KR20180039811A - Organic light emitting display and driving method for the same - Google Patents

Abstract

The present invention relates to an organic light emitting display device and a driving method thereof. According to an embodiment of the present invention, the organic light emitting display device comprises: a display panel which includes multiple pixels receiving data signals while letting driving currents corresponding to the data signals flow there-through, separates pixels in a first group among the multiple pixels as a first block, and separates the pixels in a second group among the multiple pixels as a second block; a data driver outputting the data signals; and a gate driver which outputs gate signals for writing the data signals to the multiple pixels, outputs initialization control signals transmitting an initialization voltage for cutting off the flowing driving currents to the multiple pixels, maintains the initialization control signals for a first section for enabling the pixels of the first block to receive the gate signals in a sequential manner, and maintains the initialization control signals for a second section for enabling the pixels of the second block to receive the gate signals in a sequential manner. The organic light emitting display device can suppress the occurrence of motion blur and prevent degradation in image definition accordingly.

Description

TECHNICAL FIELD [0001] The present invention relates to an organic light emitting diode (OLED) display device,

The present embodiments relate to an organic light emitting display and a driving method thereof.

BACKGROUND ART Demands for a display device for displaying an image have been increasing in various forms as an information society has developed. The demand for display devices such as a liquid crystal display device (LCD), an organic light emitting display device (OLED) Various types of display devices such as a liquid crystal display device and a liquid crystal display device are used. Particularly, since the organic light emitting display device displays an image using an organic light emitting diode, which is a self-light emitting device, it has a fast response speed and wide viewing angle, and is widely used.

Such a display device is driven by an active matrix type so that data written in a section of one frame is maintained to display an image. Such a display device of the active matrix type has a problem in that a motion blur occurs in which a motion of an object displayed on a display device appears as a residual image because a data signal is maintained and displayed during one frame period.

In order to prevent the occurrence of motion blur in a display device of the active matrix type, a method has been devised in which a black image is displayed before a next frame starts after an image is displayed for one frame by using a data signal corresponding to the black image. In particular, a liquid crystal display device can easily insert a black image by turning off a backlight unit to prevent light from emitting light, but a new method of inserting a black image is required because the organic light emitting display device has no backlight unit. In this case, a period in which the data signal corresponding to the black image is written is required, so that the data signal corresponding to the black image and the data signal corresponding to the general image The time for writing the data signal corresponding to the general image can be shortened and the time for writing the data signal may be insufficient when the display device is driven at a high resolution or at a high frequency.

Accordingly, there is a need for a method for preventing the occurrence of motion blur by inserting a section in which a black image is displayed by a new method.

It is an object of the present embodiments to provide an organic light emitting display capable of preventing the occurrence of motion blur and a driving method thereof.

It is another object of the present embodiments to provide a method of driving an organic light emitting display suitable for high resolution and / or high frequency driving.

In one aspect, the present embodiments include a plurality of pixels that receive a data signal and through which a driving current corresponding to a data signal flows, divide a group of pixels of at least a plurality of pixels into a first block, A data driver for outputting a data signal and a gate signal for writing a data signal to a plurality of pixels and a gate signal for writing a reset voltage for interrupting the flow of a driving current to a plurality of pixels The initialization control signal is held in the first block during the first period in which the pixels of the first block are sequentially received and the pixels of the second block sequentially transmit the gate signals And a gate driver for outputting an initialization control signal to be held in a second block during a second period of receiving the organic light emitting display.

According to another aspect of the present invention, there is provided a liquid crystal display device comprising a first section in which a data signal is written and a flow of a driving current corresponding to the data signal is cut off, a second section in which a driving current flows in correspondence with the data signal written in the first section, And a second block including a first group of pixels among the plurality of pixels that are operated in a divided manner and a second block in which the flow of the driving current corresponding to the data signal is written in which the data signal is written, And a second block including a second group of pixels among the plurality of pixels, the third block being divided into a third period in which the driving current flows corresponding to the data signal.

