KR20200058891A - Organic light emitting display apparatus - Google Patents

Abstract

An objective of the present invention is to provide an organic light emitting display device for reducing a light emission period of organic light emitting diodes provided in a camera area when a camera mounted in a camera area of a display area where an image is outputted is operated. The organic light emitting display device comprises: a display panel; a camera; a gate driver; a data driver; and a control unit.

Description

Organic light emitting display device {ORGANIC LIGHT EMITTING DISPLAY APPARATUS}

The present invention relates to an organic light emitting display device in which a camera is mounted in the front direction of the organic light emitting display panel.

As various types of applications are provided in electronic devices such as smart phones, users require a display device having a wider display.

In addition, in an electronic device such as a smartphone, a camera is mounted in the front direction of the display panel so that a user can take a picture of himself while looking at him.

In this case, in order to maximize the width of the display unit on which the image is displayed on the display device, the camera is preferably mounted on the display area of the display panel.

However, since image output and camera operation cannot be performed at the same time, in an organic light emitting display device in which a camera is mounted in a display area, an image may be output in an area in which the camera is mounted in the display area while the camera is operating. Can't.

In this case, the user's satisfaction may be deteriorated, and thus, supplementation is necessary.

The object of the present invention proposed to solve the above-described problem is to reduce the light emission period of the organic light emitting diodes provided in the camera area when the camera mounted in the camera area is driven among the display areas in which the image is output. , To provide an organic light emitting display device.

An organic light emitting display device according to the present invention for achieving the above technical problem, an organic light emitting display panel including a display area on which an image is output and a non-display area provided outside the display area, the rear surface of the organic light emitting display panel It is provided in the, provided in the camera area formed on one end portion of the display area of the display area, the camera photographing the front direction of the organic light emitting display panel, the gate pulse to the gate lines provided in the organic light emitting display panel It includes a gate driver for sequentially supplying, a data driver for supplying data voltages to data lines provided on the organic light emitting display panel, and a controller for controlling the driving of the camera, the gate driver, and the data driver. In the camera mode in which the camera is driven, the control unit decreases the light emission period of the organic light emitting diodes provided in the camera area among the organic light emitting diodes provided in the organic light emitting display panel, and the camera shooting signal from an external system. When received, the camera is controlled to open the shutter of the camera at a timing when the organic light emitting diodes of the camera area do not emit light.

The present invention reduces the light emission period of the organic light emitting diodes provided in the camera area when the camera mounted in the camera area among the display areas in which the image is output is driven, in particular, the organic light emitting diodes provided in the camera area The camera is to shoot an image during a period in which they do not emit light.

Therefore, according to the present invention, even if the camera is driven, an image may be continuously output in the entire display area.

1 is an exemplary view showing an external configuration of an electronic device to which an organic light emitting display device according to the present invention is applied.
2 is an exemplary view showing an internal configuration of an organic light emitting display device according to the present invention.
3 is an exemplary view showing an external configuration of an organic light emitting display device according to the present invention.
4 is an exemplary view showing a structure of a pixel applied to an organic light emitting display device according to the present invention.
5 is an exemplary view showing a structure of a control unit applied to the organic light emitting display device according to the present invention.
6 is an exemplary view showing a structure of a gate driver applied to the organic light emitting display device according to the present invention.
7 is a waveform diagram showing display mode emission signals and camera mode emission signals applied to the organic light emitting display device according to the present invention.
8 is a waveform diagram showing emission signals applied to the camera mode of the organic light emitting display device according to the present invention.
9 is another waveform diagram showing emission signals applied to the camera mode of the organic light emitting display device according to the present invention.
10 is a cross-sectional view of an organic light emitting display panel applied to an organic light emitting display device according to the present invention.
11 is an exemplary view schematically showing an enlarged area 'C' shown in FIG. 1.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and have ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims.

It should be noted that in this specification, when adding reference numerals to components of each drawing, the same components have the same number as possible, even if they are displayed on different drawings.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for explaining embodiments of the present invention are exemplary, and the present invention is not limited to the illustrated matters. The same reference numerals refer to the same components throughout the specification. In addition, in the description of the present invention, when it is determined that detailed descriptions of related known technologies may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. When 'include', 'have', 'consist of', etc. mentioned in the specification are used, other parts may be added unless '~ man' is used. When a component is expressed as a singular number, the plural number is included unless otherwise specified.

In interpreting the components, it is interpreted as including the error range even if there is no explicit description.

In the case of the description of the positional relationship, for example, when the positional relationship of two parts is described as '~ top', '~ upper', '~ bottom', '~ side', etc. Alternatively, one or more other parts may be located between the two parts unless 'direct' is used.

In the case of a description of a time relationship, for example, 'after', 'following', '~ after', '~ before', etc. When a temporal sequential relationship is described, 'right' or 'direct' It may also include cases that are not continuous unless it is used.

It should be understood that the term “at least one” includes all possible combinations from one or more related items. For example, the meaning of 'at least one of the first item, the second item, and the third item' means 2 of the first item, the second item, and the third item, as well as the first item, the second item, or the third item, respectively. Any combination of items that can be presented from more than one dog.

The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are only used to distinguish one component from another component. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

Each of the features of the various embodiments of the present invention may be partially or wholly combined or combined with each other, technically various interlocking and driving may be possible, and each of the embodiments may be independently implemented with respect to each other or may be implemented together in an association relationship. It might be.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary view showing an external configuration of an electronic device to which an organic light emitting display device according to the present invention is applied.

