KR20170110188A - Display device and method of driving the same - Google Patents

Abstract

A display device includes: a display panel having pixels; A control unit for determining a scanning direction based on moving direction information of the display panel provided from an external device; And a scan driver for supplying a horizontal scan signal or a vertical scan signal to the pixel based on the scan direction.

Description

DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device included in a head fire display system and a driving method of the display device.

A head mounted display (HMD) is mounted on the head (or the head of a user) to provide images directly in front of the user's eyes.

The head mounted display device can provide a virtual reality (VR) to the user by displaying an image corresponding to the movement of the user (e.g., rotation and movement of the user's head). However, the image corresponding to the movement of the user may not be accurately displayed according to the response speed (or the delay time for data update) of the head mounted display device.

An object of the present invention is to provide a display device capable of accurately displaying an image corresponding to a motion of a user.

Another object of the present invention is to provide a display device capable of reducing the delay time for data update.

It is still another object of the present invention to provide a method of driving the display device.

In order to accomplish one object of the present invention, a display device according to embodiments of the present invention includes: a display panel having pixels; A control unit for determining a scanning direction based on moving direction information of the display panel provided from an external device; And a scan driver for supplying a horizontal scan signal or a vertical scan signal to the pixel based on the scan direction.

According to an embodiment, the scan driver may include: a first scan driver unit for generating the horizontal scan signal; And a second scan driving unit for generating the vertical scanning signal.

According to one embodiment, the display panel includes a horizontal scanning line extending along a first direction and a vertical scanning line extending along a second direction perpendicular to the first direction, and the pixel is connected to the horizontal scanning line and the vertical scanning line Wherein the first scan driving unit supplies the horizontal scanning signal to the pixel through the horizontal scanning line and the second scan driving unit supplies the vertical scanning signal to the pixel through the vertical scanning line have.

According to an embodiment, the controller selects one of the reference scan directions so that a vector sum between a first unit vector for the moving direction and a second unit vector for the scanning direction is minimized, The second scanning direction being opposite to the first scanning direction, the third scanning direction being perpendicular to the first scanning direction, and the fourth scanning direction being opposite to the third scanning direction and being perpendicular to the second scanning direction, And may include a scanning direction.

According to an embodiment, the control unit may select the first scanning direction from among the reference scanning directions when the moving direction is the first movement direction, and the scan driving unit may use the first scan driving unit The horizontal scanning signal can be sequentially generated.

According to an embodiment, the control unit selects the second scanning direction among the reference scanning directions when the moving direction is a second moving direction opposite to the first moving direction, The horizontal scanning signal can be generated in reverse order using the first scan driving unit.

According to an embodiment, the controller selects the third scanning direction among the reference scanning directions when the moving direction is a third moving direction perpendicular to the first moving direction, The vertical scanning signal can be sequentially generated using the second scan driving unit.

According to an embodiment, the display apparatus further includes a data driver for providing the data voltage to the pixel through a vertical data line or a horizontal data line based on the scanning direction, wherein the vertical data line and the horizontal data line Is included in the display panel, the vertical data line extends along the second direction, and the horizontal data line extends along the first direction.

According to one embodiment, the pixel includes a light emitting element; A driving transistor for transmitting a driving current to the light emitting element based on a first node voltage of the first node; A first control unit for transmitting the data voltage to the first node based on the horizontal scanning signal; And a second control unit for transmitting the data voltage to the first node based on the vertical scanning signal.

According to one embodiment, the pixel includes a light emitting element; A first driving transistor for transmitting a driving current to the light emitting element based on a first node voltage of the first node; A second driving transistor for transmitting the driving current to the light emitting element based on a third node voltage of the third node; A first control unit for transmitting the data voltage to the first node based on the horizontal scanning signal; And a second control unit for transmitting the data voltage to the third node based on the vertical scanning signal.

According to another aspect of the present invention, there is provided a display device including: a display panel divided into a plurality of blocks; A control unit for determining a scanning direction based on moving direction information of the display panel provided from an external device; And scan drivers corresponding to the plurality of blocks, and each of the scan drivers may provide a horizontal scan signal or a vertical scan signal to the display panel based on the scan direction.

According to an embodiment, each of the scan drivers includes: a first scan driver unit for generating the horizontal scan signals; And a second scan driving unit for generating the vertical scanning signal.

According to an embodiment, the control unit determines the scanning direction in a direction opposite to the moving direction, and when the moving direction is the first moving direction, each of the scan driving units uses the first scanning driving unit, Wherein the scan driver sequentially generates the horizontal scanning signal and the vertical scanning signal sequentially using the second scan driving unit when the moving direction is a third moving direction perpendicular to the first moving direction, Can be generated.

According to an embodiment, when the moving direction is a second moving direction opposite to the first moving direction, each of the scan driving units may generate the horizontal scanning signal in reverse order using the first scanning driving unit have.

According to an embodiment, when the moving direction is the fourth moving direction opposite to the third moving direction, each of the scan driving units may generate the horizontal scanning signal in reverse order using the first scanning driving unit have.

According to another aspect of the present invention, there is provided a method of driving a display device, including: driving a display device including pixels; The method of driving the display device includes sensing a moving direction of the display device; Determining a scanning direction based on the moving direction of the display device; And providing a horizontal scanning signal or a vertical scanning signal to the pixel based on the scanning direction.

According to an embodiment, the step of determining the scanning direction may include selecting one of the reference scanning directions so that a vector sum between a first unit vector with respect to the moving direction and a second unit vector with respect to the scanning direction is minimized Wherein the reference scanning directions are opposite to the first scanning direction, the second scanning direction opposite to the first scanning direction, the third scanning direction perpendicular to the first scanning direction, and the third scanning direction, And a fourth scanning direction perpendicular to the second scanning direction.

