KR20190017501A - Data driver, display device, and method for driving the display device - Google Patents

Abstract

Embodiments of the present invention relate to a data driving circuit, a display device, and a driving method of the display device and, more specifically, to a data driving circuit, a display device, and a driving method of the display device capable of setting a protection region requiring information protection and freely limiting a viewing angle direction in which an image of the protection region is displayed. In addition, various viewing angle directions in which different images are displayed may be set. Moreover, different images according to the viewing angle direction may be displayed while minimizing complexity of hardware.

Description

TECHNICAL FIELD [0001] The present invention relates to a data driving circuit, a display device, and a driving method of the display device.

The present invention relates to a data driving circuit, a display panel and a driving method of the data driving circuit.

2. Description of the Related Art [0002] As an information-oriented society develops, demands for a display device for displaying an image have increased in various forms. Recently, a liquid crystal display (LCD), a plasma display, OLED: Organic Light Emitting Display) and the like.

Most existing display devices are two-dimensional flat panel display devices, and have been developed so as to provide images as uniform as possible over a wide angle range of the front surface of the display device. Even if the user observes the image displayed on the display device in various viewing angle directions on the front face of the display device, high quality image information can be provided. Therefore, there is an advantage that the convenience of the user can be increased. Also, there is an advantage that a plurality of users can receive the same image information at the same time in various positions.

On the other hand, in some fields, providing a uniform image in various viewing angles can be a disadvantage. For example, portable personal devices such as smart phones, notebooks, tablets, and authentication devices applied to financial institutions, government offices, and security systems need to be limited in the viewing angle direction for privacy protection or information protection.

In recent years, electronic devices have been developed as general purpose devices so that functions performed according to the applications to be executed can be changed. Therefore, a display device is required to provide a wide or multiple viewing angle direction or to provide a limited viewing angle direction according to various situations (for example, an executed application, a user's privacy instruction, etc.).

In particular, since a plurality of applications can be simultaneously executed in one electronic device, a display device capable of limiting the viewing angle direction only or displaying different images according to the viewing angle direction, Is required. There is also a need for a display device capable of displaying different images according to the viewing angle direction while minimizing hardware complexity.

In this background, the embodiments provide a data driving circuit, a display device, and a driving method of a display device, which can control a direction in which areas requiring information protection can be distinguished and viewed, or information displayed according to a viewing angle can be controlled differently.

In addition, the embodiments provide a data driving circuit, a display device, and a method of driving a display device that can adjust an image to be displayed for each viewing angle direction.

Further, the embodiments provide a data driving circuit, a display device, and a driving method of a display device that can display different images according to the viewing angle direction while minimizing hardware complexity.

In one aspect, the present embodiments are directed to a liquid crystal display in which a plurality of pixels defined by a plurality of data lines and a plurality of gate lines are arranged, and two or more pixels corresponding to different viewing angle directions of the plurality of pixels form one pixel group A display device includes a display panel, a controller, and a data driving circuit.

In this case, the controller sets a protection area for displaying the image on the display panel in accordance with the viewing angle direction, and outputs a mode control signal corresponding to the set protection area.

The data driving circuit may output the image data voltage to at least one pixel in the pixel group in the protection area according to the mode control signal and output a predetermined background voltage to the remaining pixels.

The data driving circuit selects a voltage to be output to each of two or more pixels of a pixel group among a video data voltage and a background voltage in accordance with a mode control signal and drives the selected voltage to be transmitted through a corresponding one of the plurality of data lines And a switch unit.

The drive switch unit may include a switch control signal generator for generating at least one switch control signal using a mode control signal and one of a video data voltage and a background voltage according to a corresponding switch control signal among at least one switch control signal And a switch unit for transmitting the data to the corresponding data line.

The data driving circuit may further include a background voltage obtaining unit for converting the previously designated background data into a background voltage.

The controller may include a mode setting unit that sets a protection mode according to mode information transmitted together with input video data.

The controller may include a protection area setting unit for setting a protection area in accordance with the protection area information transmitted together with the input video data in the protection mode.

The controller may include a mode control signal setting unit for setting a mode control signal for the protection area and transmitting the input image data together with the converted image data to the data driving circuit.

In another aspect, the present embodiments can provide a data driving circuit including a video data switching section and a driving switch section.

The image data switching unit receives the image data and converts image data voltages for driving the data lines connected to the pixels of the display panel in which two or more pixels corresponding to different viewing angle directions of the plurality of pixels form one pixel group You can switch.

The driving switch unit outputs the image data voltage to at least one pixel in the pixel group in the protection area for displaying the image according to the viewing angle direction according to the mode control signal applied together with the image data, Can be output.

The switch section includes a plurality of switches, one end of which is connected to the data line for the corresponding one of the two or more pixels of the pixel group and the other end is connected to one of the background voltage or the image data voltage in accordance with the corresponding switch control signal .

In yet another aspect, the present embodiments can provide a method of driving a display device including a display panel in which two or more pixels corresponding to different viewing angle directions of a plurality of pixels form a group of pixels.

A method of driving a display device includes the steps of setting a protection mode, a protection area and a mode control signal by receiving mode information and protection area information together with input image data, and dividing the image in the display panel according to a viewing angle direction according to a mode control signal Outputting the image data voltage corresponding to the input image data to at least one pixel in the pixel group in the protection area for display and outputting the predetermined background voltage to the remaining pixels.

In another aspect of the present invention, the embodiments may include a video data switching unit for converting video data into video data voltages and a driving switch unit for outputting corresponding video data voltages for a plurality of data lines.

Wherein the plurality of data lines may include two or more first data lines corresponding to two or more adjacent first pixels and two or more second data lines corresponding to two or more adjacent second pixels.

During the protection mode period, the same video data voltage may be output to both of the first and second data lines, and the remaining video data voltages may be output to at least one of the second and third data lines. Here, during the protection mode period, at least one of the position and the number of the second pixels may be varied.

According to the embodiments described above, it is possible to provide a data driving circuit which sets a protection area requiring information protection, controls a viewing angle direction that can be viewed with respect to the protection area, or controls image information displayed in each viewing angle direction differently, And a method of driving the display device.

According to the embodiments, it is possible to provide a data driving circuit, a display device, and a method of driving a display device in which a viewing angle direction in which different images are displayed can be variously set.

According to the embodiments, it is possible to provide a data driving circuit, a display device, and a driving method of a display device that can display different images according to the viewing angle direction while minimizing hardware complexity.

