Light-emitting display device

Abstract

To provide a light-emitting display device which allows a scaler to deactivate a deterioration prevention function of a control driver on the basis of analysis results of input image data after the deterioration prevention function starts in the control driver.SOLUTION: A light-emitting display device according to an embodiment of the present invention comprises a control driver configured to perform a deterioration prevention function, a scaler configured to transfer a deterioration prevention function activation request signal to the control driver and transfer a deterioration prevention function deactivation request signal to the control driver based on an analysis result of input image data when deterioration prevention function start information is received from the control driver, and a light-emitting display panel configured to display images under the control of the control driver.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present specification relates to a light emitting display device. [Background technology]

[0002] The light emitting display device is installed in electronic products such as televisions, monitors, notebook computers, smartphones, tablet computers, electronic pads, wearable devices, watch phones, portable information devices, navigation systems, and vehicle control display devices to display images.

[0003] That is, the light emitting display device can be used as a television, a monitor, or various other types of electronic products. In some cases, the light emitting display device can be used as multiple devices such as a television and a monitor. However, when the display device is used in various ways, some constraints related to the performance of the display device may occur. Summary of the Invention [Problem to be solved by the invention]

[0004] When a light emitting display device is used for a long time, the performance of the light emitting display device may be degraded due to degradation of the light emitting elements. To prevent this, various types of degradation prevention functions are used in the light emitting display device to prevent degradation of the light emitting elements. For example, when a still image is continuously output, a method of gradually reducing the brightness of the still image and a method of reducing the brightness of an area where a logo is displayed are used. Such functions are performed by a control driver of the light emitting display device.

[0005] The inventors of the present specification have recognized a problem that when a light emitting display device manufactured for a television is used for a monitor, it is difficult to apply the deterioration prevention function that has been used conventionally.

[0006] That is, in a light-emitting display device manufactured for a television, small movements such as those of a mouse cursor are ignored, so even if the user moves the mouse cursor after the brightness of the light-emitting display panel has been reduced by the deterioration prevention function, the brightness of the light-emitting display panel is not changed to normal brightness.

[0007] Therefore, the inventors of the present specification have invented a structure that can prevent performance degradation of a light-emitting display device due to deterioration of light-emitting elements, and in particular, have invented a light-emitting display device that can be used in combination as a television and a monitor and can normally perform the deterioration prevention function.

[0008] The problem to be solved by one embodiment of this specification is to provide an emissive display device in which, when an anti-deterioration function is initiated in a control driver, a scaler can disable the anti-deterioration function of the control driver depending on the analysis results of the input video data. [Means for solving the problem]

[0009] An emissive display device according to one embodiment of the present specification includes a control driver that performs an anti-deterioration function, a scaler that transmits an anti-deterioration function activation request signal to the control driver and, upon receiving anti-deterioration function start information from the control driver, transmits an anti-deterioration function disable request signal to the control driver according to an analysis result of input image data, and an emissive display panel that outputs an image under the control of the control driver.

[0010] Specific matters according to various examples of the present specification other than the means for solving the problems mentioned above are included in the following description and drawings.

[0011] According to one embodiment of the present disclosure, the anti-degradation function of a control driver can be disabled without modifying the structure and functionality of the control driver on which the anti-degradation function is implemented.

[0012] Therefore, a light-emitting display device equipped with a control driver designed to ignore small movements such as those of a mouse cursor can be used as a monitor.

[0013] That is, according to an embodiment of the present specification, the light emitting display device manufactured as a television and having a deterioration prevention function can also be used as a monitor and various other types of electronic devices.

[0014] Furthermore, according to this specification, the luminance of the light-emitting display device can be reduced by the deterioration prevention function, and thus a low-power light-emitting display device can be provided. [Brief description of the drawings]