The organic light emitting display device according to the present invention may constitute an electronic device. The electronic device may be, for example, a smart phone, tablet PC, television, monitor, or the like. 1, a smart phone is shown as an example of the electronic device, and in the following description, the present invention will be described with reference to an example in which the electronic device is a smart phone.

2 is an exemplary view showing an internal configuration of an organic light emitting display device according to the present invention, and FIG. 3 is an exemplary view showing an external configuration of an organic light emitting display device according to the present invention.

1 and 2, the electronic device includes an organic light emitting display device 10 and an outer case 20 covering the organic light emitting display device according to the present invention.

The organic light emitting display device according to the present invention, as shown in Figures 1 and 2, an organic light emitting display including a display area (AA) for outputting an image and a non-display area (NAA) provided outside the display area Panel 100, a camera 500 provided on a rear surface of the organic light emitting display panel, and provided in a camera area AA1 formed at one end of the display area among the display areas AA, and the organic light emitting display panel A gate driver 200 sequentially supplying gate pulses to the gate lines GL1 to GLg provided in the data driver, and a data driver supplying data voltages to the data lines DL1 to DGd provided in the organic light emitting display panel ( 300) and the camera 500, the gate driver 200, and a control unit 400 controlling the driving of the data driver 300.

In the camera mode in which the camera is driven, the control unit 400 includes the organic light emitting diodes (hereinafter simply referred to as the camera area organic light emitting diodes) provided in the camera area among the organic light emitting diodes provided in the organic light emitting display panel. When the camera photographing signal is received from the external system 800, the camera 500 is controlled to open the shutter of the camera 500 at a timing when the organic light emitting diodes of the camera area do not emit light.

The camera 500 is provided between the outer case 20 and the organic light emitting display panel 100 and is driven under the control of the control unit 400. The camera 500 is provided on the rear surface of the organic light emitting display panel 100 as shown in FIG. 3, and has a function of photographing a front direction of the organic light emitting display panel 100 indicated by an arrow in FIG. 3. Perform. Here, the front of the organic light emitting display panel 100 means a direction in which an image is output from the organic light emitting display panel 100.

The gate driver 200 may be installed in the non-display area NAA after being configured as an integrated circuit, or may be directly embedded in the non-display area NAA.

The data driver 300 may be provided on the chip-on film 600 attached to the organic light emitting display panel 100. The chip-on film 600 is also connected to the main substrate 700 provided with the control unit 400.

In this case, the chip-on film 600 is provided with lines that electrically connect the control unit 400, the data driver 300, and the organic light emitting display panel 100. To this end, the lines The main substrate 700 and the pads provided on the organic light emitting display panel 100 are electrically connected.

The main substrate 700 is electrically connected to the external substrate 900 on which the external system 800 is mounted.

The data driver 300 may be directly mounted on the organic light emitting display panel 100 and then electrically connected to the main substrate 700.

Therefore, the external configuration of the organic light emitting display device 10 may be changed in various forms in addition to the form illustrated in FIG. 3.

The external system 800 functions to drive the control unit 400 and the electronic device.

That is, when the electronic device is a smart phone, the external system 800 performs various audio information, image information, text information, etc. through a wireless communication network, and transmits the image information to the control unit 400. In the following description, the image information transmitted to the control unit 400 is referred to as input image data.

Also, the external system 800 may execute an application that controls the camera 500. The application may be executed by the external system 800 after being downloaded to the external system 800 in the form of an app.

The organic light emitting display panel 100 is provided with pixels 110 including an organic light emitting diode and a pixel driving circuit for driving the organic light emitting diode. In addition, signal lines for defining a pixel region in which the pixels 110 are formed and supplying a driving signal to the pixel driving circuit are formed in the organic light emitting display panel 100.

The signal lines include various types of lines in addition to the gate lines GL1 to GLg and the data lines DL1 to DLd.

1 and 2, the organic light emitting display panel 100 includes a display area AA in which an image is output, and a non-display area NAA provided outside the display area.

The display area AA is a camera area AA1 in which the camera 500 is disposed, and a boundary area AA2 in which pixel driving circuits of the pixel driving circuits drive the camera area organic light emitting diodes are provided. , And a main area AA3 excluding the camera area AA1 and the boundary area AA2 among the display areas AA.

The camera area AA1 is formed to be transparent so that external light can enter the camera. That is, the camera area AA1 is provided between the light emitting area in which the camera area organic light emitting diodes outputting an image and the light emitting areas are provided, and receives external light incident from the front surface of the organic light emitting display panel 100. It includes transmission regions that are transmitted through the camera 500 provided on the rear surface of the organic light emitting display panel 100. In this case, the light emitting region may also be configured to allow a portion of the external light to pass through.

The non-display area (NAA) faces the first non-display area (NAA1) with the first non-display area (NAA1) adjacent to the camera area (AA1) and the display area (AA) interposed therebetween. A second non-display area (NAA2), a third non-display area provided between the first non-display area and the second non-display area, and the display area (AA) are interposed between the third non-display area and the third non-display area. Includes the fourth non-display area being viewed.

After the width of the non-display area (NAA) is formed very small, if most of the non-display area (NAA) is covered by the outer case 20, as shown in Figure 1, the front of the electronic device Only the display area AA may be exposed.

4 is an exemplary view showing a structure of a pixel applied to an organic light emitting display device according to the present invention.

In the display area AA of the organic light emitting display panel 100, pixels 110 including an organic light emitting diode OLED and a pixel driving circuit PDC driving the organic light emitting diode OLED are provided. . Further, the organic light emitting display panel 100 is formed with signal lines defining a pixel region in which the pixels 110 are formed and supplying a driving signal to the pixel driving circuit PDC.