1 is a schematic system configuration diagram of a display apparatus 100 according to the present embodiments.
FIG. 2 is a view showing a concept in which a different image is displayed according to the viewing angle direction by the pixel group in the display device 100 of FIG.
3 is a diagram illustrating a sub-pixel and barrier alignment structure according to the present embodiments.
4 shows an example of an image displayed in the protection mode according to the information protection scheme.
Figure 5 is a block diagram of the controller of Figure 1;
6 is a block diagram of the drive switch unit of FIG.
Fig. 7 shows an embodiment of the switch unit of Fig.
Fig. 8 shows an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.
9 shows the timing of the mode control signal transmitted to the data driving circuit.
Fig. 10 shows another embodiment of the switch unit of Fig.
Figs. 11 and 12 show an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.
13 shows another embodiment of the switch unit of Fig.
Fig. 14 shows an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.
15 is a flowchart of a method of driving a display device according to the present embodiments.
16 is an illustration of a subpixel structure in the display panel 110 according to embodiments.

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.

FIG. 1 is a schematic system configuration diagram of a display apparatus 100 according to the present embodiment. FIG. 2 is a view showing a concept in which a different image is displayed along a viewing angle direction by pixel groups in the display apparatus 100 of FIG. 1 And FIG. 3 is a diagram illustrating a sub-pixel and barrier alignment structure according to the present embodiments.

Referring to FIG. 1, a display device 100 according to the present embodiment includes a plurality of data lines DL and a plurality of gate lines GL, A data driving circuit 120 driving a plurality of data lines DL; a gate driving circuit 130 driving a plurality of gate lines GL; a data driving circuit 120; And a controller 140 for controlling the gate driving circuit 130 and the like.

The plurality of pixels P formed on the display panel 110 may form one pixel group PG by two or more pixels corresponding to two or more different light emitting directions.

For example, each of the pixel groups PG may form one pixel group PG as shown in FIG. 1, and three pixels P1 to P3 adjacent to each other in the direction in which the gate line GL extends . The first pixel P1 of the three pixels P1 to P3 forming the pixel group is a pixel arranged to display the image in the first angular range predetermined around the vertical direction with respect to the front surface of the display panel 110 to be.

And the second and third pixels P2 and P3 are pixels arranged to display the image in the second angular range and the third angular range, respectively, at least a part of which is not overlapped with the first angular range at the front face of the display panel . Here, the second angular range and the third angular range may be angular ranges symmetrical to each other with respect to the vertical direction of the front surface of the display panel 110.

For example, the second pixel P2 is a pixel for displaying an image in the right (or left) viewing angle direction with respect to the vertical direction of the front surface of the display panel 110, and the third pixel P3 is a pixel for displaying the left (or right) And may be a pixel for displaying an image in a viewing angle direction.

In the present invention, the light emission direction is a representation expression in terms of the display panel 110, and the angular range of the light emission direction of each of the first to third pixels is the above-described first to third angle ranges. The viewing angle direction is the same as the light emitting direction in terms of the user's point of view, and is hereinafter referred to as the viewing angle direction for convenience of explanation.

Various methods have been proposed for controlling the two or more pixels included in the pixel group PG to display images in different viewing angle directions. However, in the present invention, the barrier 160 is used to control the viewing angle of each pixel Is controlled.

The barrier 160 is formed with an opening 161 and a blocking portion 162. The opening 161 of the barrier 160 is located in a part of the pixel group PG to transmit light and the blocking part 162 is located in the remaining area of the pixel group PG to shield the light.

The barrier 160 may be disposed on the front surface of the display panel 110 when the display device 100 is implemented as an organic light emitting display or a plasma display, As shown in FIG.

2, the opening 161 of the barrier 110 is disposed in a region corresponding to one pixel P of the pixel group PG, and the blocking portion 162 is disposed in a region corresponding to the pixel P so as to be alternated with the opening 161. [ And is arranged in an area corresponding to the remaining pixels P of the group PG. For example, the opening 161 overlaps with the first pixel P1, and the blocking portion 162 overlaps with the second and third pixels P2 and P3.

Thus, the image displayed from the first pixel P1 is provided to the user viewing through the opening 161 in the first angular range V1, and the image displayed from the second pixel P2 is provided to the user through the opening 161 And the image displayed from the third pixel P3 may be provided to the user viewing through the opening 161 in the third angular range V3 have. That is, the first to third pixels P1 to P3 of each pixel group PG are controlled to display images in the center, right, and left directions of the display panel 110, respectively .

Although each pixel group PG is shown as including three pixels P1 to P3 in the above description, the pixel group PG may be configured to include two or more pixels. For example, even if the pixel group PG is configured to include two pixels P1 and P2, the second pixel P2 disposed on both sides of the first pixel P1 and the opening 161 of the barrier 160, The image can be displayed in the second angular range and the third angular range.

Each of the plurality of pixels P formed on the display panel 110 may include one or more subpixels defined by a plurality of data lines DL and a plurality of gate lines GL. When the display device 100 is configured to display various colors, one pixel may have a plurality of sub-pixels representing different colors.

In general, when one pixel is provided with a plurality of subpixels, one pixel includes subpixels of three colors (R, G, B) or four colors (R, G, B, W) can do. The number of subpixels included in one pixel and the color of each subpixel can be variously adjusted according to a driving method, a panel design method, and the like.

3A shows a case where the pixel P includes subpixels of three colors R, G, and B and subpixels of three colors R, G, and B are arranged in a stripe form Respectively. In this case, the positions of the openings 161 and blocking portions 162 of the barrier 160 may be arranged so as to alternate in a stripe shape corresponding to the arrangement of the subpixels.

3B shows a case where the pixel P includes subpixels of four colors (R, G, B, and W), and the positions of subpixels for each color are shifted for each horizontal line. The opening 161 and the blocking portion 162 of the barrier 160 are also formed so as to be shifted from each other along the horizontal line so that the opening 161 can be prevented from being disposed so as to correspond only to pixels of a specific color.

In addition, the openings 161 and the blocking portions 162 of the barrier 160 may be variously changed according to the number and arrangement of subpixels included in the pixels.

In the present invention, a method of controlling the viewing angle direction of a pixel using the barrier 160 is a simple example, and another viewing angle control method such as a method using a lenticular lens film may be applied. However, the viewing angle direction provided by two or more pixels of the pixel group PG according to each method can be set differently from that in Fig.