[0015] [Figure 1] 1 is a diagram illustrating a configuration of a light-emitting display device according to the present specification; [Diagram 2] 1 is a diagram illustrating an example of a pixel structure applied to a light emitting display device according to the present specification; [Diagram 3] 13 is an exemplary diagram showing a structure of a control driver applied to another light emitting display device of the present specification; [Figure 4] 1 is a diagram illustrating an example of a structure of a scaler applied to a light emitting display device according to the present specification; [Diagram 5] 2 is an exemplary diagram illustrating a structure of a gate driver applied to a light emitting display device according to an embodiment of the present disclosure; [Figure 6] 1 is an exemplary diagram illustrating a structure of a data driver applied to a light emitting display device according to an embodiment of the present disclosure; [Figure 7] 1 is an exemplary diagram illustrating a method of driving a light emitting display according to an embodiment of the present disclosure; [Figure 8A] 4 is an exemplary diagram illustrating signals transmitted between a scaler and a control driver in a light emitting display device according to an embodiment of the present disclosure; [Figure 8B] 4 is an exemplary diagram illustrating signals transmitted between a scaler and a control driver in a light emitting display device according to an embodiment of the present disclosure; [Figure 8C] 4 is an exemplary diagram illustrating signals transmitted between a scaler and a control driver in a light emitting display device according to an embodiment of the present disclosure; [Figure 9] 1 is an exemplary view showing a light emitting display panel which is applied to a light emitting display device according to an embodiment of the present disclosure; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The advantages and features of the present specification, as well as the methods for achieving them, will become apparent from the following detailed description of the embodiments in conjunction with the accompanying drawings. However, the present specification is not limited to the embodiments disclosed below, and may be embodied in various different forms, and the embodiments are provided solely for the purpose of making the disclosure of the present specification complete and fully conveying the scope of the invention to those skilled in the art to which the present specification pertains.

[0017] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the figures for explaining the embodiments of this specification are illustrative, and the specification is not limited to the matters shown in the figures. The same reference numbers refer to the same components throughout the specification. In addition, in the description of this specification, if it is determined that a specific description of related known technology may unnecessarily obscure the gist of this specification, the detailed description will be omitted. When "including," "having," "consisting of," etc. are used in this specification, other parts may be added unless "only" is used. When a component is expressed in the singular, it includes the case where it includes a plurality, unless otherwise expressly stated.

[0018] In interpreting elements, an error range is to be interpreted as being included even if there is no separate explicit description of the error range.

[0019] When the description is of a positional relationship, for example when the positional relationship of two parts is described using "above", "at the top", "below", "beside", etc., one or more other parts can be located between the two parts, unless, for example, "immediately" or "directly" is used.

[0020] When describing a temporal relationship, when the temporal precedence is described using "after", "following", "next to", "before", etc., it can also include cases where the relationship is not consecutive, unless "immediately" or "directly" is used.

[0021] Although the terms "first", "second" and the like are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component referred to below may also be the second component within the technical concept of this specification.

[0022] In describing components of the present application, terms such as first, second, A, B, (a), (b), etc. may be used. Such terms are merely intended to distinguish the components from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "coupled," "connected," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that other components may be "intervening" between each component that is indirectly connected or connected, unless otherwise expressly stated.

[0023] "At least one" should be understood to include all combinations of one or more of the associated elements. For example, the meaning of "at least one of the first, second, and third elements" can mean not only the first, second, or third elements, but also all combinations of two or more of the first, second, and third elements.

[0024] The features of the various embodiments of the present specification may be partially or fully combined or combined with each other, and may be technically linked and driven in various ways, and each embodiment may be implemented independently of each other or may be implemented together in relation to each other.

[0025] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The scales of the components shown in the drawings are different from the actual scales for convenience of explanation, and therefore are not limited to the scales shown in the drawings.

[0026] FIG. 1 is an exemplary diagram showing the configuration of a light emitting display device according to the present specification, FIG. 2 is an exemplary diagram showing the structure of a pixel applied to a light emitting display device according to the present specification, FIG. 3 is an exemplary diagram showing the structure of a control driver applied to another light emitting display device according to the present specification, FIG. 4 is an exemplary diagram showing the structure of a scaler applied to a light emitting display device according to the present specification, FIG. 5 is an exemplary diagram showing the structure of a gate driver applied to a light emitting display device according to one embodiment of the present specification, and FIG. 6 is an exemplary diagram showing the structure of a data driver applied to a light emitting display device according to one embodiment of the present specification.

[0027] The light emitting display device according to the present specification can be used as various electronic devices. The electronic devices can be, for example, televisions and monitors. For example, the light emitting display device can be an electronic device (e.g., a smart television) that provides a display function (e.g., as a monitor or screen). For example, a user can connect his / her laptop or smartphone to the light emitting display device and use the light emitting display device as the screen of the laptop or smartphone. In addition, the light emitting display device can be flexible and can provide various functions including a touch function.

[0028] As shown in FIGS. 1 and 2, the light emitting display device according to the present specification includes a light emitting display panel 100 including a display area (DA) where an image is output and a non-display area (NDA) provided on the periphery of the display area (DA), a gate driver 200 that supplies gate signals (GS) to gate lines (GL1 to GLg) provided in the display area (DA) of the light emitting display panel 100, a data driver 300 that supplies data voltages (Vdata) to data lines (DL1 to DLd) provided in the light emitting display panel 100, a control driver 400 that controls driving of the gate driver 200 and the data driver 300, a scaler 600 that converts image information received through a communication network into input image data that the control driver 400 can recognize, and a power supply unit 500 that supplies power to the control driver 400, the gate driver 200, the data driver 300, and the light emitting display panel 100.

