OLED display having sub-pixel structure that supports 2D and 3D image display modes

Discussed is an organic light emitting display device. The organic light emitting display device can include an organic light emitting panel in which a main organic light emitting diode (OLED) which emits light in a two-dimensional (2D) mode and a three-dimensional (3D) mode and an auxiliary OLED which emits light in only the 2D mode are disposed in each of a plurality of sub-pixels, a panel driver configured to drive the organic light emitting panel, and a patterned retarder bonded to the organic light emitting panel, and configured to change polarizing characteristics of a left image and a right image which are output from the organic light emitting panel.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority benefit of the Korean Patent Application No. 10-2013-0144203 filed on Nov. 26, 2013, which is hereby incorporated by reference as if fully set forth herein.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to an organic light emitting display device, and more particularly, to an organic light emitting display device for displaying a three-dimensional (3D) image and a method of driving the same.

Discussion of the Related Art

A flat panel display (FPD) device is applied to various electronic devices such as portable phones, tablet personal computers (PCs), notebook computers, monitors, etc. Examples of the FPD device include liquid crystal display (LCD) devices, plasma display panel (PDP) devices, organic light emitting display devices, etc. Recently, electrophoretic display (EPD) devices are being widely used as one type of the FPD device.

Among the display devices, the organic light emitting display devices use a self-emitting element, and thus have a fast response time, high emission efficiency, high luminance, and a broad viewing angle.

The organic light emitting display devices may display a three-dimensional (3D) image. The organic light emitting display devices three-dimensionally display an image by using characteristic where a sense of perspective is shown in combining different image signals discerned by two eyes.

A stereoscopic technique, a volumetric technique, and a holographic technique are known as methods of realizing a 3D image in the organic light emitting display devices.

Among these techniques, the stereoscopic technique is categorized into a glasses technique and a glasses-free technique. The glasses technique is again categorized into a polarized glasses technique and a shutter glasses technique. The polarized glasses technique is a method that changes the polarizing directions of a left image and a right image which are displayed in an organic light emitting display device, and displays an image in a polarized glasses direction. The shutter glasses technique is a method in which polarized glasses temporally divide and receive a left image and a right image which are displayed in an organic light emitting display device.

FIG. 1is a plan view of an organic light emitting panel applied to a related art organic light emitting display device using the polarized glasses technique.

As illustrated inFIG. 1, a plurality of sub-pixels which display red, green, or blue are formed in a related art organic light emitting panel10using the polarized glasses technique. An emission part21which displays an image and a black stripe22which cannot display an image are formed in each of the plurality of sub-pixels. Also, a bank part including a plurality of banks which divide the sub-pixels is formed between the sub-pixels.

The emission part21may be one selected from a red organic light emitting diode (OLED) R, a green OLED G, and a blue OLED B depending on an emitted color.

A red sub-pixel including the red OLED, a green sub-pixel including the green OLED, and a blue sub-pixel including the blue OLED constitute one unit pixel (hereinafter simply referred to as a pixel).

The bank part defines the emission part21. The bank part prevents optical and electrical interference from occurring between adjacent the emission parts21.

In a 3D mode, the organic light emitting panel10alternately displays a left image and a right image in units of a horizontal line. For example, when left images are output to odd-numbered horizontal lines, right images are output to even-numbered horizontal lines.

Moreover, although not shown, a polarizing layer including a patterned retarder is disposed at a front surface of the organic light emitting panel10. The polarizing layer changes a polarizing characteristic of the left image and a polarizing characteristic of the right image, and supplies the left image and the right image to polarized glasses.

The related art organic light emitting display device using the polarized glasses technique, crosstalk based on a viewing angle occurs. To solve such a problem, as illustrated inFIG. 1, the black stripe (BS)22which cannot output light is formed at a portion of the pixel20.

Therefore, in the related art organic light emitting display device in which the black stripe22is formed, crosstalk based on a viewing angle can be prevented from occurring in the 3D mode. However, in a two-dimensional (2D) mode, an aperture ratio is reduced, and for this reason, luminance is lowered.