1, the controller 140 supplies various control signals DCS and GCS to the data driving circuit 120 and the gate driving circuit 130 to drive the data driving circuit 120 and the gate driving circuit 130 130).

The controller 140 starts the scanning in accordance with the timing to be implemented in each frame and supplies the input image data input from the outside (for example, a host apparatus) to the data driving circuit 120 in accordance with the data signal format used in the data driving circuit 120 And outputs the converted image data (DATA), and controls the data driving at a proper time according to the scan.

The controller 140 may be a timing controller used in a conventional display technology or a control device including a timing controller to perform other control functions.

The controller 140 may be implemented as a separate component from the data driving circuit 120 and may be implemented as an integrated circuit together with the data driving circuit 120.

In particular, in the present invention, the controller 140 receives the mode information and the protection area information together with the input image data, sets the protection mode according to the mode information, and sets the protection area according to the protection area information.

Here, the protection area is an area for displaying images in accordance with two or more viewing angle directions corresponding to two or more light emitting directions of pixels included in the pixel group PG in the display panel 110. [ The controller 140 separates the mode control signal con for the set protection area and the mode control signal con for the area other than the protection area and outputs the separated mode control signal con to the data driving circuit 120.

At this time, the controller 140 may transmit the mode control signal con with the image data (DATA). That is, the controller 140 outputs the mode control signal con corresponding to the entire area of the display panel 110 together with the image data (DATA) for the image to be displayed through the display panel 110, The mode control signal con is output in a different setting from the mode control signal con for the remaining area.

The controller 140 sets the protection area, separates the mode control signal corresponding to the set protection area, and outputs the divided mode control signal to the data driving circuit 120. In the present invention, only the partial area set as the protection area of the display panel 110 It is possible to display different images according to the viewing angle direction and display the same image regardless of the viewing angle direction in the remaining area.

 The controller 140 may vary the setting of the mode control signal con by using the viewing angle direction information included in the protection area information so that the pixel values of the mode control signal con may be varied by each of the pixels P1- The image to be displayed can be controlled differently.

The data driving circuit 120 drives the plurality of data lines DL by supplying image data voltages to the plurality of data lines DL. Here, the data driving circuit 120 is also referred to as a source driver.

The data driving circuit 120 may include a video data switching unit 220 and a driving switch unit 250 as shown in FIG.

The data switching unit 220 may include at least one source driver integrated circuit (SDIC).

Each source driver integrated circuit (SDIC) may include a shift register, a latch circuit, a digital to analog converter (DAC), an output buffer, and the like.

Each source driver integrated circuit (SDIC) may further include an analog to digital converter (ADC), as the case may be.

The data switching unit 220 converts the video data (DATA) received from the controller 140 into a video data voltage of an analog form.

The drive switch unit 250 receives the mode control signal from the controller 140 and generates at least one switch control signal using the received mode control signal con.

At this time, the driving switch unit 250 generates a switch control signal for the protection area and a switch control signal for the remaining area differently according to the mode control signal con received separately for the protection area and the other area.

The driving switch unit 250 outputs the image data voltage to at least one of the two or more pixels of the pixel group included in the protection area according to the generated switch control signal, . Here, the other voltage may be a predetermined background voltage, for example.

The driving switch unit 250 may supply a video data voltage or another voltage to each pixel through a plurality of data lines DL.

That is, at least one of the two or more pixels of the pixel group expresses the image according to the image data voltage, and the remaining pixels express the image according to the different voltage. Therefore, different images can be displayed depending on the viewing angle direction.

On the other hand, for the pixels of the pixel group included in the area other than the protection area, the video data voltage is outputted.

 The gate driving circuit 130 sequentially drives the plurality of gate lines GL by sequentially supplying scan signals to the plurality of gate lines GL. Here, the gate drive circuit 130 is also referred to as a scan driver.

Such a gate driving circuit 130 may be implemented by including at least one gate driver integrated circuit (GDIC).

Each gate driver integrated circuit GDIC may include a shift register, a level shifter, and the like.

The gate driving circuit 130 sequentially supplies a scan signal of an On voltage or an Off voltage to the plurality of gate lines GL under the control of the controller 140.

1, the data driving circuit 120 may be located only on one side (e.g., on the upper side or the lower side) of the display panel 110, and in some cases, on the display panel 110 (E.g., the upper side and the lower side)

1, the gate drive circuit 130 may be located only on one side (e.g., left side or right side) of the display panel 110, and in some cases, depending on a driving method, (E.g., left and right sides) of the housing 110.

The data driving circuit 120 and the gate driving circuit 130 may be connected to one side (e.g., upper side, lower side, left side or right side) or both sides (e.g., upper side and lower side) of the display panel 110 Left < / RTI > and right)

The display device 100 according to the present embodiments may be implemented as an organic light emitting display device, a liquid crystal display device, a plasma display device, or other display device.

When the display device 100 according to the present embodiments is implemented as an organic light emitting display device, each of the sub pixels arranged in the display panel 110 includes an organic light emitting diode (OLED) And a circuit element such as a driving transistor for driving the organic light emitting diode OLED.

4 shows an example of an image displayed in the protection mode according to the information protection scheme.

When two or more pixels in the display panel 110 are configured to form a pixel group PG to provide different viewing angle directions, as shown in FIGS. 4A to 4C, Method can be applied.

(a) shows an image in accordance with image data to be protected only in a specific viewing angle direction specified with respect to the entire display area of the display panel 110 in the protected mode, and displays a single color It is a way to display images.

Hereinafter, video data to be protected is referred to as protected video data.

(a), the data driving circuit 120 receives the protection video data corresponding to each pixel group PG, converts the received protection video data into the video data voltage, And outputs it to the corresponding pixel. That is, a protected image. And outputs the background voltage corresponding to the pre-designated background image as the remaining pixels.

Here, the background image is generally set as a black monochromatic image, and is not previously changed in the data driving circuit 120. Also, the viewing angle direction in which the image according to the image data is displayed is also generally designated as the front of the display device 100 and is not adjusted.

Therefore, in the method (a), information can be protected by displaying only a predetermined background image in the viewing angle direction other than the designated viewing angle direction.

Here, the data driving circuit 120 applies the same background voltage to all the pixel groups PG of the display panel 110. Therefore, it is not necessary to generate a separate background voltage for each pixel group PG, and the data driving circuit 120 converts only one video data corresponding to each pixel group PG into a video data voltage. As a result, the structure of the data driving circuit 120 can be greatly simplified.