The signal lines include gate line GL, data lines DL, sensing pulse line SPL, sensing line SL, first driving power line PLA, second driving power line PLB, and emission Line EL, and the like.

The gate lines GL may be formed side by side to have a constant interval along the second direction of the organic light emitting display panel 100, for example, a horizontal direction.

The sensing pulse lines SPL may be formed at regular intervals to be parallel to the gate lines GL.

The data lines DL have a predetermined interval along a first direction, for example, a vertical direction, of the organic light emitting display panel 100 to intersect with the gate lines GL and the sensing pulse lines SPL. Can be formed side by side.

The sensing lines SL may be formed at regular intervals to be parallel to the data lines DL.

The first driving power line PLA may be formed at regular intervals to be parallel to the data line DL and the sensing line SL. The first driving power line PLA is connected to the power supply 500 and supplies the first driving power EVDD supplied from the power supply 500 to each pixel 110.

The second driving power line PLB supplies the second driving power EVSS supplied from the power supply unit 500 to each pixel 110.

The emission lines EL may be formed in parallel with the gate lines.

The pixel driving circuit PDC includes a driving transistor Tdr that controls the amount of current flowing through the organic light emitting diode OLED, between the data line DL and the driving transistor Tdr and the gate line GL. A switching transistor Tsw1 connected to and an emission transistor Tsw3 for controlling current flow to the driving transistor Tdr is provided. Also, a capacitor Cst and a sensing transistor Tsw2 may be provided in the pixel driving circuit PDC.

The switching transistor Tsw1 is turned on by a gate pulse constituting a gate signal transmitted through the gate line GL, and the data voltage Vdata supplied from the data line DL is driven by the driving transistor Tdr. Output to the gate.

The sensing transistor Tsw2 is switched by the scan signal SS transmitted through the sensing pulse line SPL, and the sensing line voltage supplied through the sensing line SL is the source of the driving transistor Tdr. The voltage supplied to the electrode or applied to the source electrode may be transmitted to the sensing line SL.

The emission transistor Tsw3 is turned on by an emission turn-on pulse constituting an emission signal transmitted through the emission line EL, to the organic light emitting diode OLED through the driving transistor Tdr. A current may flow or may be turned off by an emission turnoff pulse constituting the emission signal, so that current does not flow to the organic light emitting diode (OLED).

The capacitor Cst is formed between the gate and the source of the driving transistor Tdr to charge the data voltage transmitted through the switching transistor Tsw1, and the driving transistor Tdr is the capacitor Cst. It is driven according to the voltage charged.

That is, the driving transistor Tdr is turned on by the voltage charged in the capacitor Cst to control the amount of data current flowing from the first driving power line PLA to the organic light emitting diode OLED.

The organic light emitting diode OLED emits light by the data current supplied from the driving transistor Tdr to emit light having a luminance corresponding to the data current.

The structure of the pixel driving circuit PDC may be formed in various structures in addition to the structure shown in FIG. 4.

For example, in FIG. 4, the transistors are formed in a P type, and a pixel driving circuit (PDC) including four transistors is shown, but the pixel driving circuit (PDC) includes five or more transistors. Can be.

That is, in order to compensate for a change in threshold voltage or mobility due to deterioration of the driving transistor Tdr, at least one transistor and at least one capacitor are further included in the pixel driving circuit PDC in addition to the sensing transistor Tsw2. It may be provided.

Hereinafter, an organic light emitting display device including the pixels 110 illustrated in FIG. 4 is described as an example of the present invention.

5 is an exemplary view showing a structure of a control unit applied to an organic light emitting display device according to the present invention.

2 and 5, the control unit 400 uses a timing synchronization signal (TSS) input from the external system 800 to control driving of the gate driver 200. A control signal GCS and a data control signal DCS for controlling driving of the data driver 300 are respectively generated.

In the camera mode in which the camera 500 is driven, the control unit 400 reduces the light emission period of the organic light emitting diodes in the camera area among the organic light emitting diodes (OLEDs) provided in the organic light emitting display panel, and the external system ( When the camera photographing signal is received from 800), the camera 500 is controlled to open the shutter of the camera 500 at a timing when the organic light emitting diodes of the camera area do not emit light.

The camera mode refers to a mode in which the camera 500 is driven by an application executed in the electronic device, and the camera photographing signal is transmitted from the external system 800 when camera photographing is requested through the application. It is a signal transmitted to the control unit 400.

That is, when the camera photographing signal is received in the camera mode, the camera 500 is driven to take an image, and the photographed image can be transmitted to the external system 800 for storage.

However, when the camera mode is started, the camera 500 continuously photographs images and transmits the captured images to the control unit 400, and the control unit 400 transmits images from the camera 500 It generates image data for and transmits it to the data driver 300, and the data driver 300 outputs data voltages corresponding to the image data to the data lines.

Accordingly, even if the camera photographing signal is not received, the camera 500 continuously photographs images, and the image photographed by the camera photographing signal is stored in the external system 800.

Particularly, in the camera mode, the control unit 400 generates image data corresponding to the organic light emitting diodes provided in the display area AA including the camera area AA1, so that the data driver 300 ), And the data driver 300 supplies data voltages corresponding to the image data to the data lines to output an image to the display area AA.

Accordingly, even in the camera mode, an image, that is, an image captured through the camera 500, may be output not only in the boundary area AA2 and the main area AA3, but also in the camera area AA1. .

In more detail, according to the present invention, an image may be output through the entire display area AA not only in the general display mode in which the camera 500 is not driven, but also in the camera mode. Accordingly, the user can view an image output through the entire display area AA not only in the display mode but also in the camera mode.

