied to the image data (Vdata) corresponding to the location pixel (P). For example, if Cdata(1, 1) is applied to image data (Vdata) supplied to the pixel (P(3840, 2160)) located at (3840, 2160), P(3840, 2160) has appropriate luminance. Video cannot be output.

To prevent this problem, the timing control unit 12 may determine the type of compensation data (Cdata) applied to the image data (Vdata) supplied to each pixel (P).

In one embodiment of the present invention, several sets of compensation data (Cdata) corresponding to the arrangement direction of the display device 1 may be stored in the storage unit 20. The timing control unit 12 obtains a set of compensation data (Cdata) corresponding to the placement direction of the display device 1 confirmed based on the placement direction signal AD from the storage unit 20, and obtains a set of compensation data (Cdata) corresponding to the placement direction of the display device 1 confirmed based on the placement direction signal AD. ) set can be applied to the image data (Vdata) to be supplied to each pixel.

In another embodiment, only compensation data corresponding to the position of the pixel P, that is, basic compensation data Cdata, may be stored in the storage unit 20 when the arrangement direction of the display device 1 is the basic direction. The timing control unit 12 converts the basic compensation data Cdata into compensation data corresponding to the placement direction of the display device 1 based on the placement direction signal AD received from the external device 100, and converts the converted compensation data into compensation data corresponding to the placement direction of the display device 1. (Cdata) can be applied to image data (Vdata) to be supplied to each pixel.

The timing control unit 12 is a control printed circuit board connected to a source printed circuit board to which a source driver integrated circuit is bonded through a connection medium such as a flexible flat cable (FFC) or flexible printed circuit (FPC). It can be placed on a (Control Printed Circuit Board).

Hereinafter, a driving process according to the arrangement direction of the unit display device 1 constituting the multi-vision device according to the present invention will be described in detail with reference to FIGS. 2 to 6.

Figure 3 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the first direction.

Referring to FIG. 3, the display panel 18 of the unit display device includes a plurality of pixels P arranged in a matrix or array. Hereinafter, an embodiment of the present invention will be described using the display panel 18 including 3840×2160 pixels P as an example. As shown in the figure, each pixel is displayed in coordinate form (eg, P(1, 1)) according to its location.

Additionally, each pixel may be composed of a number of subpixels (eg, R, W, B, G) arranged in a predetermined order. Hereinafter, an embodiment of the present invention will be described taking as an example the case where one pixel is composed of subpixels arranged in the order of R, W, B, and G. However, the type of subpixels constituting each pixel and the arrangement order of the subpixels may vary depending on the embodiment.

Referring to the drawing again, a gate driver 14 is formed on one side of the display panel 18. Hereinafter, the description will be made assuming that the gate driver 14 is implemented on the display panel 18 using a gate in panel (GIP) method. However, the implementation method of the gate driver 14 may vary depending on the embodiment. there is.

Additionally, data drivers 16a and 16b are formed on one side of the display panel 18. In the embodiment described below, the data drivers 16a and 16b are mounted on the data circuit films 30a and 30b in the form of an integrated circuit. Both ends of the data circuit films 30a and 30b are bonded to one end of the display panel 18 and one end of the source printed circuit boards 32a and 32b, respectively.

The source printed circuit boards 32a and 32b are connected to the control printed circuit board 34 through a connection medium such as a flexible flat cable (FFC) or flexible printed circuit (FPC). A timing control unit 12 is disposed on the control printed circuit board 34. Although not shown in the drawing, a storage unit 20 may be disposed on the control printed circuit board 34.

Meanwhile, as shown in FIG. 3, when the gate driver 14 of the display device is disposed on the side in the X1 direction based on the display panel 18 and the data driver is disposed on the side in the Y2 direction based on the display panel 18, the display The device may be defined as being arranged in a first direction.

Hereinafter, the coordinates of each pixel are defined based on when the display device is arranged in the first direction, as shown in FIG. 3. Additionally, in the following, it is assumed that the basic compensation data Cdata of the display device is generated based on when the display device is arranged in the first direction as shown in FIG. 3. That is, among the basic compensation data (Cdata) stored in the storage unit 20, C(1, 1) is compensation data for P(1, 1), and C(3840, 1) is compensation data for P(3840, 1). This is compensation data.