However, since the view angle direction in which the protected image is displayed is designated as a specific direction (in this case, the front of the display device), the position of the user who should actually check the protected image is limited, If you need to check, it will inconvenience you.

In addition, since only the background image is displayed in the viewing angle directions other than the designated viewing angle direction, there is a problem that it may cause curiosity of the surrounding people.

(b) is a method of displaying images different from each other in the viewing angle direction designated by each pixel of the pixel group PG with respect to the entire display region of the display panel 110 in the protection mode. That is, a protected image is displayed in a direction of a specified viewing angle, and a separate image is displayed in a direction of a remaining viewing angle.

Therefore, the method of (b) can prevent the curiosity of the surrounding people. In addition, since the image data voltage for the same protection image data or the image data voltage for separately provided image data can be selectively outputted for each pixel of the pixel group PG, Can be expressed. In addition, a plurality of users can simultaneously view protected images in different viewing angles.

However, since (b) must be configured to transmit image data separately for each pixel of the pixel group PG, the data driving circuit 120 processes the image data proportional to the number of pixels as compared with (a) Should be able to do. 1, when the pixel group PG includes three pixels P1 to P3, the data driving circuit 120 of (b) has one pixel group PG for each pixel group PG It is necessary to process three times as much image data as that of (a) which performs image data processing. Therefore, the size of the data driving circuit 120 or the operating speed must be increased.

(c) is a method of displaying images different from each other in the viewing angle direction designated by each pixel of the pixel group (PG) only in a part of the entire display area of the display panel 110 in the protection mode.

Here, some of the areas are protected areas (CAA) that require information protection. In (c), a background image can be displayed for the protection area (CAA) similar to (a) in the viewing angle direction other than the designated viewing angle direction.

That is, in (c), the background image is displayed only for the protection area (CAA), and the same image is displayed for the remaining areas irrespective of the viewing angle direction, making it difficult for the surrounding people to recognize the existence of the protection area. Therefore, it may not cause unnecessary curiosity.

Also, even when a plurality of users use the display device 100 together, a protected image is displayed only to a user in a specific viewing angle direction, and the remaining users can use the existing image. That is, the convenience of each user can be improved while providing an information protection function in an environment where a plurality of users use the display device together.

Particularly in (c), by displaying the background image designated in the protection area CAA in the viewing angle direction other than the designated viewing angle direction, the image to be processed by the data driving circuit 120 The amount of data can be prevented from increasing.

In (a), however, it is not possible to change the viewing angle direction and the background image in which the protected image can be confirmed in the data driving circuit 120, but in (c), it is variable according to the mode control signal con .

The detailed configuration and operation of the controller 140 and the data driving circuit 120 for using the method (c) will be described below.

Figure 5 is a block diagram of the controller of Figure 1;

5, the controller 140 may include a storage and switching unit 510, a mode setting unit 520, a protection area setting unit 530, and a mode control signal setting unit 540.

The storage and switching unit 510 converts the input video data input from the outside (for example, a host device) into a data signal format used by the data driving circuit 120 to generate converted video data (DATA) .

The storage and switching unit 510 may store at least one of the input image data and the converted image data (DATA). The stored input image data or the converted image data (DATA) can be stored as frame data divided into frame units. The storage and switching unit 510 may be divided into a storage unit and a switching unit. When the storage unit and the switching unit are divided, the storage unit may be disposed outside the controller 140.

The mode setting unit 520 sets the normal mode or the protection mode according to the mode information among the mode information and the protection area information input from the outside. Here, the mode information and the protection area information may be received together with the input image data or may be received before the input image data.

The host device (not shown) may transmit the mode information and the protection area information for setting the protection mode and the protection area to the display device 100 according to an executed application or a user command. The protection area information may include viewing angle direction information on a direction in which the protection image is to be displayed.

The mode setting unit 520 may analyze the mode information and set a protection mode for limiting the viewing angle direction of the displayed image according to the analysis result.

The protection area setting unit 530 sets the protection area CAA in the display panel 110 according to the protection area information. Herein, the protection area CAA refers to an area in which a protected image requiring information protection is displayed, as described above.

The protection area setting unit 530 may set the protection area CAA as a partial area in the display area of the display panel 110. However, the entire display area of the display panel 110 may be set as the protection area CAA, . In addition, the protection area setting unit 530 may set a plurality of protection areas (CAA) in the display area.

The mode control signal setting unit 540 generates a mode control signal con for all the pixel groups PG of the display panel 110. [ The mode control signal setting unit 540 sets the mode control signal con for the pixel group PG included in the protection region set in the protection region setting unit 530 to the mode control signal for the remaining pixel groups PG, (con).

The mode control signal setting unit 540 divides the pixel for displaying the protection image and the pixel for displaying the background image out of two or more pixels of the pixel group PG included in the protection area, And generates a control signal con.

On the other hand, the mode control signal setting unit 540 generates the mode control signal con for the remaining pixel group PG so that all the pixels included in the pixel group PG can display the video corresponding to the same video data .

The mode control signal con is a signal for controlling a plurality of switches of the drive switch unit 250 to be described later and may be generated as a signal of a type corresponding to the configuration of the drive switch unit 250. [ Also, the mode control signal con may include background data which is information on a background image to be displayed in the protection area CAA.

The mode control signal setting unit 540 transmits the generated mode control signal con to the data driving circuit 120 together with the converted image data DATA.

6 is a block diagram of the drive switch unit of FIG.

6, the driving switch unit 250 may include a switch control signal generator 610, a background voltage acquiring unit 620, and a switch unit 630.

The switch control signal generator 610 receives the mode control signal con transmitted together with the image data DATA from the controller 140 and analyzes the received mode control signal con to control the switch unit 630, And generates a switch control signal for controlling each of the plurality of switches included in the switch control signal.

Here, the switch control signal generator 610 generates the switch control signal again using the mode control signal con. This is because the data amount of the mode control signal con transmitted from the controller 140 to the data driving circuit 120 . That is, when the mode control signal con is generated as a signal directly controlling a plurality of switches, the amount of data included in the mode control signal con may increase. The switch control signal generator 610 may be composed of a plurality of logic circuit elements that logically combine the mode control signals con to generate switch control signals.

However, when the mode control signal con is generated and applied as a signal directly controlling the switch, the switch control signal generator 610 may be omitted.

The background voltage acquisition unit 620 is a configuration for acquiring a voltage to be applied to a pixel which does not display the protection image in the pixel group PG of the protection area. As above. A pixel which does not display the protection image in the pixel group PG of the protection area expresses the background image.