In the camera mode, the width of the camera mode emission turnoff pulses that turn off the camera area emission transistors that allow current to flow to the camera area organic light emitting diodes is the camera area emmi in a display mode other than the camera mode. The width of the display mode emission turn-off pulses that turn off the option transistors is increased, so that the light emission period of the organic light emitting diodes in the camera area is reduced.

To this end, the controller 400 transmits, in the camera mode, camera mode emission clocks to the gate driver 200 to increase the width of the camera mode emission turnoff pulses, and the gate driver 200 ) Generates the camera mode emission turnoff pulses using the camera mode emission clocks, and then transmits the camera mode emission turnoff pulses to the camera area emission transistors.

In addition, in the camera mode, the controller 400 generates image data by increasing the luminance of input image data corresponding to the camera region organic light emitting diodes, and transmits the image data to the data driver to emit light. The reduction in luminance of the organic light emitting diodes in the camera area may be compensated for as the period decreases.

In order to perform the functions as described above, the control unit 400, as shown in Figure 5, using the timing synchronization signal (TSS) transmitted from the external system 800, the external system 800 The data alignment unit 430 for reordering the input image data Ri, Gi, and Bi, which has been transmitted from, and supplying the rearranged image data to the data driver 300, the timing synchronization signal (TSS) is used to A control signal generator 420 for generating a gate control signal GCS and the data control signal DCS, the timing synchronization signal TSS and input image data Ri transmitted from the external system 800. Gi, Bi) and the input unit 410 for receiving the camera input image data Camera_i transmitted from the camera 500 and transmitting them to the data alignment unit 430 and the control signal generation unit 420, and The data driver 300 or the gate driver 200 uses the image data generated by the data alignment unit 430 and the control signals DCS and GCS generated by the control signal generation unit 420. ) Includes an output unit 440 for output. In addition, the control unit 400 may further include a storage unit 450 for storing compensation values to be applied to compensation of the camera input image data Camera_i. However, the storage unit 450 may be configured independently of the control unit 400 as illustrated in FIG. 5.

As described above, the input unit 410 receives the timing synchronization signal (TSS), the input image data (Ri, Gi, Bi), and the camera input image data (Camera_i), so that the data alignment unit ( 430) and the control signal generator 420.

In the display mode, the data alignment unit 430 rearranges input image data Ri, Gi, and Bi transmitted from the external system 800 and transmits rearranged image data to the data driver 300. .

In the camera mode, the data alignment unit 430 rearranges camera input image data Camera_i transmitted from the camera 500 and transmits rearranged camera image data to the data driver 300.

When the compensation value for the camera input image data (Camera_i) is stored in the storage unit 450, the data alignment unit 430 receives the camera input image data (Camera_i) received in the camera mode. The camera image data may be generated by compensating using the compensation value.

The compensation value may be preset in a manufacturing step of the organic light emitting display panel 100 and stored in the storage 450 to increase the luminance of the camera input image data Camera_i.

For example, as described above, the control unit 400 reduces the light emission period of the organic light emitting diodes in the camera area in the camera mode, and accordingly, of the image output through the camera area AA1. The brightness may be smaller than the brightness of the image output through the boundary area AA2 and the main area AA3.

That is, in the camera mode, images captured through the camera 500 are output to the display area AA, and in this case, for the same reason as described above, images output through the camera area AA1. The brightness of the image may be smaller than the brightness of the image output through the boundary area AA2 and the main area AA3.

This phenomenon always occurs in the camera mode. In the camera mode, since the light emission period of the organic light emitting diodes in the camera area can be calculated and the reduction rate of luminance can be determined, the brightness of the image output through the camera area AA1 and the boundary area ( The brightness of the image output through AA2) and the main area AA3 may be calculated in a constant relational expression.

Therefore, the manufacturer of the organic light emitting display device, in the manufacturing step of the organic light emitting display device, using the relational expression, in the camera mode, a compensation value to compensate for camera input image data corresponding to the camera area AA1. The set compensation values are stored in the storage unit 450.

Here, the method of generating the compensation values and the method of compensating the camera input image data (Camera_i) using the compensation values are any of methods currently used for luminance compensation in the organic light emitting display device. Or can be implemented using methods commonly used for luminance compensation. The object and feature of the present invention are not in the method of compensating for the camera input image data. Therefore, the method for generating the compensation values and the compensation method are briefly described below.

In addition, in the following description, when there is no need to specifically distinguish, the camera image data generated without using the compensation value, the camera image data generated using the compensation value, and the display mode The generated image data are collectively called simply image data.

The control signal generator 420 generates the gate control signal GCS and the data control signal DCS using the timing synchronization signal TSS.

The gate control signal GCS includes a gate start signal, an emission start signal, at least one wake clock, at least one display mode emission clock, and at least one camera mode emission clock.

The control signal generator 420 generates the display mode emission clocks in the display mode and transmits them to the gate driver 200, and the gate driver 200 displays the display using the display mode emission clocks. A display mode emission signal including a mode emission turn-off pulse and the display mode emission turn-on pulse is generated.

In the camera mode, the control signal generator 420 generates the camera mode emission clocks and transmits them to the gate driver 200, and the gate driver 200 uses the camera mode emission clocks to generate the cameras. A camera mode emission signal including a mode emission turn-off pulse and the camera mode emission turn-on pulse is generated.

In the following description, when there is no need to specifically distinguish, the display mode emission signal and the camera mode emission signal are collectively referred to as the emission signal EM. That is, when it is not necessary to distinguish the display mode emission signal from the camera mode emission signal, the emission signal is used, and in other cases, the display mode emission signal and the camera mode emission signal are used.