Additionally, hereinafter, when the arrangement direction of the display device is the first direction, the display device is defined as being arranged in the 'basic direction'. However, depending on the embodiment, one of the second, third, and fourth directions described later, or another direction may be defined as the 'basic direction'.

When any one of the unit display devices DP1 to DP4 constituting the multi-vision device shown in FIG. 1 is arranged in the first direction as shown in FIG. 3, the user can display the corresponding display through the external device 100. Enter placement direction information (eg, 00) indicating that the placement direction of the device is the first direction. The arrangement direction information input in this way is transmitted to the timing control unit 12 by the external device 100 in the form of an arrangement direction signal AD.

When it is confirmed that the arrangement direction of the display device is the first direction by receiving the arrangement direction signal AD, the timing control unit 12 determines the driving direction of the gate driver 14 to be the forward direction. Accordingly, the timing control unit 12 supplies a gate direction signal (GDS) indicating a forward direction and a forward gate start pulse (GSPF) to the gate driver 14. Accordingly, the gate driver 14 sequentially applies the gate signal to each gate line in the forward direction, that is, in the Y1 → Y2 direction.

Additionally, when it is confirmed that the arrangement direction of the display device is the first direction, the timing control unit 12 determines the driving direction of the data drivers 16a and 16b to be the forward direction. Accordingly, the timing control unit 12 supplies the data direction signal DDS indicating the forward direction to the data drivers 16a and 16b. Accordingly, the data drivers 16a and 16b are sequentially driven in the forward direction, that is, in the direction X1 → X2, and supply data signals to each data line.

Additionally, when it is confirmed that the display device is arranged in the first direction, the timing control unit 12 maintains the pixel-by-pixel supply order of the image data Vdata supplied to the data drivers 16a and 16b. In the present invention, the timing control unit 12 converts the image signal (RGB) supplied from the external device 100 into the subpixel arrangement order when the display device is arranged in the first direction, that is, R, W, B, as shown in FIG. 3. Image data (Vdata) is generated by sorting in the order of G. Therefore, when the arrangement direction of the display device is the first direction, the timing control unit 12 maintains the pixel-by-pixel supply order of the image data (Vdata) to be supplied to the data drivers 16a and 16b, that is, in the order of R, W, B, and G. keep it as

In addition, when it is confirmed that the arrangement direction of the display device is the first direction, the timing control unit 12 acquires the basic compensation data (Cdata) stored in the storage unit 20, and transfers the obtained basic compensation data (Cdata) to each pixel as is. Applies to video data (Vdata) to be supplied. As described above, the basic compensation data (Cdata) is generated based on the position of each pixel when the display device is arranged in the first direction, so if the display device is arranged in the first direction, the timing control unit 12 performs basic compensation The data (Cdata) can be used as is without any separate conversion.

Meanwhile, as mentioned above, in another embodiment of the present invention, in addition to the basic compensation data (Cdata) set, the storage unit 20 contains other compensation data (Cdata) sets generated based on when the display device is arranged in a different direction. It may also be saved. In this embodiment, the timing control unit 12 obtains a first compensation data set (same as the basic compensation data set) corresponding to the direction of the display device confirmed by the arrangement direction signal AD, that is, the first direction, Each compensation data (Cdata) included in the obtained compensation data set is applied to the image data (Vdata) to be supplied to each pixel.

Figure 4 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the second direction.

As shown in Figure 4, when the gate driver 14 of the display device is disposed on the side in the X2 direction based on the display panel 18 and the data driver is disposed on the side in the Y1 direction based on the display panel 18, the display device It may be defined as being arranged in the second direction. For reference, the display device shown in FIG. 4 is the display device shown in FIG. 3 rotated by 180°.

When any one of the unit display devices DP1 to DP4 constituting the multi-vision device shown in FIG. 1 is arranged in the second direction as shown in FIG. 4, the user can display the corresponding display through the external device 100. Enter placement direction information (eg, 01) indicating that the placement direction of the device is the second direction. The arrangement direction information input in this way is transmitted to the timing control unit 12 by the external device 100 in the form of an arrangement direction signal AD.