4A is applied, the background image is not previously changed to a predetermined single color simple image, so that the background voltage acquisition unit 620 can be configured to apply a fixed specific voltage have. However, when the same method as in (c) is applied, the protection area CAA displays images as close as possible to the remaining area in the display area of the display panel 110, thereby reducing the difference between the protection area CAA and the remaining area .

However, in the case where the background image displayed in the protection area CAA is displayed by receiving separate image data from the protected image as shown in FIG. 4B, the data processing amount of the data driving circuit 120 is greatly increased . Accordingly, the background voltage acquisition unit 620 minimizes the increase in data throughput of the data driving circuit 120 by displaying the background image displayed in the protection area CAA as a monochromatic simple image as shown in (a). In addition, in the present invention, the background voltage obtaining unit 620 sets various colors of the background image according to the background data included in the mode control signal con applied from the controller 140, Voltage may be obtained.

Since the color of the background image can be varied, the structure of the background voltage obtaining unit 620 can be more complicated than the case of using the method of (a). However, the same background voltage corresponding to the same background image is output to all the pixel groups PG of the protection area CAA. Therefore, the background voltage obtaining unit 620 can change the color of the background image with the same level of configuration as that for supplying the image data voltage to one pixel. This is a negligible level in view of the operation of the data driving circuit 120 for providing the image data voltage to the plurality of pixels of the display panel 110. [

The switch unit 630 is connected to a corresponding one of the plurality of data lines DL connected to each of the plurality of pixels P1 to P3 at one end, And a plurality of switches connected to one of the background voltages supplied from the background voltage acquisition unit 620.

The plurality of switches of the switch unit 630 select one of the video data voltage or the background voltage in response to the corresponding switch control signal among the switch control signals generated by the switch control signal generator 610, And supplies the applied voltage to each pixel through a data line DL connected at one end.

The plurality of switches of the switch unit 630 selectively supply the image data voltage or the background voltage to each of the pixels P1 to P3 of the pixel group PG in response to the switch control signal.

The switch unit 630 applies a video data voltage to all the pixels except the protection area CAA according to the switch control signal. However, for the protection area CAA, the switch unit 630 applies the image data voltage to the pixel corresponding to the direction of the specified viewing angle according to the switch control signal, while applying the background voltage to the pixel corresponding to the remaining viewing angle direction . Here, the video data voltage is the video data voltage corresponding to the protection video.

Accordingly, the plurality of switches of the switch unit 630 selectively apply the image data voltage or the background voltage through the corresponding data lines DL to the plurality of pixels P1 to P3 included in the protection area CAA according to the switch control signal So that the display apparatus 100 can display the protected image in the specific viewing angle direction with respect to the protection area CAA and display the background image in the remaining viewing angle direction. At this time, the same image is displayed regardless of the viewing angle direction in the remaining areas except for the protection area.

Referring again to FIGS. 1 and 6, the data driving circuit 120 includes a video data switching unit 220 for converting video data into a data voltage, and N (where N is a natural number of 4 or more) And a driving switch unit 250 for outputting the corresponding data voltage for each data line.

The N data lines include two or more first data lines corresponding to two or more adjacent first pixels and two or more second data lines corresponding to two or more adjacent second pixels.

During the protection mode period, the same data voltage may be output to both of the first and second data lines, and the remaining data voltages may be output to at least one of the two or more second data lines.

During the period other than the protection mode period, the same data voltage may be output to both the first and second data lines, and the same data voltage may be output to both the second and third data lines.

Here, during the protection mode period, two or more adjacent second pixels are included in the protection area, and the position and / or the number thereof may be changed according to the setting of the protection area.

Fig. 7 shows an embodiment of the switch unit of Fig. 6, and Fig. 8 shows an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.

7, only the configuration of the switch unit 700 corresponding to one of the pixel groups PG of the plurality of pixel groups PG of the display panel 110 is shown for convenience of explanation, As described in FIGS. 1 and 2, it is assumed that three pixels P1 to P3 are included.

In FIG. 7, only the output buffer for outputting the video data voltage among the various components of the data switching unit 220 is shown for convenience of explanation.

7, the switch unit 700 includes a plurality of second and third switches corresponding to two pixels P2 and P3 among the three pixels P1 to P3 for each of the plurality of pixel groups PG, (SW2, SW3). The second switch SW2 is connected to the data line DL connected to the second pixel P2 and the third switch SW3 is connected to the data line DL connected to the second pixel P2 Lt; / RTI > The second and third switches SW2 and SW3 are connected to the background voltage BGD at the other end in accordance with the second and third switch control signals SWC2 and SWC3, 220, respectively.

Considering the viewing angle direction of each pixel of the pixel group PG described in FIGS. 1 and 2, since the first pixel P1 receives the image data voltage directly from the data switching unit 220 without passing through the switch, The image is displayed on the front surface of the display panel 110. [ That is, the first pixel P1 can not display the background image, and if the pixel group PG is included in the protection area CAA, the protected image is displayed.

On the other hand, the second and third pixels P2 and P3 can receive the image data voltage or the background voltage through the corresponding switches SW2 and SW3.

For example, the second and third switch switches SW2 and SW3 respond to the second and third switch control signals SWC2 and SWC3 of the first level (here, the value of the digital logic 0) to generate the background voltage BGD The second and third pixels P2 and P3. In this case, as shown in (b) of FIG. 8, the display panel 110 displays the background image in the second and third angular ranges other than the first angular range corresponding to the first pixel P1, The image information of the protection area CAA can be protected.

In response to the second and third switch control signals SWC2 and SWC3 of the second level (here, the value of digital logic 1), the second and third switch switches SW2 and SW3 switch the video data voltages to the second and To the third pixels P2 and P3. That is, as shown in FIG. 8 (a), the protected image can also be expressed as a second angular range and a third angular range in addition to the first angular range.

Since the second switch control signal SWC2 and the third switch control signal SWC3 are separately supplied to the second and third switches SW2 and SW3, Protected image and background image) can be displayed.

Although FIG. 7 shows that the second and third switch control signals SWC2 and SWC3 are separately provided, the second and third switch control signals SWC2 and SWC3 are integrated into one non- . In this case, however, the same image is displayed in the second angular range and the third angular range corresponding to the second and third pixels P2 and P3.

9 shows the timing of the mode control signal transmitted to the data driving circuit.