However, in the camera mode, not only the camera mode emission signal is generated.

That is, even in the camera mode, the emission transistor (hereinafter, simply referred to as the display area organic light emitting diode) provided in the boundary area AA2 and the main area AA3 adjusts the emission period (hereinafter, The display mode emission signals may be transmitted to the display area emission transistors.

In detail, the control signal generation unit 420 may generate and transmit only the display mode emission clocks in the display mode to the gate driver 200.

However, in the camera mode, the control signal generation unit 420 may generate only the camera mode emission clocks and transmit them to the gate driver 200, or the camera mode emission clocks and the display mode All of the emission clocks may be generated and transmitted to the gate driver 200.

In particular, in the camera mode, when both the camera mode emission clocks and the display mode emission clocks are generated, the control signal generator 420 first generates the display mode emission clocks to generate the gate driver ( 200), the camera mode emission clocks may be generated and transmitted to the gate driver 200.

For example, the gate pulse is from the other side of the display area AA, for example, as shown in FIG. 2, from the first gate line GL1 provided in the lower portion of the display area AA. When sequentially supplied to the one side of the display area, for example, the g-th gate line GLg provided in the upper portion of the display area AA, the display mode emission turnoff pulse is also displayed. It is transmitted from the other side of the area AA to the one side.

In this case, since the camera area emission transistors are provided on the one side of the display area AA, first, the display mode emission turnoff pulses are first supplied to the organic light emitting display panel 100, The camera mode emission turnoff pulses are supplied to the organic light emitting display panel 100.

Accordingly, after the display mode emission clocks are transmitted to the gate driver 200, the camera mode emission clocks may be transmitted to the gate driver 200.

However, when gate pulses are preferentially supplied to the camera area AA1 and then gate pulses are supplied to the boundary area AA2 and the main area AA3, the camera mode emission clocks are applied to the gate. After being transmitted to the driver 200, the display mode emission clocks may be transmitted to the gate driver 200.

6 is an exemplary view showing a structure of a gate driver applied to the organic light emitting display device according to the present invention, and FIG. 7 is a display mode emission signal and a camera mode emission signal applied to the organic light emitting display device according to the present invention. It is a waveform diagram showing them. In the following description, contents identical or similar to those described with reference to FIGS. 1 to 5 are omitted or simply described.

6, the gate driver 200 includes first to gth stages ST1 to STg.

Each of the first to g-th stages ST1 to STg generates a gate signal VG and an emission signal EM and outputs the gate signal GL and the emission line EL.

For example, the first stage ST1 driven by the gate start signal transmitted from the gate driver 200 uses a first gate signal VG1 using at least one gate clock transmitted from the gate driver 200. ), The first gate signal VG1 is output to the first gate line GL1, and the first stage ST1 is driven by the emission start signal transmitted from the gate driver 200. After generating a first emission signal using at least one emission clock transmitted from the gate driver 200, the first emission line is formed in parallel with the first emission line GL1. The emission signal EM1 is output.

In this case, the first gate signal VG1 and the first emission signal EM1 drive the second stage ST2, and accordingly, the second stage ST2 is the second gate signal VG2. And a second emission line EM2 that is formed in parallel with the second gate line GL2 and the second gate line GL2 by generating the second emission signal EM2, and the second gate signal VG2. The second emission signal EM2 is output.

In addition, the g-1 gate signal VGg-1 and the g-1 emission signal EMg-1 output from the g-1 stage STg-1 drive the g-stage STg. Accordingly, the g-th stage STg generates the g-th gate signal VGg and the g-th emission signal EMg to be parallel to the g-th gate line GLg and the g-th gate line GLg. The g-th gate signal VGg and the g-th emission signal EMg are output to the formed g-th emission line.

In this case, the order in which the first to gth gate signals VG to VGg and the first to g emission signals EM1 to EMg are output in the present invention is not limited to the order described above. . Accordingly, in the present invention, the order in which the first to gth gate signals VG to VGg and the first to g emission signals EM1 to EMg are output may be variously changed.

In addition, the structure of the stages ST1 to STg for outputting the first to gth gate signals VG to VGg and the first to g emission signals EM1 to EMg is currently It can be variously designed using stages for generating gate signals and emission signals that are generally used. That is, the structure of the stages ST1 to STg may be formed in various forms using the structures of the stages currently being used.

Explained further, the feature of the present invention is not in the structure of the stages ST1 to STg for generating the gate signals VG1 to VGg and the emission signals EM1 to EMg. The structure of the stages ST1 to STg for generating the gate signals and emission signals in the same order may be formed in various forms by those skilled in the art. Therefore, in the following description, the structure of the stages is briefly described.

As described above, in the camera mode, the width of the camera mode emission turnoff pulses that turn off the camera area emission transistors that allow current to flow to the camera area organic light emitting diodes is different from the camera mode. In the display mode, the width of the display mode emission turnoff pulses that turn off the camera area emission transistors is increased, and accordingly, the light emission period of the organic light emitting diodes in the camera area is reduced.

For example, the nth to gth gate pulses GP of the nth to gth gate signals VGn to VGg used for driving the organic light emitting diodes of the camera area are formed in the form as shown in FIG. 7. When the display mode emission signal (EM_display) used for driving the organic light emitting diodes of the camera area in the display mode of the organic light emitting display device according to the present invention, the turn-off pulse (Yoff ') Only some of the gate pulses GP of the n to g gate pulses GP overlap.

However, when the nth to gth gate pulses GP of the nth to gth gate signals VGn to VGg used for driving the organic light emitting diodes of the camera region are formed in the form as shown in FIG. 7. , In the camera mode of the organic light emitting display device according to the present invention, the camera mode emission turnoff pulse (Yoff) of the camera mode emission signal (EM_camera) used for driving the organic light emitting diodes of the camera area is the n th to n th The g gate pulses GP are overlapped.