To provide an additional description, in the related art organic light emitting display device using the polarized glassed technique, when an area of the black stripe22is enlarged, a viewing angle is broadened in viewing a 3D image. Therefore, a user can view a sharper 3D image at a broader up/down viewing angle. However, when the user views a 2D image by using the organic light emitting display device (a 3D display device) using the polarized glassed technique, a dark image which is reduced by a width of the black stripe22is viewed.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to provide an organic light emitting display device and a method of driving the same that substantially obviate one or more problems due to limitations and disadvantages of the related art.

An aspect of the present invention is directed to provide a 3D image display device and a method of driving the same, in which a main OLED which emits light in both a 2D mode and a 3D mode and an auxiliary OLED which emits light in only the 2D mode are formed in each sup-pixel which is formed in a panel.

To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided in one example an organic light emitting display device including: an organic light emitting panel in which a main organic light emitting diode (OLED) which emits light in a two-dimensional (2D) mode and a three-dimensional (3D) mode and an auxiliary OLED which emits light in only the 2D mode are disposed in each of a plurality of sub-pixels; a panel driver configured to drive the organic light emitting panel; and a patterned retarder bonded to the organic light emitting panel, and configured to change polarizing characteristics of a left image and a right image which are output from the organic light emitting panel.

In another aspect of the present invention, there is provided a method of an organic light emitting display device including: in a two-dimensional (2D) mode, supplying a driving current to a main anode of a main organic light emitting diode (OLED) formed in a sub-pixel and an auxiliary anode of an auxiliary OLED formed in the sub-pixel to emit light from the main OLED and the auxiliary OLED; and in a three-dimensional (3D) mode, supplying the driving current to the main anode to emit light from the main OLED, and preventing the driving current from being supplied to the auxiliary anode.

DETAILED DESCRIPTION OF THE INVENTION

As described above, the present invention relates to an organic light emitting display device displaying a 3D image by using the polarized glasses technique, and technology which may be used in part in the present invention is disclosed in Korean Patent Publication No. 10-2013-0036680.

FIG. 2is an exemplary diagram illustrating a configuration of an organic light emitting display device according to an embodiment of the present invention.

As illustrated inFIG. 2, the organic light emitting display device according to an embodiment of the present invention includes: an organic light emitting panel100in which a sub-pixel (P)110is formed in each of a plurality of intersection areas between a plurality of gate lines GL1to GLg and a plurality of data lines DL1to DLd; a gate driver200which sequentially supplies a scan pulse to the plurality of gate lines GL1to GLg formed in the organic light emitting panel100; a data driver300which respectively supplies data voltages to the plurality of data lines DL1to DLd formed in the organic light emitting panel100; a timing controller400which controls a function of the gate driver200and a function of the data driver300; and a patterned retarder500which is bonded to the organic light emitting panel100, and changes the polarizing characteristics of a left image and a right image which are output from the organic light emitting panel100. A generic name for the timing controller400, the gate driver200, and the data driver300is simply referred to as a panel driver. The panel driver drives the organic light emitting panel100.

The organic light emitting panel100outputs a 2D image in a 2D mode, and outputs a 3D image in a 3D mode.

In the organic light emitting panel100, the sub-pixel (P)110is formed in each of a plurality of areas defined by intersections between the plurality of gate lines GL and the plurality of data lines DL.

First, the sub-pixel110includes a main OLED which emits light in both the 2D mode and the 3D mode, an auxiliary OLED which emits light in only the 2D mode, and a driver which drives the main OLED and the auxiliary OLED.

In the organic light emitting panel100, a left image and a right image are alternately output in units of a horizontal line in the 3D mode. For example, when left images are output to odd-numbered horizontal lines, right images are output to even-numbered horizontal lines.

To this end, in the organic light emitting panel100, a plurality of left eye sub-pixels and a plurality of right eye sub-pixels are formed on different horizontal lines.

The sub-pixel110may be one selected from a red sub-pixel which outputs red, a green sub-pixel which outputs green, and a blue sub-pixel which outputs blue.

The red sub-pixel, the green sub-pixel, and the blue sub-pixel constitute one unit pixel (hereinafter simply referred to as a pixel).

Here, each of a plurality of the sub-pixels110may output one color selected from red, green, and blue, but all the sub-pixels110may output white light. In this case, a color filter may be formed at an upper end of the organic light emitting panel100.