9, each pixel P1 to P3 includes subpixels of three colors (R, G, B), and image data R [7: 0], G [7: 0] B [7: 0]) is assumed to be 8 bits. Accordingly, the controller 140 outputs 24-bit video data R [7: 0], G [7: 0], B [7: 0]). And transmits the 24-bit video data R [7: 0], G [7: 0], and B [7: 0] to the (n + 1) th frame N + 1.

Here, the controller 140 transmits image data for each of a plurality of pixel groups (PG) without transmitting image data for each of a plurality of pixels, as shown in FIG. 4 (c) This is because all the pixels P1 to P3 of the pixel group PG output the same video data if not outputted.

The mode control signal setting unit 540 of the controller 140 further transmits a mode control signal con generated prior to the image data for each pixel group PG. 9, it is assumed that the second and third switch control signals SWC2 and SWC3 are integrated into one switch control signal. Accordingly, even if the mode control signal con is transmitted as 1-bit data, The switch 610 may generate a switch control signal for controlling the second and third switches SW2 and SW3. That is, the controller 140 can control the switches SW2 and SW3 of the switch unit 700 by additionally transmitting only the 1-bit mode control signal con to the video data of each pixel group PG.

Fig. 10 shows another embodiment of the switch unit of Fig. 6, and Figs. 11 and 12 show an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.

10, only the configuration of the switch unit 700 corresponding to one of the pixel groups PG of the plurality of pixel groups PG of the display panel 110 is shown for convenience of explanation, It is assumed that three pixels P1 to P3 are included in the pixel PG. The data switching unit 220 shows only the output buffer.

The switch unit 1000 of FIG. 10 has a configuration in which the first switch SW1 corresponding to the first pixel P1 is added to the switch unit 700 of FIG. The first switch SW1 is connected to the data line DL connected to the first pixel P1 and the other end is connected to the first switch control signal SWC1 in the same manner as the second and third switches SW2 and SW3. And the other end thereof is connected to the background voltage BGD or to the data switching unit 220 where the video data voltage is output.

Therefore, the switch unit 1000 of FIG. 10 can selectively display the protection image or the background image in the first angle range, which is the front face of the display panel 110, in response to the first switch control signal SWC1. Therefore, as shown in FIG. 11, the protection image is displayed in the second and third angular range ranges corresponding to the second and third pixels P2 and P3 in the protection area CAA, while the first angular range A background image can be displayed.

The switch unit 1000 of FIG. 10 includes three switches SW1 to SW3, and the switch control signals SWC1 to SWC3 must be able to control the three switches SW1 to SW3.

When the second and third switch control signals SWC2 and SWC3 are integrated into one switch control signal, the mode control signal setting unit 540 sets the mode control signal con to 2 bits, And the switch control signal generator 610 can control the three switch control signals SWC1 to SWC3 according to the 2-bit mode control signal con.

The switch control signal generator 610 uses the first bit of the mode control signal con as the first switch control signal SWC1 and uses the second bit as the second and third switch control signals SWC2 and SWC3 Can be used.

On the other hand, in most cases, as shown in FIG. 8B, it is general to display the protection image in the first angular range with respect to the protection area CAA and to display the background image in the remaining angular range. However, it may happen that a plurality of users need to confirm the protection image in different view angle directions together. In this case, the switch unit 700 according to FIG. 7 has a problem that the protected image is displayed even if the user is not located in the first angle range of the front surface of the display panel 110. [

In contrast, as shown in FIG. 12, the switch unit 1000 of FIG. 10 can variously adjust the viewing angle direction in which the protected image is displayed and the viewing angle direction in which the background image is displayed. Therefore, even when the position of the user to view the protected image is not the first angle range of the front panel of the display panel, the protected image can be displayed only in the viewing angle direction corresponding to the user's position, thereby enhancing the security. Also, when a plurality of users check the protected images at different positions, the protected images can be displayed as shown in FIGS. 11 and 12A and 12B, thereby improving user convenience.

That is, the protection image or the background image can be selectively displayed for all the angular ranges in which the pixel group PG can display the image, as shown in FIGS. 8 and 11. FIG.

In this case, the second and third switch control signals SWC2 and SWC3 must be able to individually control the second switch SW2 and the third switch SW3, respectively.

For this, a 2-bit mode control signal con may be used. However, by using the 3-bit mode control signal con, each bit of the mode control signal con is directly supplied to the switch control signals SW1 to SW3, .

Fig. 13 shows another embodiment of the switch unit of Fig. 6, and Fig. 14 shows an example of an image displayed along the viewing angle direction in the switch unit structure of Fig.

The switch unit 1300 of FIG. 13 is controlled by the three switch control signals SWC1 to SWC3 in the same manner as the switch unit 1000 of FIG. 10 in the number of the pixels P1 to P3 of the pixel group PG And three switches SW1 to SW3.

However, the switch unit 1300 of FIG. 13 further includes a buffer for buffering and outputting the designated bit (con [0]) of the mode control signal con, and the first switch SW1 has a buffer A data switching unit 220 for outputting a voltage, and a buffer. That is, the first switch SW1 is configured to receive the output of the buffer without receiving the background voltage BGD unlike the second and third switches SW2 and SW3.

Here, the buffer is an analog buffer, and it can output a voltage corresponding to a designated bit (con [0]) of the received mode control signal con in the same manner as the output buffer of the data switching unit 120. Therefore, the first switch SW1 can receive the voltage corresponding to the output of the buffer, that is, the value of the designated bit con [0], of the mode control signal con in response to the first switch control signal SWC1. Here, the output of the buffer may be referred to as a mode voltage. The first switch SW1 controlled by the mode voltage may be referred to as a mode switch.

In this case, the first switch SW1 supplies not only the first switch control signal SWC1 but also a different voltage to the first pixel P1 according to the mode control signal con. Accordingly, the first pixel P1 can display a background image different from the second and third pixels P2 and P3.

For example, the first pixel P1 is connected to the buffer by the first switch control signal SWC1, and when the value of the designated bit (con [0]) of the mode control signal con is 0, . On the other hand, if the value of the designated bit (con [0]) of the mode control signal con is 1, the white image can be displayed.

Table 1 shows the switch control signals SWC1 to SWC3 generated according to the 2-bit mode control signal con with respect to the switch unit 1300 of Fig. 13 and the video signals output from the first to third pixels P1 to P3 .

Table 1 assumes that the second and third switch control signals SWC2 and SWC3 are integrated.