Accordingly, the width of the camera mode emission turnoff pulse Yoff should be substantially larger than a period in which all of the nth to gth gate pulses GP are output.

As described above, as the pulse width of the camera mode emission turn-off pulse Yoff increases, the pulse width of the camera mode emission turn-on pulse Yon allowing current to flow to the camera region organic light emitting diodes is , It is reduced than the width of the display mode emission turn-on pulse (Yon '). Therefore, the light emission period of the camera region organic light emitting diodes in the camera mode is shorter than the light emission period of the camera region organic light emitting diodes in the display mode.

In this case, an area in which the pulse width of the camera mode emission turnoff pulse Yoff is increased may be a front end of the display mode emission turnoff pulse Yoff ', or as illustrated in FIG. 7, It may be a rear end of the display mode emission turnoff pulse Yoff '.

In other words, the camera region organic light emitting diodes simultaneously emit light by the camera mode emission turn-on pulses that turn on the camera region emission transistors, and the camera mode emission turn-on pulses turn the camera mode emission turn. After the off pulses are output, they are supplied to the emission transistors.

The area in which the pulse width of the camera mode emission turnoff pulse Yoff is increased and the magnitude of the increase may be variously changed according to the structure of the stages and the order in which the camera mode emission signals EMcamera are output. .

8 is a waveform diagram showing emission signals applied to the camera mode of the organic light emitting display device according to the present invention, and FIG. 9 is another view showing emission signals applied to the camera mode of the organic light emitting display device according to the present invention It is a waveform diagram. In the following description, contents identical or similar to those described with reference to FIGS. 1 to 7 are omitted or simply described.

As described above, the control signal generator 420 generates the camera mode emission clocks in the camera mode and transmits them to the gate driver 200, and the gate driver 200 emits the camera mode em The camera mode emission signal including the camera mode emission turn-off pulse and the camera mode emission turn-on pulse is generated using option clocks.

However, in the camera mode, not only the camera mode emission signal is generated.

That is, even in the camera mode, the display mode emission signals may be transmitted to display area emission transistors for adjusting the light emission period of the display area organic light emitting diodes provided in the boundary area AA2 and the main area AA3. have.

For example, in the camera mode, the width of the emission turn-off pulses X of all the emission signals EM1 to EMg generated in the gate driver is in the display mode, as shown in FIG. 8. It may be larger than the width of the display mode emission turnoff pulses Yoff 'to turn off the camera area emission transistors, and in particular, it is formed to be larger than a period during which all of the nth to gth gate pulses GP are output. .

Accordingly, in the camera mode, the controller 400 may form only the camera mode emission signals EM1 to EMg using the camera mode emission clocks.

In this case, in the overlapping region Y in which the camera mode emission turnoff pulses EMn to EMg used for driving the organic light emitting diodes of the camera region overlap, all of the organic light emitting diodes of the camera region output light. I never do that. Therefore, in the overlapping area X, the shutter of the camera is opened so that an image can be captured.

In addition, in the camera mode, the emission turn-off pulse of the emission signals EMn to EMg used for driving the organic light emitting diodes of the camera area among the emission signals EM1 to EMg generated by the gate driver ( The width of X2) may be larger than the width of the display mode emission turnoff pulses Yoff 'that turn off the camera region emission transistors in the display mode, as shown in FIG. 9. It is formed larger than a period in which all of the n to g gate pulses GP are output.

In this case, in the overlapping region Y in which the camera mode emission turnoff pulses EMn to EMg used for driving the organic light emitting diodes of the camera region overlap, all of the organic light emitting diodes of the camera region output light. I never do that. Therefore, in the overlapping area X, the shutter of the camera is opened so that an image can be captured.

However, in the camera mode, emission turn-off of the emission signals EM1 to EMn-1 used for driving the display region organic light emitting diodes among the emission signals EM1 to EMg generated in the gate driver. 9, the width of the pulses X1 may be formed to be the same as the width of the display mode emission turnoff pulses Yoff 'that turn off the camera region emission transistors in the display mode. .

Accordingly, the controller 400 generates the display mode emission signals EM1 to EMn-1 using the display mode emission clock in the camera mode, and then uses the camera mode emission clock. The camera mode emission signals EMn to EMg may be generated.

In this case, as illustrated in FIG. 8, in the camera mode, when the width of all emission turnoff pulses X is increased, the luminance of the entire image of the display area AA may be lowered. In this case, the control unit compensates for all camera input image data Camera_i transmitted from the camera 500 using a compensation value, and generates the camera image data to generate an image of the image output to the display area AA. Brightness can be increased.

10 is a cross-sectional view of an organic light emitting display panel applied to an organic light emitting display device according to the present invention, in particular, a cross-sectional view showing an organic light emitting diode (OLED) and a driving transistor (Tdr). FIG. 11 is an exemplary view schematically showing an enlarged area 'C' shown in FIG. 1.

Each pixel 110 of the organic light emitting display panel 100 applied to the present invention is provided with an organic light emitting diode (OLED) and a pixel driving circuit (PDC) driving the organic light emitting diode (OLED) as described above. do.

The driving circuit Tdr, the switching transistor Tsw1, the emission transistor Tsw3, and the sensing transistor Tsw2 are provided in the pixel driving circuit PDC, and various signals are supplied to the transistors. In order to do this, the gate line GL, the data lines DL, the sensing pulse line SPL, the sensing line SL, the first driving power line PLA, and the second driving power line ( PLB) and the emission line EL.