When it is confirmed that the arrangement direction of the display device is in the second direction by receiving the arrangement direction signal AD, the timing control unit 12 changes the driving direction of the gate driver 14 in the opposite direction to when the display device is in the first direction. , that is, it is decided in the reverse direction. This is because, as the display device is arranged in the second direction as shown in FIG. 4, a scan signal must be applied in the direction P(3840, 2160) → P(3840, 1) to properly display the image. Accordingly, the timing control unit 12 supplies a gate direction signal (GDS) indicating the reverse direction and a reverse gate start pulse (GSPR) to the gate driver 14. Accordingly, the gate driver 14 sequentially applies the gate signal to each gate line in the reverse direction, that is, in the Y1 → Y2 direction.

Additionally, when it is confirmed that the arrangement direction of the display device is in the second direction, the timing control unit 12 determines the driving direction of the data drivers 16a and 16b to be in the opposite direction to when the display device is in the first direction, that is, in the reverse direction. . This is because, as the display device is arranged in the second direction as shown in FIG. 4, the data signal must be applied in the direction P(3840, 2160) → P(1, 2160) to properly display the image. Accordingly, the timing control unit 12 supplies the data direction signal DDS indicating the reverse direction to the data drivers 16a and 16b. Accordingly, the data drivers 16a and 16b are sequentially driven in the reverse direction, that is, from X1 to X2, to supply data signals to each data line.

Meanwhile, when it is confirmed that the arrangement direction of the display device is in the second direction, the timing control unit 12 reverses the supply order for each pixel of the image data Vdata supplied to the data drivers 16a and 16b.

As mentioned above, the timing control unit 12 converts the image signal (RGB) supplied from the external device 100 into the subpixel arrangement order when the display device is arranged in the first direction, that is, R, W, Sort in the order of B and G to generate image data (Vdata). However, when the display device is arranged in the second direction as shown in FIG. 4, the subpixels constituting each pixel are arranged in the order of G, B, W, and R, not R, W, B, and G, so in order for the image to be displayed properly, the image must be Data must also be supplied in the order G, B, W, and R.

Therefore, when the arrangement direction of the display device is the second direction, the timing control unit 12 reverses the supply order for each pixel of the image data (Vdata) generated in the order of R, W, B, and G, that is, G, B, W , R changes in order to supply image data to the data drivers 16a and 16b.

In addition, when it is confirmed that the arrangement direction of the display device is in the second direction, the timing control unit 12 acquires the basic compensation data (Cdata) stored in the storage unit 20 and transfers the obtained basic compensation data (Cdata) to the second direction. Convert it to correspond to and apply it to the image data (Vdata) to be supplied to each pixel.

As described above, the basic compensation data Cdata is generated based on the position of each pixel when the display device is arranged in the first direction. Therefore, if the basic compensation data (Cdata) is applied as is to the display device arranged in the second direction, compensation of the image data cannot be performed accurately.

For example, if the basic compensation data (Cdata) is applied as is to the display device in FIG. 4, C(1, 1) is applied to P(3840, 2160), and C(3840, 1) is applied to P(1, 2160). . Also, C(1, 2160) is applied to P(3840, 1), and C(3840, 2160) is applied to P(1, 1).

In order to prevent compensation data from being incorrectly applied, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20. For example, when the display device is arranged as shown in FIG. 4, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20 to be symmetrical about the X-axis and Y-axis. By this conversion, C(1, 1) is applied to P(1, 1), and C(3840, 1) is applied to P(3840, 1). Also, C(1, 2160) is applied to P(1, 2160), and C(3840, 2160) is applied to P(3840, 2160).

Meanwhile, as mentioned above, in another embodiment of the present invention, in addition to the basic compensation data (Cdata) set, the storage unit 20 contains other compensation data (Cdata) sets generated based on when the display device is arranged in a different direction. It may also be saved. In this case, the timing control unit 12 creates a second compensation data set (the basic compensation data set is symmetrical about the A set of compensation data that has been converted to , is acquired, and each compensation data (Cdata) included in the obtained compensation data set is applied to the image data (Vdata) to be supplied to each pixel.