According to another aspect of the present invention, there is provided a method of driving an OLED display in which a display panel is divided into at least a first block and a second block, A second initializing voltage is applied to the second block and a second initializing voltage is applied to the second block in response to the first initializing voltage, And a second step of driving the organic light emitting display device.

According to the embodiments, it is possible to provide an organic light emitting display device and a driving method thereof that can prevent the image quality from being lowered by suppressing the occurrence of motion blur.

In addition, according to the embodiments, there is provided an organic light emitting display device and a driving method thereof that can perform high frequency driving without motion blur when high resolution or high frequency driving is performed.

1 is a structural view showing the structure of an organic light emitting display according to an embodiment of the present invention.
2 is a circuit diagram showing one embodiment of a pixel employed in the organic light emitting display shown in FIG.
3 is a structural view showing an embodiment of a display panel divided into a plurality of blocks.
4 is a structural diagram showing an embodiment of block-by-block display in the display panel shown in Fig.
5 is a waveform diagram showing an embodiment of a waveform of a driving signal for driving the display panel shown in Fig.
6 is a flowchart showing an embodiment of a driving method of the organic light emitting display shown in FIG.

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

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

1 is a structural view showing the structure of an organic light emitting display according to an embodiment of the present invention.

1, an OLED display 100 may include a display panel 110, a data driver 120, a gate driver 130, and a controller 140.

The display panel 110 may include a plurality of pixels 101. The plurality of pixels 101 are defined by the gate lines G1, G2, ..., Gn-1, Gn and the data lines D1, D2, ..., Dm-1, Dm intersecting in the display panel 110 And may be disposed in the pixel region. Further, each pixel 101 may be disposed between a high potential line (VL) for supplying a high potential voltage and a low potential line (not shown) for supplying a low potential voltage. The pixel 101 may be a unit for expressing a specific gradation and color by mixing red, green, blue, and / or white light in the display panel 110. In addition, the pixel 101 may be a unit that emits red, green, blue, or white light in the display panel 110, respectively. Here, the low potential line may be a common electrode commonly connected to each pixel.

In addition, each pixel 101 may include an organic light emitting diode (not shown) and a pixel circuit (not shown) for causing a driving current to flow through the organic light emitting diode. Each pixel 101 is supplied with a gate signal transmitted through gate lines G1, G2, ..., Gn-1, Gn through data lines D1, D2, ..., Dm-1, Dm A data signal is transmitted to each pixel 101. Each pixel 101 generates a driving current corresponding to a data signal in a pixel circuit and flows to the organic light emitting diode so that light is emitted to thereby display the image on the display panel 110 Can be displayed.

In addition, each pixel 101 may be connected to an initialization signal line (Vinit) for transferring the initialization voltage (Vref). Each pixel may be connected to an initialization control line SS1, SS2, ..., SSn-1, SSn that carries an initialization control signal that allows the initialization voltage Vref to be selectively delivered. When the pixel 101 receives the initialization voltage Vref by the initialization control signal, the pixel 101 does not emit the driving current due to the initialization voltage Vref and can not emit light. When the pixel 101 does not emit light, black can be displayed. Therefore, since black is not displayed by using the data signal, there is no need to write a separate black image, so that the time for writing the data signal in the process of high resolution and / or high frequency driving can be insufficient.

The display panel 110 may divide the pixels of the first group among the plurality of pixels into a first block 110a and the pixels of the second group among the plurality of pixels into the second block 110b. After the first block 110a receives the data signal and the initialization voltage Vref, the second block 110b may receive the data signal and the initialization voltage Vref. Therefore, when the pixels of the first group 110a included in the first block 110a represent black by the initialization voltage Vref, the data signals are written to the pixels of the first group, and the initialization voltage Vref, The data signals may be written to the pixels of the second group when the two groups of pixels included in the first group 110b represent black.