According to an embodiment, the step of determining the scanning direction may further comprise updating the data signal based on the selected one of the reference scanning directions.

According to an embodiment of the present invention, the step of providing a horizontal scanning signal or a vertical scanning signal to the pixel may include sequentially providing the horizontal scanning signal to the pixel when the first scanning direction is selected.

According to an embodiment, providing the horizontal scanning signal or the vertical scanning signal to the pixel may include sequentially providing the vertical scanning signal to the pixel when the third scanning direction is selected.

The display device according to the embodiments of the present invention determines the scanning direction based on the moving direction information (for example, the direction information about the rotation / movement of the user's head or the direction of the user's line of sight) By updating the data (or the image data), the image corresponding to the user's motion (or the image corresponding to the area in which the user is interested) can be accurately displayed.

In addition, the display device according to the embodiments of the present invention divides a display panel into a plurality of blocks (or a plurality of display areas, a plurality of sub display panels), and independently updates data for each block , The delay time for data update can be further shortened.

Furthermore, the driving method of the display device according to the embodiments of the present invention can more efficiently drive the display device.

However, the effects of the present invention are not limited to the above effects, and may be variously extended without departing from the spirit and scope of the present invention.

1 is a block diagram showing a display device according to embodiments of the present invention.
2A is a diagram showing a comparative example of pixels included in the display device of FIG.
2B is a diagram showing an example of a pixel included in the display device of FIG.
2C is a diagram showing another example of a pixel included in the display device of FIG.
FIGS. 3 and 4 are views for explaining the operation of the display device of FIG. 1 according to the moving direction information.
5 is a view showing an example of a head mounted display apparatus to which the display apparatus of FIG. 1 is applied.
6A is a view showing an example of a display panel included in the head mounted display device of FIG.
6B is a view for explaining the operation of the display panel of FIG. 6A.
7A is a view showing another example of a display panel included in the head mounted display apparatus of FIG.
Fig. 7B is a view for explaining the operation of the display panel of Fig. 7A.
8 is a view showing another example of a display panel included in the head mounted display device of FIG.
9 is a flowchart showing a method of driving a display device according to embodiments of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same or similar reference numerals are used for the same components in the drawings.

1 is a block diagram showing a display device according to embodiments of the present invention.

Referring to FIG. 1, the display device 100 may include a display panel 110, a scan driver 120, a data driver 130, and a timing controller 140 (or a controller). The display apparatus 100 can output an image based on image data (for example, first data (DATA1)) provided from the outside. For example, the display apparatus 100 may be an organic light emitting display.

The display panel 110 may include scan lines S1 to Sn, SV1 to SVm, data lines D1 to Dm, DH1 to DHn, and a pixel PX (where n and m are each 2 or more essence). Here, the scan lines S1 to Sn, SV1 to SVm may include the horizontal scan lines S1 to Sn and the vertical scan lines SV1 to SVm. The horizontal scan lines S1 to Sn may extend in the first direction and may be disposed apart from each other in the second direction perpendicular to the first direction. The vertical scanning lines SV1 to SVm extend in the second direction and may be disposed apart from each other in the first direction.

Similarly, the data lines D1 to Dm, DH1 to DHn may include the vertical data lines D1 to Dm and the horizontal data lines DH1 to DHn. The vertical data lines D1 to Dm extend in the second direction and may be disposed apart from each other in the first direction. The horizontal data lines DH1 to DHn may extend in the first direction and may be disposed apart from each other in the second direction perpendicular to the first direction.

The pixel PX may be arranged in the intersection region of the scan lines S1 to Sn, SV1 to SVm and the data lines D1 to Dm and DH1 to DHn. The pixel PX is provided through the data signal (i.e., the data lines D1 to Dm, DH1 to DHn) in response to a scan signal (i.e., a scan signal supplied through the scan lines S1 to Sn, SV1 to SVm) , And emits light based on the stored data signal.

The scan driver 120 may generate a scan signal based on the scan drive control signal SCS. The scan driving control signal SCS may be provided from the timing controller 150 to the scan driver 120. [ The scan driving control signal SCS includes start pulses and clock signals, and the scan driver 120 includes a shift register that sequentially generates scan signals based on start pulses and clock signals.

In embodiments, the scan driver 120 may include a first scan driver 121 (or a first scan driver) and a second scan driver 122 (or a second scan driver).

The first scan driver 121 may generate the horizontal scanning signals sequentially / inversely. For example, the first scan driver 121 may generate a first horizontal scan signal by shifting the start pulse, and may provide a first horizontal scan signal to the pixel PX through the first horizontal scan line S1 . The first scan driver 121 may shift the first horizontal scan signal to generate a second horizontal scan signal and provide the second horizontal scan signal to the pixel PX through the second horizontal scan line S2. have. That is, the first scan driver 121 sequentially generates the horizontal scan signals and sequentially outputs the horizontal scan signals to the display panel 110 (for example, the first horizontal scan line S1, the second horizontal scan line S2 ) And the n < th > horizontal scanning line Sn).

For example, the first scan driver 121 may shift the start pulse to generate the nth horizontal scanning signal, and may provide the nth horizontal scanning signal to the pixel PX through the nth horizontal scanning line Sn. have. The first scan driver 121 shifts the n-th horizontal scanning signal to generate an (n-1) -th horizontal scanning signal and supplies the (n-1) -th horizontal scanning signal to the pixel PX . That is, the first scan driver 121 generates the horizontal scan signals in a reverse sequence and applies the horizontal scan signals to the display panel 110 in a reverse sequential manner (for example, the nth horizontal scan line Sn, (S2) and the first horizontal scanning line S1).