Table 1

In Table 1, the switch control signal generator 610 performs OR operation on each bit of the 2-bit mode control signal con to generate the second and third switch control signals SWC2 and SWC3, And the first switch control signal SWC1 is generated by performing an exclusive OR operation on each bit of the control signal con.

According to Table 1, when each bit of the mode control signal con has a logical value of 0, the first switch SW1 in the switch unit 1000 of Fig. 10 outputs the image data voltage to the first pixel P1 And displays the protected image. On the other hand, the second and third switches SW2 and SW3 supply the background voltage BGD to the second and third pixels P2 and P3, respectively, to display the background image.

When each bit of the mode control signal con has a different logic value of 0 and 1, the second and third switches SW2 and SW3 respectively output the image data voltage DATA to the second and third pixels P2, and P3 to display the protected image. However, the first pixel P1 can display the black image B if the last bit c [0] of the mode control signal con is the logical value 0 and display the white image W if the last bit c [0] .

That is, as shown in FIG. 14, the first pixel P1 can display a white image or a black image different from the background voltage BGD according to the buffer output voltage.

Also, when each bit of the mode control signal con has a logic value of 0, the first to third switches SW1 to SW3 supply the video data voltage to all of the first to third pixels P1 to P3 The protected image can be displayed.

Table 2 shows an example of the switch control signals SWC1 to SWC3 generated according to the 3-bit mode control signal con.

As shown in Table 2, when the switch unit 1300 of FIG. 13 is controlled using the 3-bit mode control signal con, the second and third pixels P2 and P3 individually output the protection image And the first pixel P1 may display one of the protected image, the black image B and the white image W. In this case,

15 is a flowchart of a method of driving a display device according to the present embodiments.

Referring to FIG. 15, in the method of driving the display device according to the present embodiments, the controller 140 first receives the mode information and the protection area information from an external device (for example, a host device) (S1710). Here, the mode information and the protection area information may be received together with the input image data or may be received before the input image data.

The mode setting unit 520 of the controller 140 determines whether the protection mode is set according to the mode information (S1720). If the mode setting unit 520 sets the protection mode according to the mode information, the protection area setting unit 530 sets the protection area CAA in the display panel 110 according to the protection area information (S1730).

At this time, the protection area setting unit 530 may set some or all of the protection area CAA in the display area of the display panel 110 as described above, and may set a plurality of protection areas CAA.

When the protection area CAA is set, the mode control signal setting unit 540 of the controller sets the mode control signal con (S1750). At this time, the mode control signal setting unit 540 sets the mode control signal con for all the pixel groups PG of the display panel 110 but sets the mode control signal Con for the pixel group PG included in the protection region con is set to be different from the mode control signal con for the remaining pixel group PG.

Then, the set mode control signal con is transmitted to the data driving circuit 120 together with the image data whose input image data has been converted.

The driving switch unit 250 of the data driving circuit 120 receives the mode control signal con and analyzes the received mode control signal con to generate a switch control signal S1750.

The driving switch unit 250 including a plurality of switches may control the plurality of switches according to the switch control signal to selectively supply the image data voltage or the background voltage to each of the pixels included in the pixel group PG A data line connected to each of the plurality of switches is driven (S1760).

At this time, the image data voltage and the background voltage are selectively supplied to each pixel of the pixel group PG in the protection area, while only the image data voltage is supplied to each pixel of the pixel group PG not included in the protection area . In other words, for the protection region, the image data voltage and the background voltage are selectively provided to limit the viewing angle direction in which the image according to the image data voltage is expressed, while the image data voltage is supplied to the pixels other than the protection region, Direction to be displayed.

By using the driving method of the display device described above, it is possible to set a protection area requiring information protection, and restrict the viewing angle direction in which the image of the set protection area is displayed. Also, it is possible to set various viewing angle directions in which different images are displayed. In addition, it is possible to display different images according to the viewing angle direction while minimizing hardware complexity.

16 is an illustration of a subpixel structure in the display panel 110 according to embodiments.

16 is a view illustrating a display panel 110 according to an embodiment of the present invention. Each sub-pixel SP includes an organic light emitting diode OLED, A first transistor T1 electrically connected between the first node N1 of the driving transistor DRT and the data line DL and a driving transistor DR2 electrically connected to the driving transistor DRT, And a capacitor Cst electrically connected between the first node N1 and the second node N2 of the driving transistor DRT.

The organic light emitting diode OLED may include a first electrode (e.g., an anode electrode or a cathode electrode), an organic light emitting layer, and a second electrode (e.g., a cathode electrode or an anode electrode).

The first electrode of the organic light emitting diode OLED may be electrically connected to the second node N2 of the driving transistor DRT. A base voltage EVSS may be applied to the second electrode of the organic light emitting diode OLED.

The driving transistor DRT drives the organic light emitting diode OLED by supplying a driving current to the organic light emitting diode OLED.

The driving transistor DRT has a first node N1, a second node N2, and a third node N3.

The first node N1 of the driving transistor DRT is a node corresponding to a gate node and may be electrically connected to a source node or a drain node of the first transistor T1.

The second node N2 of the driving transistor DRT may be electrically connected to the first electrode of the organic light emitting diode OLED and may be a source node or a drain node.

The third node N3 of the driving transistor DRT may be electrically connected to a driving voltage line DVL that supplies a driving voltage EVDD as a node to which the driving voltage EVDD is applied, Node or source node.

The first transistor T1 may be turned on and off by receiving the first scan signal SCAN1 through the gate line to the gate node.

The first transistor T1 is turned on by the first scan signal SCAN1 to transfer the video data voltage Vdata supplied from the data line DL to the first node N1 of the driving transistor DRT I can do it.

Here, when the pixel P including the sub-pixel SP is a pixel selected by the pixel selecting unit 430, the data control unit 440 controls the display control unit 440 so that the transparency of the selected pixel is improved, (Vdata) may be applied to the first node N1 of the driving transistor DRT.

The capacitor Cst is electrically connected between the first node N1 and the second node N2 of the driving transistor DRT and supplies a video data voltage Vdata corresponding to the video data or a voltage corresponding thereto You can keep it for the frame time.

As described above, one subpixel SP illustrated in FIG. 16 is a 2T (Transistor) 1C including two transistors DRT and one capacitor Cst to drive the organic light emitting diode OLED. (Capacitor) structure.

The sub-pixel structure (2T1C structure) illustrated in FIG. 16 is only an example for convenience of explanation, and one sub-pixel SP may further include one or more transistors according to functions, a panel structure, As shown in FIG.