The data driver 120 may generate a data signal corresponding to a video signal and transmit the data signal to a plurality of pixels 101 through a plurality of data lines D1, D2, ..., Dm-1, and Dm. Here, the data driver 120 is shown as one component, but the present invention is not limited thereto. The data driver 120 may include two or more data drivers 120 corresponding to the resolution of the display panel 110 and the number of channels of the data driver 120 that outputs the data signals. .

The gate driver 130 may generate a gate signal and sequentially apply a gate signal to the plurality of gate lines G1, G2, ..., Gn-1, Gn. The pixels connected to the gate lines G1, G2, ..., Gn-1 and Gn to which the gate signal is applied receive the data signals transmitted through the data lines D1, D2, ..., Dm-1 and Dm . The gate driver 130 may generate an initialization control signal and may transmit an initialization control signal to a plurality of initialization control signals. However, the present invention is not limited thereto, and the gate driver 130 may determine the number of channels for outputting the initialization control signal corresponding to the number of blocks, (SS1, SS2, ..., Sn-1, SSn) can receive initialization control signals in parallel for each block. For example, if the display panel 110 includes the first block 110a and the second block 110b, the gate driver 130 outputs the initialization control signal, which is outputted in the high state in the first period, An initialization control signal outputted in a high state is outputted through two channels and an initialization control signal line connected to pixels arranged in a first block is transmitted in parallel in an initialization control signal outputted in a high state in a first section And the initialization control signal line connected to the pixels arranged in the second block may receive the initialization control signal outputted in the high state in the second section in parallel.

Accordingly, after the initialization control signal is transmitted to the first block 110a, the initialization control signal may be transmitted to the second block 110b. The initialization control signal transmitted to the first block 110a may be simultaneously transmitted to the plurality of pixels included in the first block 110a and the initialization control signal transmitted to the second block 110b may be transmitted to the second May be simultaneously transmitted to a plurality of pixels included in the block 110b. Here, the same time may include not only completely identical but also some time differences. Here, the gate driver 130 is shown as a separate component from the display panel 110, but the present invention is not limited thereto. The gate driver 130 may be embedded in the display panel 110, And may be arranged in the form of a GIP (Gate In Panel) circuit.

Although the gate driver 130 generates both the gate signal and the initialization control signal and transmits the signal to the display panel 110, the present invention is not limited thereto. It is also possible to generate.

The control unit 140 may generate a control signal and transmit the control signal to the data driver 120 and the gate driver 130, respectively. The data driver 120 and the gate driver 130 can be operated. In addition, the controller 140 may receive the video signal from the external device and transmit the received video signal to the data driver 120. Also, the controller 140 may control the gate driver so that the initialization voltage Vref supplied to the initialization signal line Vinit is transmitted to each pixel in order to prevent motion blur. In addition, the controller 140 may control the driving unit that generates the initialization control signal when the initialization control signal is generated in the separate driving unit.

Accordingly, the organic light emitting diode display 100 emits a data signal to display a separate blank image because each block receiving the initialization control signal simultaneously emits no light and displays black, It is possible to prevent the motion blur by allowing the black image to be displayed without using it. Further, it is not necessary to write a separate black image for each frame, a data signal can be written when a black image is displayed, and the time for writing a data signal is shortened even in high resolution and / or high frequency driving May not occur.

2 is a circuit diagram showing one embodiment of a pixel employed in the organic light emitting display shown in FIG.

Referring to FIG. 2, the pixel 201 may include an organic light emitting diode (OLED) and a pixel circuit 201a.

The organic light emitting diode OLED emits light by flowing a driving current corresponding to the voltage of the anode electrode and the voltage of the cathode electrode. Further, the organic light emitting diode (OLED) includes an organic film and can emit red, green, blue, and / or white light by the organic film.

The pixel circuit 201a can transmit a driving current to the organic light emitting diode OLED. The pixel circuit 201a may include a first transistor M1, a second transistor M2, a third transistor M3, and a capacitor C. The first transistor M1 may be a driving transistor for generating a driving signal corresponding to a data signal.