The second scan driver 122 may generate the vertical scanning signals sequentially / inversely. Similar to the first scan driver 121, the second scan driver 121 sequentially generates vertical scan signals and sequentially outputs the vertical scan signals to the display panel 110 (for example, the first vertical scan line The first vertical scanning line SV1, the second vertical scanning line SV2, and the m vertical scanning line SVm), or in reverse sequential order (for example, the mth vertical scanning line SVm, the second vertical scanning line SV2, (SV1)).

In embodiments, the scan driver 120 may provide a horizontal scanning signal or a vertical scanning signal to the pixel PX based on the scanning direction. Here, the scanning direction is based on the moving direction information of the display device 100 provided from an external device (for example, a gyro sensor) (or information on the rotating / moving direction of the user's head, And may be determined (or generated) by the timing control unit 140.

For example, the scan driver 120 may sequentially or horizontally provide the horizontal scanning signals to the pixels PX based on the scanning direction. In addition, the scan driver 121 can sequentially or vertically provide the vertical scanning signals to the pixels PX based on the scanning direction. The data driver 130 may generate a data signal in response to the data driving control signal DCS. Here, the data driving control signal DCS may be provided from the timing controller 140 to the data driver 130. The data driver 130 may convert the digital image data (for example, the second data DATA2) into analog data signals. The data driver 130 generates a digital signal based on a predetermined gradation voltage (or a gamma voltage), and the gradation voltage may be supplied to the data driver 130 from a gamma circuit (not shown). The data driver 130 may sequentially provide the data signals to the pixels included in the pixel columns.

The data driver 130 may include a first data driver 131 (or a first data driver) and a second data driver 132 (or a second data driver).

The first data driver 131 may generate the first data signal and may provide the first data signal to the pixel PX through the vertical data lines D1 to Dm. Here, the first data signal may include data voltages generated in parallel corresponding to the vertical data lines D1 to Dm (e.g., the second data (DATA2)). The second data driver 132 may generate the second data signal and may provide the second data signal to the pixel PX through the horizontal data lines DH1 to DHn. Here, the second data signal may include data voltages generated in parallel corresponding to the horizontal data lines DH1 to DHn, e.g., the second data (DATA2).

The data driver 130 supplies a data signal (or a data voltage) to the pixel PX through the vertical data lines D1 to Dm or the horizontal scanning lines DH1 to DHn based on the scanning direction can do.

The first data driver 131 may be integrated with the first scan driver 121 and the first data driver 131 may operate together with the first scan driver 121. For example, the first driving integrated circuit includes a first scan driving unit 121 and a first data driving unit 131, and the first driving integrated circuit outputs a horizontal scanning signal and a first data signal (or a data voltage) To the pixel PX. In this case, the pixel PX stores the first data signal in response to the horizontal scanning signal, and can emit light based on the first data signal.

Similarly, the second data driver 132 may be integrated with the second scan driver 122, and the second data driver 132 may operate together with the second scan driver 122. For example, the second driving integrated circuit includes a second scan driving unit 122 and a second data driving unit 132, and the second driving integrated circuit includes a vertical scanning signal and a second data signal (or a data voltage) To the pixel PX. In this case, the pixel PX stores the second data signal in response to the vertical scanning signal, and can emit light based on the second data signal.

The operation of the scan driver 120, the operation of the data driver 130, and the operation of the pixel PX will be described in detail with reference to FIGS.

The timing controller 140 receives image data (e.g., first data DATA1) and input control signals (e.g., a horizontal synchronization signal, a vertical synchronization signal, and clock signals) from an external device, (E.g., second data (DATA2)) suitable for displaying the image of the panel 110. [0064] In addition, the timing controller 140 may control the scan driver 120 and the data driver 130. The timing controller 140 may generate the scan driving control signal SCS and the data driving control signal DCS based on the input control signals.

In the embodiments, the timing controller 140 controls the moving direction information of the display device 100 (or the display panel 110) from the external device (for example, the gyro sensor) Direction), and can determine the scanning direction based on the moving direction information. For example, the timing controller 140 can determine the scanning direction as one of the four directions of up / down / left / right based on the moving direction information of the display device 100. [

On the other hand, the timing control unit 140 can generate the scan driving control signal SCS and the data driving control signal DCS based on the scanning direction. For example, the timing controller 140 may control a first horizontal scanning drive control signal for driving the first scan driver 121 in the forward direction (for example, to sequentially generate a horizontal scanning signal) A first data driving control signal for driving the data driver 131 is generated. For example, the timing controller 140 may control the fourth scan driving control signal and the second scan driving control signal to drive the second scan driver 122 in the reverse direction (for example, to control to generate the vertical scan signals in reverse order) A second data driving control signal for driving the driving unit 132 can be generated.

Meanwhile, the display device 100 may further include a power supply unit (not shown). The power supply unit can generate the driving voltage and supply the driving voltage to the display panel 110 (or the pixel PX). Here, the driving voltage is a power supply voltage necessary for driving the pixel PX. For example, the driving voltage may include a first power supply voltage ELVDD and a second power supply voltage ELVSS. Here, the first power supply voltage ELVDD may be greater than the second power supply voltage ELVSS.

As described above, the display device 100 determines the scanning direction based on the moving direction information of the display device 100 provided from an external device (for example, a gyro sensor), and based on the scanning direction, 110) (or the pixel PX) sequentially or vertically. Accordingly, the display apparatus 100 can accurately display an image corresponding to the movement of the user.