[0029] First, the light-emitting display panel 100 includes a display area (DA) and a non-display area (NDA). The display area (DA) includes gate lines (GL1 to GLg), data lines (DL1 to DLd), and pixels (P). Therefore, an image is output in the display area (DA). g and d are natural numbers. The non-display area (NDA) surrounds the outer periphery of the display area (DA).

[0030] Each pixel (P) of the light emitting display panel (100) of Fig. 1 may have the configuration shown in Fig. 2, but may have a different configuration. The pixel (P) provided in the light emitting display panel 100 may include a pixel driving circuit (PDC) including a switching transistor (Tsw1), a storage capacitor (Cst), a driving transistor (Tdr) and a sensing transistor (Tsw2), and a light emitting element (ED) connected to the pixel driving circuit (PDC), as shown in Fig. 2. The light emitting element (ED) may be an organic light emitting diode.

[0031] A first terminal of the driving transistor Tdr may be connected to a high voltage line 30 to which a high voltage EVDD is supplied, and a second terminal of the driving transistor Tdr may be connected to the light emitting element ED.

[0032] A first terminal of the switching transistor (Tsw1) is connected to the data line (DL), a second terminal of the switching transistor (Tsw1) is connected to the gate of the driving transistor (Tdr), and the gate of the switching transistor (Tsw1) can be connected to the gate line (GL).

[0033] A data voltage (Vdata) is supplied from the data driver 300 through a data line (DL). A gate signal (GS) is supplied from the gate driver 200 through a gate line (GL). The gate signal (GS) includes a gate pulse (GP) for turning on the switching transistor (Tsw1) and a gate-off signal for turning off the switching transistor (Tsw1).

[0034] A sensing transistor (Tsw2) may be provided to measure a threshold voltage or mobility of the driving transistor (Tdr) or to supply a reference voltage (Vref) to the pixel driving circuit (PDC). A first terminal of the sensing transistor (Tsw2) is connected to a second terminal of the driving transistor (Tdr) and the light emitting element (ED), a second terminal of the sensing transistor (Tsw2) is connected to a sensing line (SL) to which the reference voltage (Vref) is supplied, and a gate of the sensing transistor (Tsw2) may be connected to a sensing control line (SCL) to which a sensing control signal (SCS) is supplied.

[0035] The sensing line (SL) may be connected to the data driver 300, and may be connected to the power supply unit 500 through the data driver 300. That is, the reference voltage (Vref) provided from the power supply unit 500 may be provided to the pixel (P) through the sensing line (SL), and the data sensing signal transmitted from the pixel (P) may be processed by the data driver 300.

[0036] The light emitting element (ED) includes a first electrode to which a first voltage (EVDD) is supplied through a driving transistor (Tdr), a second electrode connected to a second voltage supply line (PLB) to which a second voltage (EVSS) is supplied, and an emission layer provided between the first electrode and the second electrode.

[0037] The structure of the pixel (P) applied in this specification is not limited to the structure shown in Fig. 2. Therefore, the structure of the pixel (P) can be changed into various forms.

[0038] Next, the control driver 400 can realign the input image data (Ri, Gi, Bi) transmitted from the scaler 600 using the timing synchronization signal (TSS) transmitted from the scaler 600, and can generate driver control signals (GCS, DCS) to be supplied to the data driver 300 and the gate driver 200.

[0039] To this end, as shown in FIG. 3, the control driver 400 may include a data aligner 430 for realigning input image data (Ri, Gi, Bi) to generate image data (Data) and supplying the image data (Data) to the data driver 300, a control signal generator 420 for generating a gate control signal (GCS) and a data control signal (DCS) using a timing synchronization signal (TSS), a control unit 410 for receiving the timing synchronization signal (TSS) and the input image data (Ri, Gi, Bi) from the scaler 600 and transmitting them to the data aligner 430 and the control signal generator 420, and an output unit 440 for supplying the image data (Data) generated by the data aligner 430 and the data control signal (DCS) generated by the control signal generator 420 to the data driver 300 and supplying the gate control signal (GCS) generated by the control signal generator 420 to the gate driver 200.

[0040] The control signal generator 420 can also generate a power control signal to be supplied to the power supply unit 500 .