The first transistor M1 may have a first electrode connected to the high potential line VL and a second electrode connected to the second node N2 and a gate electrode connected to the first node N1. And the second node N2 may be connected to the anode electrode of the organic light emitting diode OLED. The driving current may flow in the direction from the first electrode to the second electrode corresponding to the voltage transmitted to the first node N1.

The second transistor M2 may have a first electrode connected to the data line, a second electrode connected to the first node, and a gate electrode connected to the gate line GL. The data voltage transmitted through the data line Dm may be transmitted to the first node N1 in response to the gate signal transmitted through the gate line GL.

The third transistor may have a first electrode connected to the initialization signal line Vinit, a second electrode connected to the second node N2, and a gate electrode connected to the initialization control signal line SSn. The third transistor may transmit the initialization voltage Vref applied to the initialization signal line Vinit to the pixel 201 in response to the initialization control signal transmitted through the initialization control signal line SSn.

The capacitor C may be disposed between the first node and the second node to maintain the voltage of the first node N1 corresponding to the voltage stored in the capacitor C. In addition, the capacitor C may be initialized by the initialization voltage Vref transmitted through the initialization signal line Vinit connected to the second node N2. The initialization voltage may be lower than the threshold voltage of the organic light emitting diode OLED so that the driving current does not flow when the pixel 201 receives the initialization voltage.

Further, since the third transistor M3 can transmit the initialization voltage to the pixel circuit 201a through the initialization signal line during the period in which the third transistor M3 writes the data signal by using the gate signal, The organic light emitting diode can emit no light.

3 is a structural view showing an embodiment of a display panel divided into a plurality of blocks.

Referring to FIG. 3, the display panel 310 may be divided into first to fourth blocks 311 to 314 in a top-down direction with a uniform width. The division of the first to fourth blocks 311 to 314 is performed by using a plurality of initialization control signal lines SS1, SS2, ..., Sn-1, SSn shown in FIG. 1 of the display panel 310 . After the data signal and the initialization voltage are transferred to the first block 311, the data signal and the initialization voltage are transferred to the second block 312, and the data signal and the initialization voltage are transferred to the second block 312 The data signal and the initialization voltage may be transmitted to the third block 313. After the data signal and the initialization voltage are transferred to the third block 313, the data signal and the initialization voltage may be transferred to the fourth block 314.

Here, the widths of the first to fourth blocks 311 to 314 are shown as being uniform, but the present invention is not limited thereto. Also, although the display panel 310 is divided into the first to fourth blocks 311 to 314, the present invention is not limited thereto.

FIG. 4 is a structural diagram showing the light emission for each block in the display panel shown in FIG.

Referring to FIG. 4, a data signal and an initialization voltage may be transmitted to the first block 411 in the first period T12 of the second frame (2 frame). Since the initialization voltage is transmitted to the first block 411, the pixels included in the first block 411 may not emit light even if a data signal is transmitted. However, in the first period T12, the second block 412, the third block 413 and the fourth block 414 correspond to the second section T21 of the first frame (first frame), the third section T31 ) And the data signal transmitted to the fourth section T41.

The data signal and the initialization voltage may be transmitted to the second block 412 in the second section T22 of the second frame 2frame. The pixels included in the second block 412 may not emit light even if a data signal is transmitted because the initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the third block 413, and the pixels included in the fourth block 414 are not being supplied with the initialization voltage, The pixels included in the first block 411 emit light in response to the data signal written in the first section T12 and the pixels included in the third block 413 are emit light A driving current flows corresponding to the data signal written in the third period T31 of one frame (1 frame) to emit light, and the pixels included in the fourth block 414 emit light of the first frame (1 frame) The driving current may flow in response to the data signal written in the fourth period T41 to emit light.