For reference, when a user wears the display device 100 (or a head-mounted display device) and moves an object in the virtual space displayed through the display device 100 from the left direction to the right direction with respect to the user's gaze axis, The user can rotate the head of the user from the left direction to the right direction corresponding to the movement of the object. A display device driven with a predetermined scanning direction (or a fixed scanning direction, for example, a scanning direction from the upper left to the lower right of the display panel) sequentially updates data in a predetermined scanning direction, Objects located on the right side of the panel (or moving from the right side) can be displayed last even within the same frame. Therefore, the display device can display an object with a delay time (i.e., a certain amount of latency) than an instant when an object is located at a specific point. That is, the display device may not accurately display an image including an object. On the other hand, in the display device 100 according to the embodiments of the present invention, the scanning direction is determined from the right side to the left side of the display panel 110 corresponding to the moving direction of the user's head, The object can be displayed without a delay time.

That is, the display device 100 according to the embodiments of the present invention updates the data sequentially from a specific area in which the user is interested, thereby accurately displaying an image of interest to the user without delay.

FIG. 2A is a view showing a comparative example of pixels included in the display device of FIG. 1, and FIG. 2B is a view showing an example of pixels included in the display device of FIG. 2C is a diagram showing another example of the pixels included in the display device of FIG.

Referring to FIGS. 1 and 2A, the first pixel 210 may include a light emitting device EL, a first transistor M1, a second transistor M2, and a first capacitor C1.

The light emitting element EL is connected between the second node N2 and the second power supply voltage ELVSS and can emit light based on the driving current transmitted through the second node N2.

The first transistor M1 (or the driving transistor) is connected between the first power supply voltage ELVDD and the second node N2 and supplies the driving current to the first node N1 based on the first node voltage of the first node N1. 1 power source voltage ELVDD to the second node N2.

The second transistor M2 (or the switching transistor) is connected between the j-th vertical data line Dj and the first node N1, and in response to a scan signal supplied through the i- j vertical data line Dj to the first node N1. Here, the i-th horizontal scanning line Sj is a scanning line corresponding to the first pixel 210 among the horizontal scanning lines S1 to Sn shown in Fig. 1, and the j-th vertical data line Dj is a scanning line corresponding to the And may be a scanning line corresponding to the first pixel 210 among the vertical data lines D1 to Dm.

The first capacitor C1 (or the storage capacitor) is connected between the first node N1 and the second node N2 and can temporarily store a data voltage transmitted through the second transistor M2.

That is, the first pixel 210 is transmitted through the j-th vertical scanning line Dj in response to a scanning signal (or a horizontal scanning signal described with reference to Fig. 1) transmitted through the i-th horizontal scanning line Si It is possible to temporarily store the data voltage and emit light in response to the data voltage (or the first data voltage described with reference to Fig. 1).

Referring to FIGS. 1, 2A and 2B, a second pixel 220 included in the display device 100 is similar to the first pixel 210 described with reference to FIG. 2A, but includes a third transistor M3 .

The third transistor M3 (or the second switching transistor) is connected between the i-th horizontal data line DHi and the first node N1, and the scan signal supplied through the j-th vertical scan line SVj , A vertical scanning signal) to the first node N1 via the i-th horizontal data line DHi. 1, the j th vertical scanning line SVj is a scanning line corresponding to the second pixel 220 among the vertical scanning lines SV1 to SVm shown in Fig. 1, and the i th horizontal data line Di is a And may be a scanning line corresponding to the second pixel 220 among the horizontal data lines DH1 to DHn.

That is, the second pixel 220 outputs a second data voltage (i. E., See FIG. 1) that is transmitted through the i-th horizontal scanning line DHj in response to a vertical scanning signal transmitted through the j-th vertical scanning line SVj Described second data voltage) and emits light in response to the second data voltage. Similarly to the first pixel 210, the second pixel 220 includes a first pixel 210 and a second pixel 220. The second pixel 220 includes a first pixel 210, 1 data voltage temporarily, and can emit light in response to the first data voltage.

Since the display device 100 according to the embodiments of the present invention includes the second pixel 220, an image can be displayed with various scanning directions.

Referring to FIGS. 1, 2A and 2C, the third pixel 230 is similar to the first pixel 210 described with reference to FIG. 2A, but includes a fourth transistor M4, a fifth transistor M5, 2 < / RTI > capacitor C2.

The fourth transistor M4 (or the second driving transistor) is connected between the first power supply voltage ELVDD and the second node N2 and the third node N3, similar to the first transistor M1, In response to the third node voltage of the second node N2, the driving current from the first power supply voltage ELVDD to the second node N2.

The fifth transistor M5 (or the second switching transistor) is connected between the i-th horizontal data line DHi and the third node N3, and the scan signal supplied through the j-th vertical scan line SVj , A vertical scanning signal) to the third node N3 via the i-th horizontal data line DHi.

Similarly to the second pixel 220, the third pixel 230 includes a first pixel 230 and a second pixel 230. The third pixel 230 includes a first pixel 230 and a second pixel 230, 2 data voltage temporarily, and emit light in response to the second data voltage.

Since the display device 100 according to the embodiments of the present invention includes the third pixel 230, an image can be displayed with various scanning directions.

FIGS. 3 and 4 are views for explaining the operation of the display device of FIG. 1 according to the moving direction information.

The display device 100 can determine the operation mode (or select one of the operation modes) based on the movement direction, and can update the data based on the operation mode. Here, the moving direction may be a moving direction of the user, a rotating direction of the user's head, a moving direction of the display device, or the like.