[0041] The control driver 400 may further include a storage unit for storing various information. The storage unit may be included in the control driver 400, or may be provided separately from the control driver 400.

[0042] In particular, the control driver 400 applied herein can perform various types of anti-degradation functions.

[0043] For example, the control driver 400 can perform a TPC (Temporal Peak Luminance Control) function that can reduce the luminance of light output from a light-emitting display panel when a still image is output through the light-emitting display panel.

[0044] To this end, the control unit 410 of the control driver 400 analyzes the input image data (Ri, Gi, Bi) and determines whether the input image data (Ri, Gi, Bi) corresponding to a still image is input for a preset period. Here, a still image means an image output from a light-emitting display panel, and in particular, a still image as shown in the figure. That is, since an image is output from the light-emitting display panel according to the input image data (Ri, Gi, Bi), a still image can be determined by analyzing the input image data (Ri, Gi, Bi).

[0045] When it is determined that the input image data (Ri, Gi, Bi) corresponding to a still image is input as a result of analyzing the input image data (Ri, Gi, Bi) included in at least two frames, the control unit 410 controls the data alignment unit 430 to reduce the luminance value of each of the input image data (Ri, Gi, Bi). The image data (Data) with reduced luminance value is transmitted to the data driver 300, where the image data (Data) is converted into a data voltage (Vdata) and supplied to the pixel (P) provided in the light emitting display panel 100.

[0046] When the luminance value of each image data (Data) is reduced, the current supplied to the light emitting element (ED) included in the pixel (P) can be reduced, and thus the luminance of the light output from the light emitting element (ED) can be reduced, and therefore the luminance of the still image output from the light emitting display panel 100 can be reduced.

[0047] When the current supplied to the light emitting element (ED) is reduced and the brightness of the light output from the light emitting element (ED) is reduced, the rate at which the light emitting element (ED) deteriorates can be slowed down.

[0048] Therefore, the degradation rate of the light emitting device (ED) can be slowed down by the above-mentioned (TPC) function, and thus degradation of the quality of the light emitting display device due to degradation of the light emitting device (ED) can be prevented.

[0049] In addition, when it is determined as a result of analyzing the input image data (Ri, Gi, Bi) included in at least two frames that the input image data (Ri, Gi, Bi) corresponding to a still image has been input for a preset period, the control unit 410 may control the power supply unit 500 to reduce the magnitude of the first voltage (EVDD) supplied to the pixel (P).

[0050] When the magnitude of the first voltage (EVDD) is reduced, the magnitude of the current supplied to the pixel (P) can be reduced overall, and therefore the current supplied to the light emitting element (ED) can be reduced, and the brightness of the light output from the light emitting element (ED) can be reduced, thereby slowing down the rate at which the light emitting element (ED) deteriorates.

[0051] Therefore, the degradation rate of the light emitting device (ED) can be slowed down by the above-mentioned (TPC) function, and thus degradation of the quality of the light emitting display device due to degradation of the light emitting device (ED) can be prevented.

[0052] In addition, the control driver 400 may also execute a logo detection algorithm (LEA) function that, when a logo is output on the light-emitting display panel, reduces the brightness of the light output in an area corresponding to the logo.

[0053] To this end, the control unit 410 of the control driver 400 analyzes the input image data (Ri, Gi, Bi) and determines whether the input image data (Ri, Gi, Bi) corresponding to an image including a logo is input. Here, the logo may be a still image formed of characters or figures, etc., that does not change for a long time. The image including a logo means an image output from the light-emitting display panel. That is, since an image is output from the light-emitting display panel according to the input image data (Ri, Gi, Bi), the image including a logo can be determined by analyzing the input image data (Ri, Gi, Bi). That is, if the input image data (Ri, Gi, Bi) corresponding to a pixel (P) corresponding to a specific region of the light-emitting display panel 100 does not change continuously, the control unit 410 can determine that a logo is displayed in the specific region.

[0054] When it is determined that the input image data (Ri, Gi, Bi) corresponding to an image including a logo is input as a result of analyzing the input image data (Ri, Gi, Bi) included in at least two frames, the control unit 410 controls the data alignment unit 430 to reduce the luminance value of each of the input image data (Ri, Gi, Bi) corresponding to the logo. The image data (Data) with reduced luminance value is transmitted to the data driver 300, where the image data (Data) is converted into a data voltage (Vdata) and supplied to the pixel (P) provided in the light emitting display panel 100.