Second, the main OLED and the auxiliary OLED are formed in a top emission type in which emitted light is output to the outside through an upper substrate.

The main OLED includes a main anode, a light emitting material part formed on the main anode, and a cathode formed on the light emitting material part.

The auxiliary OLED includes an auxiliary anode which is electrically isolated from the main anode, and shares the light emitting material part and the cathode with the main OLED.

The plurality of sub-pixels110are divided by a bank. The main anode and the auxiliary anode output light with a current which is applied thereto through a driving transistor (TFT) which is formed in the driver. An upper substrate is bonded to an upper end of the cathode.

Third, the driver includes a storage capacitor and at least two or more transistors which are connected to a corresponding data line DL and a corresponding gate line GL, and control emission of light from the main OLED and the auxiliary OLED.

The main anode configuring the main OLED and the auxiliary anode configuring the auxiliary OLED are connected to a first power source, and the cathode configuring the main OLED and the auxiliary OLED is connected to a second power source. The main OLED and the auxiliary OLED emits light having certain luminance in response to a current supplied from the driving transistor which is formed in the driver.

When the scan pulse is supplied to the gate line GL, the driver controls an amount of current supplied to the OLED according to a data voltage supplied through the data line DL.

To this end, the driving transistor is connected between the first power source and the main anode and auxiliary anode, and a switching transistor is connected between the driving transistor and the data line DL and gate line GL.

Hereinafter, a structure of the sub-pixel110, detailed configurations and functions of the main OLED and the auxiliary OLED, and a structure of the driver will be described in detail with reference toFIGS. 3 to 5.

The timing controller400outputs a gate control signal GCS for controlling the gate driver200and a data control signal DCS for controlling the data driver300, by using a vertical sync signal, a horizontal sync signal, and a clock which are supplied from an external system.

The timing controller400samples and realigns input image data supplied from the external system, and supplies the realigned digital image data to the data driver300.

That is, the timing controller400realigns the input image data supplied from the external system, and transfers the realigned digital image data to the data driver300. Also, the timing controller400generates the gate control signal GCS for controlling the gate driver200and the data control signal DCS for controlling the data driver300, by using the clock, the horizontal sync signal, the vertical sync signal, and a data enable signal which are supplied from the external system, and respectively transfers the gate control signal and the data control signal to the gate driver200and the data driver300. Here, the clock, the horizontal sync signal, and the vertical sync signal are simply referred to as a timing signal.

Particularly, in order to achieve the above-described object(s), the timing controller400may include: a receiver that receives the input image data and the above-described various signals from the external system; an image data processor that realigns the input image data received from the receiver so as to be suitable for the panel, and generates the realigned digital image data; a control signal generator that generates the gate control signal GCS for controlling the gate driver200and the data control signal DCS for controlling the data driver300, by using the signals received from the receiver; and a transferor that outputs the image data, generated by the image data processor, to the data driver300, and respectively outputs the gate control signal and the data control signal to the gate driver200and the data driver300.

Moreover, the timing controller400transfers a control signal to a switching unit which is provided in each of the plurality of sub-pixels110.

In the 2D mode, the switching unit controls the main OLED and the auxiliary OLED so that both the main OLED and the auxiliary OLED emit light. In the 3D mode, the switching unit controls the main OLED and the auxiliary OLED so that only the main OLED emits light, and the auxiliary OLED does not emit light.

Moreover, in the 3D mode, the timing controller400realigns the input image data so that a left image and a right image are output in units of a horizontal line.

A method in which a 2D image and a 3D image are output by the timing controller400and the data driver300may use a general method which is disclosed at present, and thus, its detailed description is not provided.

The data driver300converts the image data, input from the timing controller400, into analog data voltages, and respectively supplies the data voltages of one horizontal line to the data lines at every horizontal line in which the scan pulse is supplied to a corresponding gate line. That is, the data driver300converts the image data into the data voltages by using gamma voltages supplied from a gamma voltage generator (not shown), and respectively outputs the data voltages to the data lines.