The operating modes are set corresponding to the moving direction and can have different scanning directions. As shown in Fig. 3, the first operation mode may have the first scanning direction SD1 corresponding to the first movement direction D1. The second operation mode may have a second scanning direction SD2 corresponding to the second movement direction D2 and the second scanning direction SD2 may be opposite to the first scanning direction SD1. The third operation mode may have a third scan direction SD3 corresponding to the third movement direction D3 and the third scan direction may be perpendicular to the first scan direction SD1. The fourth operation mode has the fourth scan direction SD4 corresponding to the fourth movement direction D4 and the fourth scan direction SD4 is opposite to the third scan direction SD3 and the second scan direction SD2, Lt; / RTI >

In one embodiment, when the movement direction is the first movement direction D1, the display device 100 (or the timing control unit 140) can select the first one of the operation modes. In this case, the display apparatus 100 supplies the data signal (or the data voltage) to the pixel PX using the first data driver 131 and supplies the horizontal scanning signal to the pixel PX using the first scan driver 121 And sequentially supply the horizontal scanning signals to the display panel 110. [ Therefore, the data (or image) corresponding to the upper end (or the upper left end, the first moving direction D1) of the display panel 110 can be updated most quickly in one frame.

For reference, when the moving direction is the first moving direction D1, the display device 100 judges that the user is interested in a specific object (or part of the image) located in the first moving direction D1 , And the image corresponding to the first movement direction D1 (or the upper end of the display panel 110) can be displayed preferentially (or without a delay time) through the first operation mode.

In one embodiment, when the movement direction is the second movement direction D2, the display device 100 (or the timing control unit 140) can select the second one of the operation modes. In this case, the display apparatus 100 supplies the data signal (or the data voltage) to the pixel PX using the first data driver 131 and supplies the horizontal scanning signal to the pixel PX using the first scan driver 121 And supplies the horizontal scanning signals to the display panel 110 in a reverse sequential manner. Therefore, in one frame, the data (or image) corresponding to the lower end (or the upper right end, the second moving direction D2) of the display panel 110 can be updated most quickly.

In one embodiment, when the movement direction is the third movement direction D3, the display device 100 (or the timing control unit 140) can select the third one of the operation modes. In this case, the display apparatus 100 supplies the data signal (or the data voltage) to the pixel PX using the second data driver 132 and supplies the vertical scanning signal to the pixel PX using the second scan driver 132 And sequentially supply the vertical scanning signals to the display panel 110. [ Therefore, in one frame, the data (or image) corresponding to the left side (or the lower left end, the third moving direction D3) of the display panel 110 can be updated most quickly.

In one embodiment, when the movement direction is the fourth movement direction D4, the display device 100 (or the timing control unit 140) can select the fourth operation mode out of the operation modes. In this case, the display apparatus 100 supplies the data signal (or the data voltage) to the pixel PX using the second data driver 132 and supplies the vertical scanning signal to the pixel PX using the second scan driver 132 And sequentially supplies the vertical scanning signals to the display panel 110. [0050] FIG. Therefore, the data (or image) corresponding to the right side of the display panel 110 (or the right upper end and the fourth moving direction D4) in one frame can be updated most quickly.

In one embodiment, when the display device 100 (or the user) does not move (or rotate), the display device 100 (or the timing controller 140) can select one of the operation modes . For example, the display apparatus 100 can select the first operation mode. In this case, as described above, the display apparatus 100 supplies the data signal (or the data voltage) to the pixel PX using the first data driver 131, and uses the first scan driver 121 And sequentially supplies the horizontal scanning signals to the display panel 110. [0050] FIG.

On the other hand, the actual movement direction may not exactly correspond to one of the up / down / left / right directions. In this case, the display device 100 can determine the operation mode by using the direction vector in the actual movement direction or the main direction component in the actual movement direction.

In the embodiments, the display apparatus 100 determines (or selects) the operation mode (or the scanning direction) so that the vector sum between the first unit vector with respect to the moving direction and the second unit vector with respect to the scanning direction becomes minimum, can do. For example, the display device 100 calculates vector sum between the first unit vector for the moving direction and the reference scanning directions (e.g., first through fourth scanning directions SD1 through SD4) The scanning direction corresponding to the smallest value among the vector sums can be selected.

In the embodiments, the display apparatus 100 can extract the main movement direction (or the main direction component) with respect to the movement direction, and determine (or select) the operation mode corresponding to the main movement direction. For example, the display apparatus 100 determines (or extracts) the main moving direction having the largest value by expressing the moving direction by a combination of the four moving directions D1 to D4, It is possible to determine the scanning direction.

3 or 4, the display device 100 (or the timing controller 140) determines the operation mode (or the scanning direction) based on the moving direction, Direction) of the data. Accordingly, it is possible to accurately display a part (or an object) of an image that the user is interested in without delay time.

3 and 4, the display apparatus 100 is described as including four operation modes, but the display apparatus 100 is not limited thereto. For example, the display apparatus 100 includes a plurality of display panels, a plurality of scan drivers and a plurality of data drivers corresponding to the plurality of display panels, and includes five or more operation modes set by combining the four operation modes described above .

5 is a view showing an example of a head mounted display apparatus to which the display apparatus of FIG. 1 is applied.

Referring to FIG. 5, the head mounted display 500 (or the head mounted display system) may include a display panel 510 and a lens 520. The head mounted display device 500 may further include a frame (or a case) which is worn on the head portion of the user and supports the display panel 510 and the lens 520. The display panel 100 and the lens 20 can be spaced apart with a certain distance.

The lens 520 directly provides an image displayed on the display panel 510 to the user's eye when the head-mounted display device 500 is worn by the user, and the lens 520, for example, Lt; / RTI > Although not shown in FIG. 5, the head mounted display device 500 further includes lenses, reflectors, and optical elements for forming and adjusting an optical path such that the image displayed on the display panel 510 is scanned by both eyes of the user .

The display panel 510 (and the head-mounted display device 500) may be substantially the same as the display panel 110 (and the display device 100) described above with reference to Fig. Therefore, redundant description is not repeated.