The organic light emitting diode OLED emits light corresponding to the amount of current transmitted through the driving transistor Tdr.

To this end, the organic light emitting diode (OLED), in particular, the anode of the organic light emitting diode (OLED), as shown in Figure 10, through the connection line 112 and one terminal of the driving transistor (Tdr) connected. In FIG. 10, the connection line 112 is illustrated in a direction perpendicular to the front and rear surfaces of the organic light emitting display panel, but the connection line 112 is in addition to a direction perpendicular to the front and rear surfaces of the organic light emitting display panel. 11, the first direction of the organic light emitting display panel 100 may be formed in a direction parallel to the data line DL.

In the boundary area AA2 and the main area AA3, the display area organic light emitting diode (OLED_display) and the pixel driving circuit (PDC) are adjacent.

For example, as illustrated in FIG. 11, in the boundary area AA2, a pixel driving circuit (PDC) for driving the display area organic light emitting diodes (OLEDs) and the display area organic light emitting diodes (OLED_displays). Are adjacent.

However, in the camera area AA1, only the camera area organic light emitting diodes (OLED_cameras) are provided, and the camera area pixel driving circuits 114 for driving the camera area organic light emitting diodes (OLED_cameras) are in the boundary area. (AA2).

The reason why the pixel driving circuits 114 of the camera area are provided in the boundary area AA2 is to increase the transparency of the camera area AA1 so that more external light enters the camera 500. .

In more detail, the camera area AA1 of the organic light emitting display panel 100 has the external light flowing from the front of the organic light emitting display panel 100 through the organic light emitting display panel 100. 500) is formed to be transparent.

In particular, the camera area AA1 is provided between the light emitting areas provided with the camera area organic light emitting diodes (OLED_camera) and the light emitting areas to output an image from the front of the organic light emitting display panel 100. It includes transmission regions 113 that transmit incident external light to the camera 500 provided on the rear surface of the organic light emitting display panel 100.

That is, the camera area AA1 is provided with the light-transmitting area 113 and the light-emitting area in which the camera area organic light-emitting diodes (OLED_carmera) are provided to allow external light to enter the camera 500, and The camera area pixel driving circuit 114 driving the camera area organic light emitting diodes (OLED_cameras) is provided in a boundary area AA2 adjacent to the camera area AA1 among the display areas AA.

In this case, the camera area pixel driving circuit 114 provided in the boundary area AA2 is connected to the camera area organic light emitting diode (OLED_camera) through a connection line 112.

Accordingly, a plurality of signal lines connected to the camera area pixel driving circuit 114 and the camera area pixel driving circuit 114 may be omitted in the camera area AA1, and the camera area pixel driving circuit 114 and The transmission area 113 may be provided in an area where the signal lines are omitted.

That is, since the camera area AA1 is provided with only the camera area organic light emitting diodes (OLED_cameras) and the connection lines 112, the remaining areas can be used as the transmission area 113. The wider the transmissive area 113 is, the larger the amount of light entering the camera 500 may be, and thus, a brighter and brighter camera image may be generated from the camera.

Hereinafter, a driving method of the organic light emitting display device according to the present invention will be described. In the following description, contents identical or similar to those described above are omitted or briefly described.

First, if a signal indicating the camera mode is not transmitted from the external system 800, that is, if an application controlling the camera 500 is not executed in the electronic device, the control unit sets the current mode to the display mode. Recognize.

In this case, the control unit 400 generates at least one display mode emission clock and transmits it to the gate driver 200. The gate driver 200 generates the display mode emission signals using the display mode emission clock, and then transmits the display mode emission signals to the emission lines EL.

Accordingly, the emission transistors Tsw3 are sequentially turned on, and the organic light emitting diodes sequentially output light.

Second, when the electronic device is driven in the display mode, when the user executes the application, the external system 800 generates a camera driving signal and transmits it to the controller 400.

When the camera driving signal is received from the external system 800, the control unit 400 transmits the camera mode start signal informing the camera mode to the external system 800 after driving the camera.

Accordingly, the external system 800 and the control unit 400 are driven in synchronization with each other.

The user selects a camera driving button provided in the electronic device at a timing to take a picture with the camera 500.

In this case, if the external system 800 knows the timing at which the organic light emitting diodes of the camera region do not emit light, the external system 800 receives the camera signal at the timing at which the organic light emitting diodes of the camera region do not emit light. It transmits to the control unit 400.

When the camera photographing signal is received at a timing when the organic light emitting diodes of the camera area do not emit light from the external system 800, the controller 400 controls the camera 500 to open the shutter of the camera.

Here, the timing at which the organic light emitting diodes of the camera area do not emit light means the overlapping area Y shown in FIGS. 8 and 9.

That is, in the camera mode in which the camera is driven, the controller 400 displays the light emission periods of the organic light emitting diodes of the camera area provided in the camera area among the organic light emitting diodes of the organic light emitting display panel 100, The reduction is made using the method as described with reference to FIGS. 7 to 9. In addition, when the camera photographing signal is received from the external system 800, the control unit 400 does not emit light from the camera region organic light emitting diodes, that is, in the overlap region Y, the shutter of the camera The camera 500 is controlled to open.

Information about the image taken by opening the shutter, that is, the camera input image data (Camera_i) is transmitted to the control unit 400 and may also be transmitted to the external system 800.

In addition, in the camera mode, the controller 400 controls the camera 500 to open the shutter of the camera in the overlapping area Y even when the camera photographing signal is not received, and the shutter is opened Information about the image that was taken and taken, that is, the camera input image data Camera_i is transmitted to the controller 400.