Figure 5 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the third direction.

As shown in Figure 5, when the gate driver 14 of the display device is disposed on the side in the X2 direction based on the display panel 18 and the data driver is disposed on the side in the Y2 direction based on the display panel 18, the display device It can be defined as being arranged in a third direction. For reference, the display device shown in FIG. 5 is a form in which the display device shown in FIG. 3 is converted to be symmetrical about the Y axis.

When any one of the unit display devices DP1 to DP4 constituting the multi-vision device shown in FIG. 1 is arranged in the third direction as shown in FIG. 5, the user can display the corresponding display through the external device 100. Enter placement direction information (eg, 10) indicating that the placement direction of the device is the third direction. The arrangement direction information input in this way is transmitted to the timing control unit 12 by the external device 100 in the form of an arrangement direction signal AD.

When it is confirmed that the arrangement direction of the display device is the third direction by receiving the arrangement direction signal AD, the timing control unit 12 determines the driving direction of the gate driver 14 to be the forward direction. This is because, as the display device is arranged in the third direction as shown in FIG. 5, a scan signal must be applied in the direction P(3840, 1) → P(1, 2160) to properly display the image. Accordingly, the timing control unit 12 supplies a gate direction signal (GDS) indicating a forward direction and a forward gate start pulse (GSPF) to the gate driver 14. Accordingly, the gate driver 14 sequentially applies the gate signal to each gate line in the forward direction, that is, in the Y1 → Y2 direction.

Additionally, when it is confirmed that the arrangement direction of the display device is the third direction, the timing control unit 12 determines the driving direction of the data drivers 16a and 16b so that the display device is in the forward direction. Accordingly, the timing control unit 12 supplies the data direction signal DDS indicating the forward direction to the data drivers 16a and 16b. Accordingly, the data drivers 16a and 16b are sequentially driven in the forward direction, that is, in the direction X1 → X2, and supply data signals to each data line.

Meanwhile, when it is confirmed that the arrangement direction of the display device is in the third direction, the timing control unit 12 changes the supply order of the image data Vdata supplied to the data drivers 16a and 16b for each pixel in reverse order. When the display device is arranged in the third direction as shown in FIG. 5, the subpixels constituting each pixel are arranged in the order of G, B, W, and R, not R, W, B, and G. Therefore, in order for the image to be displayed properly, the image data must be Additionally, they must be supplied in the following order: G, B, W, and R.

Therefore, when the arrangement direction of the display device is the second direction, the timing control unit 12 reverses the supply order for each pixel of the image data (Vdata) generated in the order of R, W, B, and G, that is, G, B, W , R changes in order to supply image data to the data drivers 16a and 16b.

In addition, when it is confirmed that the arrangement direction of the display device is in the third direction, the timing control unit 12 acquires the basic compensation data (Cdata) stored in the storage unit 20 and transfers the obtained basic compensation data (Cdata) to the third direction. Convert it to correspond to and apply it to the image data (Vdata) to be supplied to each pixel.

If the basic compensation data (Cdata) is applied as is to the display device of FIG. 5, C(1, 1) is applied to P(3840, 1), and C(3840, 1) is applied to P(1, 1). . Also, C(1, 2160) is applied to P(3840, 2160), and C(3840, 2160) is applied to P(1, 2160).

In order to prevent compensation data from being incorrectly applied, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20. For example, when the display device is arranged as shown in FIG. 5, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20 to be symmetrical about the Y axis. By this conversion, C(1, 1) is applied to P(1, 1), and C(3840, 1) is applied to P(3840, 1). Also, C(1, 2160) is applied to P(1, 2160), and C(3840, 2160) is applied to P(3840, 2160).

Meanwhile, as mentioned above, in another embodiment of the present invention, in addition to the basic compensation data (Cdata) set, the storage unit 20 contains other compensation data (Cdata) sets generated based on when the display device is arranged in a different direction. It may also be saved. In this case, the timing control unit 12 generates a third compensation data set (the basic compensation data set is converted to be symmetrical about the Y axis) corresponding to the direction of the display device confirmed by the arrangement direction signal AD, that is, the third direction. A set of compensation data) is acquired, and each compensation data (Cdata) included in the obtained compensation data set is applied to the image data (Vdata) to be supplied to each pixel.