On the other hand, the head-mounted display apparatus 500 may further include a gyro sensor (not shown). The gyro sensor may sense the direction of movement of the user (or movement / rotation of the user's head). The head mounted display apparatus 500 can determine the scanning direction (for example, the updating direction of the image on the display panel 510) based on the moving direction detected by the gyro sensor.

In the embodiments, the head mounted display device 500 may further include a visual line sensing device (not shown). The line of sight sensing device can sense the direction of the user's line of sight. In this case, the head mounted display apparatus 500 can determine the scanning direction based on the user's gaze direction instead of the user's moving direction.

FIG. 6A is a view showing an example of a display panel included in the head mounted display device of FIG. 5, and FIG. 6B is a view for explaining the operation of the display panel of FIG. 6A.

Referring to FIG. 6A, the display panel 510 may include a first display region 610 and a second display region 620. The first display area 610 displays a first image (e.g., the left image) for one of the user's eyes (e.g., the left eye of the user) (E.g., the right image) for the other one of the eyes of the user (e.g., the right eye of the user). The first display area 610 may be physically separated from the second display area 620. That is, the display panel 510 may include two independent sub-display panels.

In this case, the head mounted display apparatus 500 may include a first driver for the first display region 610 and a second driver for the second display region 620. Each of the first and second driver units may include the scan driver 120 and the data driver 130 described with reference to FIG.

The head mounted display device 500 determines an operation mode (for example, one of the operation modes described above with reference to FIG. 3) based on the movement direction sensed by the gyro sensor, and based on the operation mode, The image can be displayed on the first display area 610 and the second display area 620 using the driving part and the second driving part. For example, as described above with reference to FIG. 3, the head-mounted display apparatus 500 can display the first operation mode (or the first operation direction SD1 ), Updates the data (or the first image) on the first display area 610 in the first scanning direction SD1 by using the first driving part, and updates the data (or the first image) The data (or the second image) on the area 620 can be updated in the first scanning direction SD1.

Since the head mounted display apparatus 500 drives the first and second display regions 610 and 620 independently of each other, compared with the display apparatus including only one display region (or one display panel) The time (or delay time) can be reduced.

Referring to FIG. 6B, the display device according to the comparative example includes only one display panel, and the head mounted display device 500 (or the display device 100) according to the embodiments of the present invention includes first and / And may include two display panels corresponding to the second display areas 610 and 620.

For example, it can be assumed that the display panel includes four pixels by line (or line by line). In this case, the display device according to the comparative example may require four reference times to update the data for the first to fourth pixels every frame. On the other hand, the head mounted display 500 may require only two reference times to update data for the first through fourth pixels. That is, the head-mounted display apparatus 500 can display the first display region 610 and the second display region 610 for the pixels included in the first display region 610 (e.g., the first and second pixels) The data for the pixels included in the second display area 620 (for example, the third and fourth pixels) can be updated using the second driving unit at the same time.

That is, the head mounted display device 500 divides the display panel 510 into the first display area 610 and the second display area 620, and independently updates the data for each display area, It is possible to shorten the total time (or the delay time at the time of data update) and accurately display the image corresponding to the user's motion.

FIG. 7A is a view showing another example of the display panel included in the head mounted display device of FIG. 5, and FIG. 7B is a view illustrating the operation of the display panel of FIG. 7A.

Referring to FIGS. 1, 6A and 7A, the display panel 700 may include first through fourth sub-display panels 710 through 740. The display panel 700 is divided into four blocks based on a specific interval (or the same width), and the first to fourth sub display panels 710 to 740 may correspond to four blocks, respectively. The first to fourth sub-display panels 710 to 740 may not overlap with each other.

The first sub display panel 710 and the second sub display panel 720 display the first image (for example, the left image) described with reference to Fig. 6A, and the third sub display panel 730 and the fourth The sub display panel 740 may display the second image (e.g., the left image) described with reference to FIG. 6B.

In this case, the head mounted display apparatus 500 may include first to fourth driving units for the first to fourth sub display panels 710 to 740. Each of the first and fourth drivers may include the scan driver 120 and the data driver 130 described with reference to FIG.

The head mounted display apparatus 500 including the display panel 700 determines the operation mode based on the movement direction sensed by the gyro sensor and controls the operation of the first to fourth driving units based on the operation mode, It is possible to display an image on the fourth sub display panels 710 to 740. For example, the head-mounted display apparatus 500 selects the fifth operation mode (or the fifth scan direction SD5), and selects the first operation mode (or the fifth scan direction SD5) using the first to fourth drive units based on the fifth operation mode To the fourth sub-display panels 710 to 740, respectively. Here, the fifth operation mode (or the fifth scan direction SD5) is substantially the same as or similar to the first operation mode (or the first scan direction SD5) described with reference to Figs. 3 and 4 .

Referring to FIG. 7B, the display device according to the comparative example includes only one display panel, and the head mounted display device 500 (or the display device 100) according to the embodiments of the present invention includes first to And fourth sub-display panels 710 to 740.

As described with reference to Fig. 6B, the display device according to the comparative example may require four reference times to update the data. On the other hand, the head mounted display apparatus 500 may require only one reference time to update the data for the first through fourth pixels. That is, during one reference time, the head-mounted display apparatus 500 updates the data for a pixel (for example, the first pixel) included in the first sub display panel 710 using the first driver, (For example, the second pixel) included in the second sub display panel 720 by using the second driver and is included in the third sub display panel 730 using the third driver (For example, the fourth pixel) included in the fourth sub display panel 740 by using the fourth driving unit, and updates the data for the pixel can do.