The control unit 400 converts the camera input image data to the image data (Data) and transmits it to the data driver 300, the data driver 300 converts the image data (Data) to the data voltage It is converted and supplied to the data lines.

Accordingly, even in the camera mode, images photographed by the camera 500 may be output through the entire display area AA including the camera area AA1.

Third, when the electronic device is driven in the display mode, when the user executes the application, the external system 800 generates a camera driving signal and transmits it to the controller 400.

When the camera driving signal is received from the external system 800, the control unit 400 transmits the camera mode start signal informing the camera mode to the external system 800 after driving the camera.

Accordingly, the external system 800 and the control unit 400 are driven in synchronization with each other.

The user selects a camera driving button provided in the electronic device at a timing to take a picture with the camera 500.

In this case, if the external system 800 does not know the timing at which the organic light emitting diodes of the camera area do not emit light, the external system 800 immediately receives the camera photographing signal when the camera driving button is selected. ).

When the camera photographing signal is received from the external system, the controller 400 adjusts the camera so that the shutter of the camera is opened in the overlapping region Y at the timing at which the organic light emitting diodes of the camera region do not emit light. Control.

That is, in the second method, since the external system 800 knows the overlapping region Y, the camera photographing signal is transmitted to the control unit 400 at a timing corresponding to the overlapping region Y, The controller 400 may control the camera 500 to open the shutter of the camera according to the camera shooting signal.

However, in the third method, since the external system 800 does not know the overlapping area Y, the control unit 400 may transmit the camera photographing signal from the external system 800 to the overlapping area. In (Y), the camera 500 may be controlled to open the shutter of the camera.

That is, according to the present invention as described above, at a timing when the shutter of the camera is opened, an image is not output from the camera area AA1, and accordingly, more external light is introduced into the camera 500 , A clear image can be obtained.

Those skilled in the art to which the present invention pertains will appreciate that the present invention may be implemented in other specific forms without changing its technical spirit or essential characteristics. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. do.

100: organic light emitting display panel 200: gate driver
300: data driver 400: control unit
500: camera 800: external system

Claims (10)

An organic light emitting display panel including a display area where an image is output and a non-display area provided outside the display area;
A camera provided on a rear surface of the organic light emitting display panel, provided in a camera area formed at one end of the display area, and photographing a front direction of the organic light emitting display panel;
A gate driver sequentially supplying gate pulses to gate lines provided in the organic light emitting display panel;
A data driver supplying data voltages to data lines provided on the organic light emitting display panel; And
It includes a control unit for controlling the driving of the camera, the gate driver, the data driver,
In the camera mode in which the camera is driven, the control unit decreases the light emission period of the organic light emitting diodes provided in the camera area among the organic light emitting diodes provided in the organic light emitting display panel, and the camera shooting signal from an external system. When received, an organic light emitting display device that controls the camera to open the shutter of the camera at a timing when the organic light emitting diodes of the camera area do not emit light. According to claim 1,
The organic light emitting display device in which the gate pulse is sequentially supplied from a gate line provided on the other side of the display area to a gate line provided on the one side of the display area. According to claim 1,
In the camera mode, the width of the camera mode emission turnoff pulses that turn off the camera area emission transistors that allow current to flow to the camera area organic light emitting diodes is the camera area emmi in a display mode other than the camera mode. An organic light emitting display device in which the light emission period of the organic light emitting diodes in the camera area is reduced by increasing the width of the display mode emission turnoff pulses that turn off the option transistors. The method of claim 3,
The camera region organic light emitting diodes simultaneously emit light by camera mode emission turn-on pulses that turn on the camera region emission transistors,
The organic light emitting display device wherein the camera mode emission turn-on pulses are supplied to the emission transistors after the camera mode emission turn-off pulses are output. The method of claim 3,
The control unit,
In the camera mode, the camera mode emission clocks to increase the width of the camera mode emission turnoff pulses are transmitted to the gate driver, and the gate driver uses the camera mode emission clocks to generate the camera mode emission. After generating turnoff pulses, the organic light emitting display device transmits the camera mode emission turnoff pulses to the camera area emission transistors. According to claim 1,
The control unit,
In the camera mode, image data is generated by increasing the luminance of input image data corresponding to the camera region organic light emitting diodes, and the image data is transmitted to the data driver, so that the organic light emitting diode according to a decrease in light emission period An organic light emitting display device that compensates for the decrease in luminance of the people. According to claim 1,
The control unit,
In the camera mode, image data corresponding to the organic light emitting diodes provided in the display area including the camera area is generated and transmitted to the data driver,
The data driver,
An organic light emitting display device that outputs an image to the display area by supplying data voltages corresponding to the image data to the data lines. According to claim 1,
The camera area is transparently formed to allow external light to enter the camera,
In the camera area, the camera area organic light emitting diodes are provided,
An organic light emitting display device comprising a camera area pixel driving circuit driving the camera area organic light emitting diodes in a boundary area adjacent to the camera area among the display areas. According to claim 1,
The control unit,
When a camera driving signal is received from the external system, after driving the camera, a camera mode start signal informing the camera mode is transmitted to the external system,
An organic light emitting display device that controls the camera to open the shutter of the camera when the camera photographing signal is received at a timing when the organic light emitting diodes of the camera area do not emit light from the external system. According to claim 1,
The control unit,
When a camera driving signal is received from the external system, after driving the camera, a camera mode start signal informing the camera mode is transmitted to the external system,
When the camera photographing signal is received from the external system, the organic light emitting display device controls the camera to open the shutter of the camera at a timing when the organic light emitting diodes of the camera area do not emit light.

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