The data signal and the initialization voltage may be transmitted to the third block 413 in the third period T32 of the second frame 2frame. The pixels included in the third block 413 may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the second block 412, and the pixels included in the fourth block 414 are not being supplied with the initialization voltage, The pixels included in the first block 411 are driven to emit light in response to the data signal written in the first section T12 and the pixels included in the second block 412 emit light The driving current flows in response to the data signal written in the second period T22 to emit light and the pixels included in the fourth block 414 emit light in the fourth period T41 of the first frame A driving current flows corresponding to the written data signal, and light can be emitted.

The data signal and the initialization voltage may be transmitted to the fourth block 414 in the fourth period T42 of the second frame 2frame. The pixels included in the fourth block 414 may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the second block 412, and the pixels included in the third block 413 are not transmitted with the initialization voltage, The pixels included in the first block 411 are driven to emit light in response to the data signal written in the first section T12 and the pixels included in the second block 412 emit light The driving current flows corresponding to the data signal written in the second period T22 to emit light and the pixels included in the third block 413 correspond to the data signal written in the third period T32 The driving current flows and light can be emitted.

The data signal and the initialization voltage may be transmitted to the first block 411 in the first period T13 of the third frame (3 frame). The pixels included in the first block may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the second block 412, the pixels included in the third block 413, and the initialization voltage included in the fourth block 414 are not received. Accordingly, the pixels included in the second block 412 emit light by holding the data signal written in the second section T22 of the second frame 2frame, and the pixels included in the third block 413 emit light The data signal written in the third section T32 of the second frame 2frame is held and emitted and the pixels included in the fourth block 414 are emitted to the fourth section T42 of the second frame 2frame The written data signal can be maintained and emitted.

The data signal and the initialization voltage may be transmitted to the second block 412 in the second period T23 of the third frame (3 frame). The pixels included in the second block 412 may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the third block 413, and the initialization voltage included in the fourth block 414 are not received. Accordingly, the pixels included in the first block 411 emit light by holding the data signal written in the first section T13 of the third frame (3 frame), and the pixels included in the third block 413 The data signal written in the third section T32 of the second frame 2frame is held and emitted and the pixels included in the fourth block 414 are emitted to the fourth section T42 of the second frame 2frame The written data signal can be maintained and emitted.

The data signal and the initialization voltage may be transmitted to the third block 413 in the third period T33 of the third frame (3 frame). The pixels included in the third block 413 may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the second block 412, and the initialization voltage included in the fourth block 413 are not received. Accordingly, the pixels included in the first block 411 emit light by holding the data signal written in the first section T13 of the third frame (3 frame), and the pixels included in the second block 412 emit light The data signal written to the second section T32 of the third frame 3frame is held and emitted and the pixels included in the fourth block 414 are emitted to the fourth section T42 of the second frame 2frame The written data signal can be maintained and emitted.

The data signal and the initialization voltage may be transmitted to the fourth block 414 in the fourth period T43 of the third frame (3 frame). The pixels included in the fourth block 414 may not emit light even if a data signal is transmitted because an initialization voltage is transmitted. However, the pixels included in the first block 411, the pixels included in the second block 412, and the initialization voltage included in the third block 413 are not received. Therefore, the pixels included in the first block 414 are caused to emit light by holding the data signal written in the first section T13 of the third frame, and the pixels included in the second block 412 emit light, The data signal written in the second section T22 of the third frame 3frame is held and lighted and the pixels included in the third block 413 are written into the third section T32 of the third frame 3frame The signal can be maintained and emitted.

Therefore, since each block in each frame emits light corresponding to the newly written data signal after displaying the black by non-light emission once, motion blur can be prevented. Further, it is not necessary to write a separate black image for each frame, a data signal can be written when a black image is displayed, and the time for writing a data signal is shortened even in high resolution and / or high frequency driving May not occur.

5 is a waveform diagram showing an embodiment of a waveform of a driving signal for driving the display panel shown in Fig.