That is, the head-mounted display apparatus 500 divides the display panel 700 into four sub-display panels 710 to 740 and independently updates data for each sub-display panel, so that the total time for data update Or the delay time at the time of data update) can be shortened, and an image corresponding to the movement of the user can be accurately displayed.

8 is a view showing another example of a display panel included in the head mounted display device of FIG.

Referring to FIGS. 1, 7A and 8, the display panel 800 may include first through eighth sub display panels 810 through 880. Similar to the display panel 700 described with reference to Fig. 7A, the display panel 800 is divided into eight blocks based on a specific interval (or the same width and the same height), and the first to eighth sub- The panels 810 to 880 may correspond to eight blocks, respectively.

In this case, the head mounted display apparatus 500 may include first to eighth drivers for the first to eighth sub display panels 810 to 880. Each of the first and eighth driving units may include the scan driving unit 120 and the data driving unit 130 described with reference to Fig.

The head mounted display device 500 including the display panel 800 determines an operation mode (e.g., the sixth scanning direction SD6) based on the movement direction sensed by the gyro sensor, And display the images corresponding to the first to eighth sub display panels 810 to 880 using the first to eighth drivers.

The head mounted display apparatus 500 divides the display panel 800 into eight sub display panels 810 to 880 and independently updates data for each sub display panel so that the total time for data update The delay time at the time of data update) can be further shortened and the video corresponding to the user's motion can be accurately displayed.

In the embodiments, the head mounted display device 500 determines the operation mode (or the scanning direction) for each of the sub display panels and displays an image on each of the sub display panels 810 to 880 based on the operation mode can do. For example, the head-mounted display apparatus 500 may display the second scanning direction SD2 (or SD2) among the scanning directions SD1 to SD4 (or reference directions) described with reference to FIG. 3 for the first sub- Selects the third scanning direction SD3 for the second sub display panel 820 and selects the fourth scanning direction SD4 for the third sub display panel 830, The first scanning direction SD1 can be selected for the display panel 840. [ Similarly, the head mounted display 500 selects the second scanning direction SD2 for the fifth sub display panel 850 and the third scanning direction SD3 for the sixth sub display panel 860 And selects the fourth scanning direction SD4 for the seventh sub display panel 870 and the first scanning direction SD1 for the eighth sub display panel 880. [

6A from the center (or the center of the area) of the first display area 610 described above with reference to Fig. 6A, the image (or data, first image) ) ≪ / RTI > Similarly, the image (or the data, the second image) is displayed on the periphery of the second display area 620 from the center (or the center of the area) of the second display area 620 described with reference to FIG. 6A, Edge), in order.

For reference, the display panel 800 displays an image within 94 degrees on the basis of the user's gaze axis (or gaze direction), and the user displays the image of the user You can only be sensitive to images within 20 degrees from the line of sight axis. The head mounted display apparatus 500 according to the embodiments of the present invention updates the first image (e.g., the left eye image) in the order from the center of the first image to the neighboring image, , Images within a range of 20 degrees around the user's visual axis) can be accurately displayed without delay time.

9 is a flowchart showing a method of driving a display device according to embodiments of the present invention.

Referring to Figs. 1, 5 and 9, the method of Fig. 9 can be performed in the display device 100 (or the head mounted display device 500 described with reference to Fig. 5) described with reference to Fig. 1 .

The method of FIG. 9 may sense the direction of movement (S910). 5, the moving direction is the movement / rotation direction of the user, the movement / rotation direction of the head mounted display device 500, or the user's gaze direction, and the method of FIG. 9 is a gyro sensor Or a direction signal (i.e., a direction signal corresponding to the moving direction) from an external device.

The method of FIG. 9 can determine the scanning direction (or the operation mode) based on the moving direction (S920). As described with reference to Fig. 3, the method of Fig. 9 can select one of the first to fourth scanning directions SD1 to SD4 (or the first to fourth operation modes) based on the moving direction . For example, it is possible to select the first scanning direction SD1 (or the first operation mode) corresponding to the first moving direction D1.

The method of FIG. 9 may update the data according to the scanning direction (S930). The method of FIG. 9 provides the data signal (or the data voltage) to the display panel 110 (or the pixel PX) based on the scanning direction, and supplies the scanning signal (the horizontal scanning signal or the vertical scanning Signal) to the display panel 110 (or the pixel PX).

For example, when the first scanning direction SD1 (or the first operation mode) is selected, as described with reference to FIG. 4, the method of FIG. 9 uses the first data driver 131 to drive the display panel (Or data voltage) to the display panel 110 using the first scan driver 121 and sequentially supply the horizontal scan signal to the display panel 110 using the first scan driver 121. [

For example, when the fourth scanning direction SD4 (or the fourth operation mode) is selected, as described with reference to FIG. 4, the method of FIG. 9 uses the second data driver 132 to drive the display panel (Or data voltages) to the display panel 110 using the second scan driver 122 and to provide the vertical scan signals in reverse order to the display panel 110 using the second scan driver 122.

9, the method of FIG. 9 determines the scanning direction (or the operation mode) based on the movement direction (for example, the rotation direction of the user's head) The data can be updated in accordance with the data. Accordingly, it is possible to accurately display a part (or an object) of an image that the user is interested in without delay time.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And may be modified or changed by those skilled in the art.

The display device and the driving method thereof according to embodiments of the present invention can be applied to various display systems. For example, the display device and the driving method thereof may be applied to various types of display devices such as a television, a computer monitor, a laptop, a digital camera, a cellular phone, a smart phone, a PDA, a PMP, an MP3 player, a navigation system, System (VR) or the like.