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 220 data switching section
110: display panel 250: drive switch part
120: Data driving circuit
130: Gate drive circuit
140: controller

Claims (20)

A display panel in which a plurality of pixels defined by a plurality of data lines and a plurality of gate lines are arranged and the plurality of pixels form one pixel group by two or more pixels corresponding to two or more different light emission directions;
A controller for setting at least one protection area for distinguishing and displaying an image according to at least two visual directions corresponding to the two or more light emission directions in the display panel and outputting a mode control signal corresponding to the protection area; And
And a data driving circuit for outputting a video data voltage to at least one pixel in each pixel group in the protection area according to the mode control signal and outputting a voltage different from the video data voltage to the remaining pixels. The method according to claim 1,
The data driving circuit includes:
A voltage to be output to each of two or more pixels of the pixel group among the image data voltage and the other voltage according to the mode control signal and transmits the selected voltage through a corresponding one of the plurality of data lines And a driving switch section. The method according to claim 1,
Wherein the image data voltages for two or more pixels of the group of pixels are the same image data voltage. 3. The method of claim 2,
The drive switch unit includes:
A switch control signal generator for generating at least one switch control signal using the mode control signal; And
And a switch unit for selecting one of the image data voltage and the other voltage according to a corresponding switch control signal among the at least one switch control signal and transmitting the same to the corresponding data line. 5. The method of claim 4,
Wherein,
A plurality of switches, one end of which is connected to a data line for a corresponding one of the two or more pixels of the group of pixels and the other end is connected to one of the video data voltage and the other voltage in accordance with the corresponding switch control signal / RTI > 5. The method of claim 4,
The data driving circuit includes:
And a background voltage acquisition unit for converting the predetermined background data into a background voltage that is the other voltage. The method according to claim 6,
The controller comprising:
And sets the background information included in the mode information transmitted together with the designated background information and the input video data as the background data and transmits the background data to the data driving circuit. The method according to claim 1,
The controller comprising:
A mode setting unit for setting a protection mode according to mode information transmitted together with input image data;
A protection area setting unit for setting the protection area according to protection area information transmitted together with the input image data in the protection mode;
And a mode control signal setting unit for setting the mode control signal for the protection area and transmitting the input image data together with the converted image data to the data driving circuit. The method according to claim 1,
The display device includes:
An opening portion which is disposed at a position overlapping with one pixel of the pixel group so as to adjust a viewing angle direction of each of the two or more pixels of the pixel group and is arranged at a position overlapping with the remaining pixels of the pixel group And a barrier disposed on one of a front surface and a back surface of the display panel. A data driver for receiving image data and driving a data line connected to each of pixels of a display panel including a plurality of pixels in which two or more pixels corresponding to two or more different light emitting directions form one pixel group, A video data switching section for switching the video data to the video data; And
At least one pixel group in one or more protection areas set in the display panel for distinguishing and displaying an image according to two or more viewing angle directions corresponding to the two or more light emitting directions according to a mode control signal applied together with the image data, And outputs a voltage different from the video data voltage to the remaining pixels. 11. The method of claim 10,
The drive switch unit includes:
A switch control signal generator for generating at least one switch control signal using the mode control signal; And
And a switch unit for selecting one of the image data voltage and the other voltage according to a corresponding switch control signal among the at least one switch control signal and transmitting the selected image data voltage to a data line connected to a corresponding one of two or more pixels of the pixel group And a data driving circuit. 12. The method of claim 11,
Wherein,
At least one of the image data voltage and the other voltage is output to the remaining pixels except for the first pixel arranged to display the image in the predetermined first light emission direction in the pixel group in response to the at least one switch control signal A data driving circuit comprising one switch. 13. The method of claim 12,
Wherein,
And a mode switch for outputting one of a mode voltage corresponding to the image data voltage or the mode control signal to the first pixel. 12. The method of claim 11,
Wherein,
In response to a first switch control signal of the at least one switch control signal, outputs one of the image data voltage and the other voltage to a first pixel arranged to display an image in a predetermined first light emitting direction in the pixel group A first switch connected to the first switch; And
And at least one second switch for outputting one of the image data voltage and the other voltage to the remaining pixels except for the first pixel in response to a second switch control signal of the at least one switch control signal, in. 12. The method of claim 11,
Wherein,
In response to a first switch control signal of the at least one switch control signal, outputs one of the image data voltage and the other voltage to a first pixel arranged to display an image in a predetermined first light emitting direction in the pixel group A first switch connected to the first switch;
In response to a second switch control signal of the at least one switch control signal, at least one second pixel arranged to display an image in a second light emitting direction that does not overlap with the first light emitting direction, A second switch for outputting one of the other voltages; And
In response to a third switch control signal of the at least one switch control signal, at least one third pixel arranged to display an image in a third light emitting direction that does not overlap with the first and second light emitting directions, And a third switch for outputting one of the voltage and the other voltage. 12. The method of claim 11,
The drive switch unit
And a background voltage acquiring unit for converting the previously set background data into a background voltage that is the other voltage. A driving method of a display apparatus including a display panel including a display panel in which a plurality of pixels constituting one pixel group are formed by two or more pixels corresponding to two or more different light emitting directions,
Receiving mode information and protection area information together with input image data to set a protection mode, a protection area and a mode control signal; And
At least one pixel group in one or more protection areas set in the display panel for distinguishing and displaying an image according to two or more viewing angle directions corresponding to the two or more light emitting directions according to a mode control signal applied together with the image data, Outputting a video data voltage corresponding to the input video data to a pixel of the video data and outputting a voltage different from the video data voltage to the remaining pixels. 18. The method of claim 17,
Wherein the step of outputting the different voltage comprises:
Generating at least one switch control signal using the mode control signal; And
Selecting one of the image data voltage and the other voltage according to a corresponding switch control signal of the at least one switch control signal and transferring the image data voltage and the other voltage to a data line connected to a corresponding one of two or more pixels of the pixel group And a driving method of the display device. A video data switching unit for converting the video data into a data voltage; And
And a drive switch unit for outputting the corresponding data voltage for each of a plurality of data lines,
Wherein the plurality of data lines includes:
Two or more first data lines corresponding to two or more adjacent first pixels and two or more second data lines corresponding to two or more adjacent second pixels,
The same data voltage is output to both the first and second data lines,
Wherein at least one of the two or more second data lines outputs the other data voltages. 20. The method of claim 19,
Wherein at least one of a position and a number of the at least two second pixels is variable.

Images