5, the number of gate lines G1, G2, ..., Gn-1, Gn of the display panel 110 and the number of initialization control signal lines SS1, SS2, ..., SSn- ) Are 2160, respectively. However, the number of gate lines and the number of initialization control lines of the display panel 110 are not limited to this, and may be determined differently depending on the resolution of the display panel 110. [ Also, the display panel 110 is divided into the first to fifth initialization control lines SS1 to SS540, and the second block is divided into the 541st to the 1080th initialization control lines SS541 to SS541, SS1080), the third block is divided into the 1081 initialization control line to the 1620th initialization control line (SS1081 to SS1620), the fourth block is divided into the 1621st initialization control line to the 2160th initialization initialization control line SS1621 to SS2160 ). Here, the display panel 110 is described as being divided into four blocks by the initialization control line, but the present invention is not limited thereto.

In the first period T11, the display panel 110 may sequentially receive the first to fifth gate signals through the first to fifth gate lines S1 to S540. That is, the first to fifth gate signals may be sequentially input to the pixels arranged in the first block. Also, the display panel 110 may simultaneously receive the first initialization control signal to the 540 initialization control signal through the first initialization control line through the 540 initialization control lines SS1 through SS540. Here, the same time may include not only completely identical but also some differences. The first to fifth gate signals are shown to be supplied in the form of a square wave having a constant width. However, the present invention is not limited thereto, and waveforms other than square waves may be generated by an RC delay generated in each gate signal line . In addition, the first initialization control signal to the 540 initialization control signal may maintain the high state in the first section T11. However, the present invention is not limited to this, and a high state can be maintained in the first section T11 within an error range.

Since the first gate signal to the 540th gate signal are sequentially supplied in the first period T11, the pixels connected to the first gate line to the 540th gate line (S1 to S540) are sequentially supplied with the data signals have. However, the pixels arranged in the first block according to the first initialization control signal to the 540 initialization control signal transmitted in the first period T11 receive the initialization voltage and the driving current does not flow to the organic light emitting diode, It may not be able to emit light. However, since the initialization voltage is not transmitted in the first period T11, the pixels disposed in the second through fourth blocks can emit light corresponding to the data signal received in the previous frame.

In the second period T21, the display panel 110 can sequentially receive the 541 gate signal to the 1080 gate signal through the 541st gate line to the 1080th gate line (S541 through S1080). That is, the pixels arranged in the second block can sequentially receive the 541 gate signal to the 1080 gate signal. Also, the display panel 110 may simultaneously receive the 541 initialization control signal to the 1080 initialization control signal through the 541 initialization control line to the 1080 initialization control line (SS541 through SS1080). Here, the same time may include not only completely identical but also some differences. Although the 541 gate signal to the 1080th gate signal are shown to be supplied in the form of a square wave having a constant width, the present invention is not limited thereto. The RC signal delayed by the gate signal line, . In addition, the 541 initialization control signal to the 541 initialization control signal can maintain the high state in the second section T21. However, the present invention is not limited to this, and the high state can be maintained in the second section T21 within the error range.

Since the 541st gate signal to the 1080th gate signal are sequentially supplied in the second section T21, the pixels connected to the 541st gate line to the 1080th gate line S541 to S1080 are sequentially supplied with data signals have. The pixels arranged in the second block due to the 541 initialization control signal to the 1080 initialization control signal transmitted in the second section T21 receive the initialization voltage and the driving current does not flow to the organic light emitting diode, You can not. However, since the pixels arranged in the first block, the third block and the fourth block do not receive the initialization voltage in the second period, the pixels arranged in the first block are not received in the first period T11 The data signals can emit light and the pixels arranged in the third block and the fourth block can emit light by the data signal supplied from the previous frame.