Figure 6 shows a state in which the arrangement direction of the unit display device according to an embodiment of the present invention is the fourth direction.

As shown in FIG. 6, when the gate driver 14 of the display device is disposed on the side in the X1 direction based on the display panel 18 and the data driver is disposed on the side in the Y1 direction based on the display panel 18, the display device It can be defined as being arranged in the fourth direction. For reference, the display device shown in FIG. 6 is a conversion of the display device shown in FIG. 4 based on the Y axis.

When any one of the unit display devices DP1 to DP4 constituting the multi-vision device shown in FIG. 1 is arranged in the fourth direction as shown in FIG. 6, the user can display the corresponding display through the external device 100. Enter placement direction information (eg, 11) indicating that the placement direction of the device is the fourth direction. The arrangement direction information input in this way is transmitted to the timing control unit 12 by the external device 100 in the form of an arrangement direction signal AD.

When it is confirmed that the arrangement direction of the display device is in the fourth direction by receiving the arrangement direction signal AD, the timing control unit 12 changes the driving direction of the gate driver 14 in the opposite direction to when the display device is in the first direction. , that is, it is decided in the reverse direction. This is because, as the display device is arranged in the fourth direction as shown in FIG. 6, a scan signal must be applied in the direction P(1, 2160) → P(1, 1) in order to properly display an image. Accordingly, the timing control unit 12 supplies a gate direction signal (GDS) indicating the reverse direction and a reverse gate start pulse (GSPR) to the gate driver 14. Accordingly, the gate driver 14 sequentially applies the gate signal to each gate line in the reverse direction, that is, in the Y1 → Y2 direction.

Additionally, when it is confirmed that the arrangement direction of the display device is in the fourth direction, the timing control unit 12 determines the driving direction of the data drivers 16a and 16b to be in the opposite direction from when the display device is in the first direction, that is, in the reverse direction. . This is because, as the display device is arranged in the second direction as shown in FIG. 4, the data signal must be applied in the direction P(1, 2160) → P(3840, 2160) to properly display the image. Accordingly, the timing control unit 12 supplies the data direction signal DDS indicating the reverse direction to the data drivers 16a and 16b. Accordingly, the data drivers 16a and 16b are sequentially driven in the reverse direction, that is, from X1 to X2, to supply data signals to each data line.

Meanwhile, when it is confirmed that the arrangement direction of the display device is the fourth direction, the timing control unit 12 maintains the pixel-by-pixel supply order of the image data Vdata supplied to the data drivers 16a and 16b. This is because, as shown in FIG. 6, when the arrangement direction of the display device is the fourth direction, the subpixels constituting each pixel are arranged in the order of R, W, B, and G.

In addition, when it is confirmed that the arrangement direction of the display device is in the fourth direction, the timing control unit 12 acquires the basic compensation data (Cdata) stored in the storage unit 20 and transfers the obtained basic compensation data (Cdata) to the fourth direction. Convert it to correspond to and apply it to the image data (Vdata) to be supplied to each pixel.

If the basic compensation data (Cdata) is applied as is to the display device of FIG. 6, C(1, 1) is applied to P(1, 2160), and C(3840, 1) is applied to P(3840, 2160). . Also, C(1, 2160) is applied to P(1, 1), and C(3840, 2160) is applied to P(3840, 1).

In order to prevent compensation data from being incorrectly applied, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20. For example, when the display device is arranged as shown in FIG. 4, the timing control unit 12 converts the basic compensation data (Cdata) obtained from the storage unit 20 to be symmetrical about the X-axis. By this conversion, C(1, 1) is applied to P(1, 1), and C(3840, 1) is applied to P(3840, 1). Also, C(1, 2160) is applied to P(1, 2160), and C(3840, 2160) is applied to P(3840, 2160).