That is, the data driver300shifts a source start pulse SSP from the timing controller400according to a source shift clock SSC to generate a sampling signal. The data driver300latches the image data, input according to the source shift clock SSC, according to the sampling signal to convert the image data into the data voltages, and respectively supplies the data voltages to the data lines in units of a horizontal line in response to a source output enable signal SOE.

To this end, the data driver300may include a shift register, a latch, a digital-to-analog converter (DAC), and an output buffer.

The shift register outputs the sampling signal by using the data control signal received from the timing controller400.

The latch latches the digital image data which are sequentially received from the timing controller400, and simultaneously outputs the latched image data to the DAC.

The DAC converts the image data, transferred from the latch, into the data voltages, and outputs the data voltages. That is, the DAC converts the image data into the data voltages by using the gamma voltages supplied from the gamma voltage generator (not shown), and respectively outputs the data voltages to the data lines.

The output buffer respectively outputs the data voltages, transferred from the DAC, to the data lines DL of the panel according to the source output enable signal SOE transferred from the timing controller400.

The gate driver200sequentially supplies the scan pule to the gate lines GL1to GLg of the panel100in response to the gate control signal input from the timing controller400. Therefore, a plurality of switching transistors which are respectively formed in a plurality of sub-pixels110of a corresponding horizontal line receiving the scan pulse are turned on, and an image is output to each of the plurality of sub-pixels110.

That is, the gate driver200shifts a gate start pulse GSP transferred from the timing controller400according to a gate shift clock GSC, and sequentially supplies the scan pulse having a gate-on voltage to the gate lines GL1to GLg. The gate driver200supplies a gate-off voltage to the gate lines GL1to GLg during the other period in which the scan pulse is not supplied.

The gate driver200may be provided independently from the panel100, and may be provided in a type which is electrically connected to the panel100by various methods. However, the gate driver200may be provided in a gate-in panel (GIP) type which is equipped in the panel100. In this case, examples of the gate control signal for controlling the gate driver200may include a start signal VST and a gate clock GCLK.

Hereinabove, the data driver300, the gate driver200, and the timing controller400have been described as being separately provided. However, at least one selected from the data driver300and the gate driver200may be provided as one body with the timing controller400. Hereinafter, a generic name for the gate driver200, the data driver300, and the timing controller400is referred to as a panel driver.

Finally, the patterned retarder500changes the polarizing directions of a left image and a right image which constitute a 3D image, and outputs the left image and the right image. That is, the patterned retarder500changes a vibration direction of light output from the organic light emitting panel100.

The patterned retarder500is divided into a plurality of left eye patterned retarders and a plurality of right eye patterned retarders. Each of the left eye patterned retarders is disposed in correspondence with a left eye sub-pixel which is formed in the organic light emitting panel100, and each of the right eye patterned retarders is disposed in correspondence with a right eye sub-pixel which is formed in the organic light emitting panel100.

Here, the left eye patterned retarder and the right eye patterned retarder have different light axes, and change a vibration direction of light, output from the organic light emitting panel100, to different directions.

That is, a direction of a light axis of light passing through the left eye patterned retarder differs from a direction of a light axis of light passing through the right eye patterned retarder.

The patterned retarder500may use a patterned retarder which is generally used at present. For example, the patterned retarder500may include a release film, an adhesive, an alignment layer (RM), a low haze TAC, and a protective layer. Therefore, a detailed description on the patterned retarder500is not provided.

Light output from the patterned retarder500is input to a user's eyes through a polarized glasses600. Therefore, the user can view a 3D image.

FIG. 3is an exemplary diagram illustrating configurations of sub-pixels applied to an organic light emitting display device according to an embodiment of the present invention.FIG. 4is an exemplary diagram illustrating a configuration of a driver which is provided in each of the sub-pixels ofFIG. 3.FIG. 5is an exemplary diagram illustrating a cross-sectional structure of each sub-pixel ofFIG. 3.

The sub-pixel110applied to the organic light emitting display device according to an embodiment of the present invention, as illustrated inFIGS. 3(a)-3(c)and4, includes: a driver115which is provided in an intersection area between a gate line GL and a data line DL, and includes a plurality of transistors TR1to TR3; a main OLED111which emits light with a driving current supplied from the driver115; an auxiliary OLED112which emits light with the driving current, and shares a cathode with the main OLED115; and a switching unit116which prevents the driving current from being supplied to the auxiliary OLED112in the 3D mode, and supplies the driving current to the auxiliary OLED112in the 2D mode, according to a control signal transferred from the panel driver400.