In the third period T31, the display panel 110 can sequentially receive the 1081 gate signal to the 1620th gate signal through the 1081 gate line to the 1620 gate lines (S1081 to S1620). That is, the pixels arranged in the third block can sequentially receive the 1081 gate signal to the 1620 gate signal. In addition, the display panel 110 can simultaneously receive the 1081 initialization control signal to the 1620 initialization control signal through the 1081 initialization control line to the 1620 initialization control line (SS 1081 to SS 1620). Here, the same time may include not only completely identical but also some differences. Also, the 1081-gate signal to the 1620-th gate signal are shown to be supplied in the form of a square wave having a constant width, but the present invention is not limited thereto. The RC signal may include not only a square wave but also an RC delay generated in each gate signal line can do. In addition, the 1081 initialization control signal to the 1620 initialization control signal can maintain the high state in the third period T31. However, the present invention is not limited to this, and a high state can be maintained in the third section T31 within an error range.

Since the 1081 gate signal to the 1620 gate signal are sequentially supplied in the third period T31, the pixels connected to the 1080th gate line to the 1080th gate line (S1081 to S1620) are sequentially supplied with data signals have. The pixels arranged in the third block by the 1081 initialization control signal to the 1620 initialization control signal transmitted in the third period T31 receive the initialization voltage and the driving current does not flow to the organic light emitting diode, You can not.

In the fourth period T41, the 1621st gate signal to the 2160th gate signal can be sequentially supplied to the display panel 110 through the 1621st gate line to the 2160th gate line S1621 to S2160. That is, the pixels arranged in the fourth block can sequentially receive the 1621st gate signal to the 2160th gate signal. In addition, the pixels connected to the 1621st initialization control line through the 2160s initialization initialization control lines SS1621 through SS2160 of the display panel 110 can simultaneously receive the 1621 initialization control signal to the 2160 initialization control signal. Here, the same time may include not only completely identical but also some differences. Although the 1621st gate signal to the 2160th gate signal are shown to be supplied in the form of a square wave having a constant width, the present invention is not limited to this, and it is also possible to include not square waves by an RC delay generated in each gate signal line can do. In addition, the 1621st initialization control signal to the 2160th initialization control signal can maintain the high state in the fourth period T41. However, the present invention is not limited to this, and the high state can be maintained within the fourth section T41 within the error range.

Since the 1621st gate signal to the 2160th gate signal are sequentially supplied in the fourth period T41, the pixels connected to the 1621st gate line to the 2160th gate line can receive data signals sequentially. The pixels arranged in the fourth block due to the 1621st initialization control signal to the 2160th initialization control signal transmitted in the fourth period T41 receive the initialization voltage and the driving current does not flow to the organic light emitting diode, You can not. However, since the pixels arranged in the first to third blocks do not receive the initialization voltage in the fourth period T41, the first period T11, the second period T21, the third period T31, And emit light in response to the data signals received from the light emitting diodes.

Therefore, although the organic light emitting display device is implemented as an active matrix type, after the light emission corresponding to the data signal input in the previous period is completed for each block in one frame, before the light emission by the newly inputted data signal starts, It is possible to prevent the occurrence of motion blur.

Also, since the gate signal is sequentially transferred through all the gate lines in the first to fourth periods T11 to T41, even if the horizontal synchronization time (1H time) is shortened due to high resolution and / or high frequency driving, Since one data signal is written, the time for writing the data signal may become insufficient.

6 is a flowchart showing an embodiment of a driving method of the organic light emitting display shown in FIG.

Referring to FIG. 6, the driving method of the OLED display 100 may include driving the display panel 110 by dividing the display panel 110 into at least a first block 110a and a second block 110b. After the data signal and the initialization voltage are transmitted to the first block 110a (S600), the data signal and the initialization voltage may be transmitted to the second block 110b (S610). Therefore, the data signal can be written to the pixel when black is displayed, so that no time is required to display a separate black image.

When the data signal and the initialization voltage are transmitted to the first block 110a (S600), the data signal is written to the pixels disposed in the first block 110a, but the driving current does not flow due to the initialization voltage. Therefore, the pixels arranged in the first block 110a can emit light by non-emitting light before the light emission by the newly written data signal after the completion of the light emission by the previously written data signal, thereby expressing black.