Meanwhile, as mentioned above, in another embodiment of the present invention, in addition to the basic compensation data (Cdata) set, the storage unit 20 contains other compensation data (Cdata) sets generated based on when the display device is arranged in a different direction. It may also be saved. In this case, the timing control unit 12 converts the second compensation data set (the basic compensation data set) corresponding to the direction of the display device confirmed by the arrangement direction signal AD, that is, the second direction, to be symmetrical about the A set of compensation data) is acquired, and each compensation data (Cdata) included in the obtained compensation data set is applied to the image data (Vdata) to be supplied to each pixel.

According to the present invention described so far, simply by setting the arrangement direction of each unit display device constituting the multi-vision system through an external device, the driving direction of each unit display device is automatically set, and compensation data is stored in each unit display device. It is automatically applied to suit the driving direction. Therefore, when configuring a multi-vision system, the user can avoid the inconvenience of manually modifying the settings of the unit display device.

In addition, according to the present invention, when displaying a single image using a multi-vision system, the unit display devices can be automatically driven in an optimal state according to the direction in which each unit display device is arranged, so that multiple display devices can be used to display multiple images. It is easy to implement a large-area display of any size.

The above-described present invention may be subject to various substitutions, modifications, and changes without departing from the technical spirit of the present invention to those skilled in the art to which the present invention pertains. It is not limited by .

Claims (12)

In a multi-vision device consisting of a plurality of unit display devices and displaying a single image,
The unit display device is
A display panel including a plurality of pixels;
a gate driver that supplies gate signals to a plurality of gate lines arranged on the display panel;
a data driver that supplies data signals to a plurality of data lines disposed on the display panel;
A timing control unit that controls the gate driver and the data driver,
The timing control unit
Based on an arrangement direction signal input from an external device, at least one of a driving direction of the gate driver, a driving direction of the data driver, and a pixel-by-pixel supply order of image data supplied to the data driver is determined, and the arrangement direction signal is Contains information indicating the direction in which the gate driver and the data driver are arranged relative to the display panel of each of the unit display devices in the multi-vision device,
The timing control unit
Obtain basic compensation data corresponding to the characteristics of each pixel from a storage unit, and set the coordinates of the basic compensation data to the coordinates of compensation data applied to the image data according to the arrangement direction signal, or set the coordinates of the basic compensation data to the coordinates of the compensation data applied to the image data. A multi-vision device that sets the coordinates of the compensation data by converting the coordinates to be symmetrical with respect to at least one of the X-axis and Y-axis.
According to paragraph 1,
The timing control unit
Determining the driving direction of the gate driver as forward or reverse based on the arrangement direction signal.
Multi-vision device.
According to paragraph 1,
The timing control unit
Determining the driving direction of the data driver as forward or reverse based on the arrangement direction signal
Multi-vision device.
According to paragraph 1,
The timing control unit
Based on the arrangement direction signal, the supply order of each pixel of the image data is maintained or changed to the reverse order.
Multi-vision device.
delete delete A display panel including a plurality of pixels;
a gate driver that supplies gate signals to a plurality of gate lines arranged on the display panel;
a data driver that supplies data signals to a plurality of data lines disposed on the display panel;
A timing control unit that controls the gate driver and the data driver,
The timing control unit
Based on an arrangement direction signal input from an external device, at least one of a driving direction of the gate driver, a driving direction of the data driver, and a pixel-by-pixel supply order of image data supplied to the data driver is determined, and the arrangement direction signal is Contains information indicating the direction in which the gate driver and the data driver are arranged relative to the display panel of each unit display device in the multi-vision device,
The timing control unit
Obtain basic compensation data corresponding to the characteristics of each pixel from a storage unit, and set the coordinates of the basic compensation data to the coordinates of compensation data applied to the image data according to the arrangement direction signal, or set the coordinates of the basic compensation data to the coordinates of the compensation data applied to the image data. A display device that sets the coordinates of the compensation data by converting the coordinates to be symmetrical with respect to at least one of the X-axis and the Y-axis.
In clause 7,
The timing control unit
Determining the driving direction of the gate driver as forward or reverse based on the arrangement direction signal.
display device.
In clause 7,
The timing control unit
Determining the driving direction of the data driver as forward or reverse based on the arrangement direction signal
display device.
In clause 7,
The timing control unit
Based on the arrangement direction signal, the supply order of each pixel of the image data is maintained or changed to the reverse order.
display device.
delete delete

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