As illustrated inFIG. 4(a), the driver115may include: a driving transistor TR1which is connected between a high-level voltage VDD terminal and a low-level voltage VSS terminal, and drives the main OLED111and the auxiliary OLED112; a switching transistor TR2that is connected between the driving transistor TR1and the data line DL, and is turned on by the scan pulse supplied through the gate line GL; and a capacitor C which is connected to the main OLED111and a node which is disposed between the switching transistor TR2and the driving transistor TR1.

The driver115may further include a plurality of transistors for compensating for a deterioration of the main OLED111or the auxiliary OLED112, or sensing deterioration information.

A detailed configuration and function of the driver115are the same as those of a driver which is provided in a sub-pixel of an organic light emitting display device which is generally used at present, and thus, their detailed descriptions are not provided.

Since the main OLED111and the auxiliary OLED112are driven in the top emission type, the driver115may be provided to overlap the main OLED111and the auxiliary OLED112, in the sub-pixel110.

As illustrated inFIG. 4(a)andFIG. 5, the switching unit116is disposed between a main anode124configuring the main OLED111and an auxiliary anode128configuring the auxiliary OLED112.

The switching unit116prevents the driving current from being supplied to the auxiliary OLED112in the 3D mode, and supplies the driving current to the auxiliary OLED112in the 2D mode, according to the control signal CS transferred from the panel driver400, and particularly, the timing controller400.

The control signal CS is transferred to the switching unit116through a control signal line CL illustrated inFIG. 4.

That is, the main anode124and the auxiliary anode126are electrically isolated from each other by the switching unit116, and the switching unit116electrically connects the main anode124to the auxiliary anode128or electrically isolates the main anode124from the auxiliary anode128according to the control signal CS transferred from the panel driver400, and particularly, the timing controller400.

The switching unit116, as illustrated inFIG. 4(a)andFIG. 5, may be configured with a thin film transistor (TFT) T3.

Finally, the main OLED111and the auxiliary OLED112shares one cathode127.

In the 2D mode, the main OLED111and the auxiliary OLED112simultaneously emit light with a driving current transferred from the driver which is provided in the sub-pixel110. Also, in the 3D mode, the main OLED111emits light with the driving current, and the driving current is not supplied to the auxiliary OLED112.

The main anode124configuring the main OLED111is directly connected to the driver115, and the auxiliary anode128configuring the auxiliary OLED112is connected to the driver115and the main anode124through the switching unit116.

The main OLED111includes the main anode124, a light emitting material part126formed on the main anode124, and a cathode127formed on the light emitting material part126.

The auxiliary OLED112includes an auxiliary anode128which is electrically isolated from the main anode124, and shares the light emitting material part126and the cathode127with the main OLED111. That is, the cathode127configuring the auxiliary OLED112is the same as the cathode127configuring the main OLED111.

A configuration of the main OLED111and a configuration of the auxiliary OLED112will be described in detail with reference toFIG. 5.

First, as illustrated inFIG. 5, the main OLED111includes a substrate121, a plurality of insulating layers122which are stacked on the substrate121, the main anode124, a light emitting material part126which is stacked on the main anode124, and the cathode127which is stacked on the light emitting material part126.

The substrate121may be formed of a glass substrate, or may be formed of a synthetic resin substrate or a synthetic resin film.

The plurality of insulating layers122insulates various electrodes included in the driver115.

For example, as illustrated inFIG. 5, the driving transistor TR1configuring the driver115, a transistor T3used as the switching unit116, and the plurality of insulating layers which insulate a gate, a source, and a drain of each of the transistors are formed under the main anode124. InFIG. 5, only one of the plurality of insulating layers is referred to by reference numeral122. The plurality of insulating layers may be formed of various materials such as SiO2, SiNx, and SiOx.