When the data signal and the initialization voltage are transmitted to the second block 110b (S610), the data signals are also written to the pixels disposed in the second block 110b, but the driving current does not flow due to the initialization voltage . Accordingly, the pixels arranged in the second block 110b can also display black by emitting no light before the light emission by the newly written data signal after the completion of the light emission by the previously written data signal. Therefore, the black image can be inserted before the new image is displayed, thereby preventing the motion blur.

Since the initialization signal is not transferred to the first block 110a when the data signal and the initialization voltage are transferred to the second block 110b, the pixels disposed in the first block 110a are not transferred to the written data signal The light emission can be started.

Then, the second block 110b may emit light (S620). The light emission of the second block 110b may be a light emission in the same frame as the first block 110a or a light emission in a frame after the frame in which the first block 110a emits light. However, the second block 110b does not emit light when the data signal is written. Therefore, the writing time of the data signal can be prevented from being shortened.

Here, the initialization voltage may be lower than the threshold voltage of the organic light emitting diode included in the pixel shown in FIG. The data signals input to the first block 110a and the second block 110b may be data signals sequentially written in the first and second periods T11 and T21 of FIG. have. The data signals written to the first block 110a by the gate signal sequentially input to the first section T11 may be referred to as a first data signal and may be referred to as a gate signal sequentially input to the second section T21 The data signals written to the second block 110b may be referred to as a second data signal. In addition, the data signals included in the first data signal and the second data signal may not be the same data signal.

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: organic light emitting display
101: pixel
110: Display panel
110a: first block
110b: second block
120: Data driver
130: gate driver
140:

Claims (7)

A liquid crystal display device comprising: a plurality of pixels which receive a data signal and to which a driving current corresponding to the data signal flows, at least a first group of pixels of the plurality of pixels is divided into a first block, A display panel for dividing the display panel into a second block;
A data driver for outputting the data signal; And
A gate signal for writing the data signal to the plurality of pixels and an initialization control signal for transferring the initialization voltage for interrupting the flow of the driving current to the plurality of pixels, The initialization control signal is retained in the first block during a first period during which the initialization control signal is sequentially received, and the initialization control signal is maintained in the second block during a second period in which the pixels of the second block are sequentially received a gate signal. And a gate driver for outputting the gate signal. The method according to claim 1,
The pixel includes a first transistor which receives the data signal and drives a driving current corresponding to a voltage of the data signal to transmit the driving current to the organic light emitting diode, and a second transistor which transmits the data signal to the first transistor corresponding to the gate signal And a third transistor for transferring the initialization voltage to the organic light emitting diode in response to the initialization control signal, wherein the organic light emitting diode Display device. A first section in which a data signal is written and a flow of a driving current corresponding to the data signal is cut off and a second section in which the driving current flows in correspondence with the data signal written in the first section, A first block including a first group of pixels; And
The second period in which the data signal is written and the flow of the driving current corresponding to the data signal is cut off and the third period in which the driving current flows in correspondence with the data signal written in the second period, And a second block including a second group of pixels among the plurality of pixels. The method of claim 3,
Wherein the first block and the second block receive an initialization voltage in the first period and the second period to block the flow of the driving current. A driving method of an organic light emitting display device which drives a display panel by dividing a display block into at least a first block and a second block,
A first step of transferring a first data signal and a first initialization voltage to the first block and causing the first block to emit no light corresponding to the first initialization voltage; And
And a second step of transferring a second data signal and a second initialization voltage to the second block and causing the second block to emit no light corresponding to the second initialization voltage. 6. The method of claim 5,
Wherein the first block emits light corresponding to the first data signal transmitted to the first block in the second step. 6. The method of claim 5,
Wherein the second block emits light corresponding to the second data signal transmitted in the second step, wherein the second block emits light corresponding to the second data signal transmitted in the second step.

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