100: display device 110: display panel
120: scan driver 121: first scan driver
122: second scan driver 130:
131: first data driver 132: second data driver
140: timing control unit 210: first pixel
220: second pixel 230: third pixel
500: head mounted display device 510: display panel
520: lens 610: first display area
620: second display area 700: display panel
710 to 740: First to fourth sub-display panels
810 to 880: First to eighth sub display panels

Claims (20)

A display panel having pixels;
A control unit for determining a scanning direction based on moving direction information of the display panel provided from an external device; And
And a scan driver for supplying a horizontal scanning signal or a vertical scanning signal to the pixel based on the scanning direction. The liquid crystal display according to claim 1,
A first scan driving unit for generating the horizontal scanning signal; And
And a second scan driving unit for generating the vertical scanning signal. The display panel according to claim 2, wherein the display panel includes a horizontal scanning line extending along a first direction and a vertical scanning line extending along a second direction perpendicular to the first direction,
The pixel is connected to the horizontal scanning line and the vertical scanning line,
The first scan driving unit supplies the horizontal scanning signal to the pixel through the horizontal scanning line,
And the second scan driving unit supplies the vertical scanning signal to the pixel through the vertical scanning line. The apparatus of claim 3, wherein the controller selects one of the reference scan directions so that a vector sum between a first unit vector with respect to the moving direction and a second unit vector with respect to the scanning direction becomes minimum,
Wherein the reference scanning directions include a first scanning direction, a second scanning direction opposite to the first scanning direction, a third scanning direction perpendicular to the first scanning direction, and a second scanning direction opposite to the third scanning direction, And a fourth scanning direction perpendicular to the first scanning direction. The apparatus of claim 4, wherein the controller selects the first scan direction from among the reference scan directions when the movement direction is the first movement direction,
Wherein the scan driver sequentially generates the horizontal scanning signals using the first scan driving unit. The apparatus of claim 5, wherein the control unit selects the second scanning direction among the reference scanning directions when the moving direction is the second moving direction opposite to the first moving direction,
Wherein the scan driver generates the horizontal scanning signals in reverse order using the first scan driving unit. The apparatus of claim 5, wherein the controller selects the third scanning direction among the reference scanning directions when the moving direction is a third moving direction perpendicular to the first moving direction,
Wherein the scan driver sequentially generates the vertical scanning signals using the second scan driving unit. The method according to claim 1,
And a data driver for providing the data voltage to the pixel through a vertical data line or a horizontal data line based on the scanning direction,
Wherein the vertical data line and the horizontal data line are included in the display panel,
Wherein the vertical data line extends along the second direction,
And the horizontal data line extends along the first direction. 2. The pixel according to claim 1,
A light emitting element;
A driving transistor for transmitting a driving current to the light emitting element based on a first node voltage of the first node;
A first control unit for transmitting the data voltage to the first node based on the horizontal scanning signal; And
And a second control unit for transmitting the data voltage to the first node based on the vertical scanning signal. 2. The pixel according to claim 1,
A light emitting element;
A first driving transistor for transmitting a driving current to the light emitting element based on a first node voltage of the first node;
A second driving transistor for transmitting the driving current to the light emitting element based on a third node voltage of the third node;
A first control unit for transmitting the data voltage to the first node based on the horizontal scanning signal; And
And a second control unit for transmitting the data voltage to the third node based on the vertical scanning signal. A display panel divided into a plurality of blocks;
A control unit for determining a scanning direction based on moving direction information of the display panel provided from an external device; And
And scan drivers corresponding to the plurality of blocks,
And each of the scan drivers supplies a horizontal scan signal or a vertical scan signal to the display panel based on the scan direction. 12. The liquid crystal display according to claim 11, wherein each of the scan driver
A first scan driving unit for generating the horizontal scanning signal; And
And a second scan driving unit for generating the vertical scanning signal. 13. The apparatus according to claim 12, wherein the controller determines the scanning direction in a direction opposite to the moving direction,
When the moving direction is the first moving direction, each of the scan driving units sequentially generates the horizontal scanning signal using the first scan driving unit,
Wherein each of the scan driver sequentially generates the vertical scan signal using the second scan driving unit when the movement direction is a third movement direction perpendicular to the first movement direction. 14. The method of claim 13, wherein when the moving direction is a second moving direction opposite to the first moving direction, each of the scan driving units generates the horizontal scanning signal in reverse order using the first scanning driving unit . 15. The method according to claim 14, wherein when the moving direction is a fourth moving direction opposite to the third moving direction, each of the scan driving units generates the horizontal scanning signal in reverse order using the first scanning driving unit . In a display device having pixels,
Sensing a moving direction of the display device;
Determining a scanning direction based on the moving direction of the display device; And
And providing a horizontal scanning signal or a vertical scanning signal to the pixel based on the scanning direction. The method as claimed in claim 16, wherein the step of determining the scanning direction includes the step of selecting one of the reference scanning directions so that a vector sum between a first unit vector with respect to the moving direction and a second unit vector with respect to the scanning direction is minimized ≪ / RTI >
Wherein the reference scanning directions include a first scanning direction, a second scanning direction opposite to the first scanning direction, a third scanning direction perpendicular to the first scanning direction, and a second scanning direction opposite to the third scanning direction, And a fourth scanning direction that is perpendicular to the first scanning direction. 18. The method of claim 17, wherein the determining the scanning direction further comprises: updating a data signal based on the selected one of the reference scanning directions. 19. The method of claim 18, wherein providing the horizontal scan signal or the vertical scan signal to the pixel comprises:
And sequentially supplying the horizontal scanning signal to the pixel when the first scanning direction is selected. 20. The method of claim 19, wherein providing the horizontal scan signal or the vertical scan signal to the pixel comprises:
And sequentially supplying the vertical scanning signal to the pixels when the third scanning direction is selected.

Images