The main anode124is formed of a conductive material, and particularly, may be formed of a material having a reflection function so as to reflect light, emitted from the light emitting material part126, in the cathode127direction. For example, the main anode124may be formed of metal such as aluminum (Al), tantalum (Ta), and silver (Ag).

The light emitting material part126may include a hole transport layer (HTL), an emission material layer (EML), and an electron transport layer (ETL).

In order to enhance an emission efficiency of the light emitting material part126, a hole injection layer (HIL) may be formed between the main anode124and the HTL, and an electron injection layer (EIL) may be formed between the cathode127and the ETL.

The cathode127outputs light, emitted from the light emitting material part126, to the outside.

The cathode127may be formed of indium tin oxide (ITO), or may be formed of a transparent metal thin layer. The transparent metal thin layer may be an aluminum thin layer. For example, when the aluminum thin layer is formed to a thickness of 20 nm or less, the aluminum thin layer has a transmittance of 50% to 70%. Therefore, the cathode127may be formed a transparent metal thin layer having a light transmittance of 50% to 70%.

The main OLED111is formed in the top emission type where light is output to the outside through the cathode127. In the main OLED111, when a positive (+) voltage and a negative (−) voltage are respectively applied to the main anode124and the cathode127, a positive hole of the main anode124and an electron of the cathode127are transferred to the EML, and thus, an exciton is generated. When the exciton is shifted from an excited state to a ground state, light is generated, and the light is emitted as visible light through the EML and the cathode127.

Second, as illustrated inFIG. 5, the auxiliary OLED112includes a substrate121, a plurality of insulating layers122which are stacked on the substrate121, the auxiliary anode128, a light emitting material part126which is stacked on the auxiliary anode128, and the cathode127which is stacked on the light emitting material part126.

The substrate121may be formed of a glass substrate, or may be formed of a synthetic resin substrate or a synthetic resin film.

The plurality of insulating layers122insulates various electrodes included in the driver115.

For example, as illustrated inFIG. 5, the driving transistor TR1configuring the driver115, a transistor T3used as the switching unit116, and the plurality of insulating layers which insulate a gate, a source, and a drain of each of the transistors are formed under the auxiliary anode128. InFIG. 5, only one of the plurality of insulating layers is referred to by reference numeral122. The plurality of insulating layers may be formed of various materials such as SiO2, SiNx, and SiOx.

The auxiliary anode128is formed of a conductive material, and particularly, may be formed of a material having a reflection function so as to reflect light, emitted from the light emitting material part126, in the cathode127direction. For example, the auxiliary anode128may be formed of metal such as aluminum (Al), tantalum (Ta), and silver (Ag).

The auxiliary anode128, as illustrated inFIG. 5, is isolated from the main anode124. However, the auxiliary anode128may be electrically connected to the main anode124through the switching unit116.

The light emitting material part126may include a hole transport layer (HTL), an emission material layer (EML), and an electron transport layer (ETL).

In order to enhance an emission efficiency of the light emitting material part126, a hole injection layer (HIL) may be formed between the main anode124and the HTL, and an electron injection layer (EIL) may be formed between the cathode127and the ETL.

The light emitting material part126configuring the auxiliary OLED112is the same as the light emitting material part126configuring the main OLED111. That is, the auxiliary OLED112and the main OLED111share the light emitting material part126.

The cathode127outputs light, emitted from the light emitting material part126, to the outside.

The cathode127may be formed of indium tin oxide (ITO), or may be formed of a transparent metal thin layer. The transparent metal thin layer may be an aluminum thin layer. For example, when the aluminum thin layer is formed to a thickness of 20 nm or less, the aluminum thin layer has a transmittance of 50% to 70%. Therefore, the cathode127may be formed a transparent metal thin layer having a light transmittance of 50% to 70%.

The cathode127configuring the auxiliary OLED112is the same as the cathode127configuring the main OLED111. That is, the auxiliary OLED112and the main OLED127share the cathode127.

The main OLED127and the auxiliary OLED112share the light emitting material part126and the cathode127, but a separate partition wall is not formed between the main OLED127and the auxiliary OLED112.

That is, the main OLED127and the auxiliary OLED112are formed in one sub-pixel110, and emit light of the same color in the 2D mode. Therefore, the main OLED127and the auxiliary OLED112may not be separated from each other by a partition wall.

Moreover, in the 3D mode, only the main OLED111emits light, and the auxiliary OLED112does not emit light. Therefore, the main OLED127and the auxiliary OLED112may not be separated from each other by the partition wall.

The auxiliary OLED112is formed in the top emission type where light is output to the outside through the cathode127. In the auxiliary OLED112, when a positive (+) voltage and a negative (−) voltage are respectively applied to the auxiliary anode128and the cathode127, a positive hole of the auxiliary anode128and an electron of the cathode127are transferred to the EML, and thus, an exciton is generated. When the exciton is shifted from an excited state to a ground state, light is generated, and the light is emitted as visible light through the EML and the cathode127.

An upper substrate for sealing the main OLED111and the auxiliary OLED112may be bonded to an upper end of the cathode127.

Moreover, the sub-pixel110defined by the main OLED111and the auxiliary OLED112is separated from another sub-pixel adjacent thereto by a bank125.

Hereinafter, a method of driving the organic light emitting display device according to an embodiment of the present invention will be described with reference toFIGS. 4(b) and 4(c).FIG. 4(a)is an exemplary diagram illustrating configurations of the driver115, the main OLED111, and the auxiliary OLED112which are formed in the sub-pixel110.FIG. 4(b)is an exemplary diagram for describing a method in which all the main OLED111and the auxiliary OLED112emit light in the 2D mode.FIG. 4(c)is an exemplary diagram for describing a method where in the 3D mode, the main OLED111emits light, and the auxiliary OLED112does not emit light.

When a 2D mode input signal is received from the external system, the timing controller400generates a control signal CS which turns on the switching unit116, and transfers the control signal CS to the switching unit116.

The switching unit116is turned on by the control signal.

The driving current is transferred from the driver115to the main OLED111and the auxiliary OLED112by driving of the panel drivers200,300and400.

Since the driving current is directly transferred to the main OLED111, the main OLED111emits light.

Since the switching unit116is turned on, the driving current is transferred to the auxiliary OLED112through the switching unit116. Therefore, the auxiliary OLED112may also emit light.

That is, in the 2D mode, as illustrated inFIG. 4(b), the driving current is supplied to the main anode124of the main OLED111formed in the sub-pixel110and the auxiliary anode128of the auxiliary OLED112formed in the sub-pixel110, and thus, the main OLED111and the auxiliary OLED112emit light.

When the 2D mode input signal is received from the external system, the timing controller400generates a control signal CS which turns off the switching unit116, and transfers the control signal CS to the switching unit116.

The switching unit116is turned off by the control signal.

The driving current is transferred from the driver115to the main OLED111and the auxiliary OLED112by driving of the panel drivers200,300and400.

Since the driving current is directly transferred to the main OLED111, the main OLED111emits light. However, since the switching unit116is turned off, the driving current cannot be transferred to the auxiliary OLED112through the switching unit116. Therefore, the auxiliary OLED112cannot emit light. In this case, the auxiliary OLED112performs a function of the black stripe.

Crosstalk based on a viewing angle can be reduced by the black stripe. That is, in the 3D mode, as illustrated inFIG. 4(c), the driving current is supplied to the main anode124, and thus, the main OLED111emits light. However, since the driving current is prevented from being supplied to the auxiliary anode128, the auxiliary OLED112cannot emit light.

According to the embodiments of the present invention, a user can view a 3D image at a broader up/down viewing angle, and can also view a brighter image even in the 2D mode. That is, an aperture ratio can be enhanced in the 2D mode.

Moreover, according to the embodiments of the present invention, a service life of the organic light emitting display device can be enhanced.

Moreover, according to the embodiments of the present invention, except that the main anode configuring the main OLED which emits light in both the 2D mode and the 3D mode is isolated from the auxiliary anode configuring the auxiliary OLED which emits light in only the 2D mode, a related art process of forming an OLED is identically performed. Accordingly, it is not required to add a new process.

Moreover, since the main anode and the auxiliary anode may be formed by the same manufacturing process as a related art anode manufacturing process, a process and the cost are not additionally required for forming the main anode and the auxiliary anode.