[0055] When the luminance value of each of the image data (Data) corresponding to the logo is reduced, the current supplied to the light emitting element (ED) provided in the pixel (P) corresponding to the logo can be reduced, and thus the luminance of the light output from the light emitting element (ED) corresponding to the logo can be reduced. Therefore, the luminance of the logo output from the light emitting display panel 100 can be reduced.

[0056] When the current supplied to the light emitting element (ED) corresponding to the logo is reduced and the brightness of the light output from the light emitting element (ED) corresponding to the logo is reduced, the deterioration rate of the light emitting element (ED) corresponding to the logo can be slowed down. When the deterioration rate of the light emitting element (ED) provided in a specific region of the light emitting display panel 100 is reduced, the overall deterioration rate of the light emitting display device can be reduced.

[0057] Therefore, the degradation rate of the light emitting element (ED) can be slowed down by the above-mentioned (LEA) function, and thus degradation of the quality of the light emitting display device due to degradation of the light emitting element (ED) can be prevented.

[0058] In addition to the (TPC) function and (LEA) function described above, the control driver 400 can perform at least one of various types of degradation prevention functions currently in use. Furthermore, the characteristics of this specification do not lie in the degradation prevention functions themselves executed by the control driver 400 or in the structure of the control driver 400 therefor. Therefore, detailed descriptions of each of the degradation prevention functions and the structure and functions of the control driver 400 therefor will be omitted.

[0059] The scaler 600 then performs the functions of driving the control driver 400 and the electronics.

[0060] For example, if the electronic device is a television (TV), the scaler 600 can receive various types of audio information, video information, and text information through a communication network, and can transmit the received video information to the control driver 400 .

[0061] In addition, if the electronic device is a monitor, the scaler 600 can receive image information through a communication network connected to a computer, convert the received image information into input image data (Ri, Gi, Bi) and transmit it to the control driver 400.

[0062] That is, the scaler 600 can convert the image information received through the communication network into a signal that can be recognized by the control driver 400. In this case, the signal that can be recognized by the control driver 400 can be input image data (Ri, Gi, Bi). That is, the scaler 600 can convert the image information into the input image data (Ri, Gi, Bi) and transmit the input image data (Ri, Gi, Bi) to the control driver 400.

[0063] In particular, the scaler 600 may transmit an anti-degradation function activation request signal (ARS) to the control driver 400 performing the anti-degradation function. When the anti-degradation function activation request signal (ARS) is received from the scaler 600, the control driver 400 may perform the anti-degradation function as described above to prevent degradation of the light emitting display device.

[0064] When the degradation prevention function is activated, the control driver 400 analyzes the input image data (Ri, Gi, Bi). When the control driver 400 receives the input image data (Ri, Gi, Bi) corresponding to a still image as described above, the control driver 400 can reduce the brightness of the entire pixel (P) and can reduce the brightness of the pixel (P) in the corresponding area.

[0065] When the luminance of the entire pixel (P) or the luminance of the pixel (P) corresponding to the logo decreases, the control driver 400 transmits an anti-degradation function onset signal (ONS) to the scaler 600 .

[0066] That is, when the degradation prevention function is activated in the control driver 400 in response to the degradation prevention function activation request signal (ARS) received from the scaler 600, the control driver 400 analyzes the input image data (Ri, Gi, Bi). If the luminance of the entire pixel (P) or the luminance of the pixel (P) corresponding to the logo decreases according to the analysis result, the control driver 400 transmits degradation prevention function start information (ONS) to the scaler 600. The degradation prevention function start information (ONS) may be generated by the control unit 410. The degradation prevention function start information (ONS) may include information or a signal indicating that the degradation prevention function has been activated or the type of the activated degradation prevention function.

[0067] When the degradation prevention function onset signal (ONS) is received from the control driver 400, the scaler 600 transmits a degradation prevention function disable request signal (DARS) to the control driver 400 according to the analysis result of the input video data (Ri, Gi, Bi).

[0068] To this end, as shown in FIG. 4, the scaler 600 includes an image information receiving unit 610 that receives image information, a conversion unit 620 that converts the image information into input image data (Ri, Gi, Bi), and an analysis unit 630 that transmits an anti-degradation function activation request signal (ARS) to the control driver 400 and, upon receiving anti-degradation function onset information (ONS) from the control driver 400, transmits an anti-degradation function disable request signal (DARS) to the control driver 400 depending on the analysis result of the input image data (Ri, Gi, Bi).

[0069] The receiving unit 610 can receive the image information from the communication network as described above. For example, if the electronic device is a television (TV), the scaler 600 can receive the image information through the communication network, and if the electronic device is a monitor, the scaler 600 can receive the image information through a communication network connected to a computer.

[0070] The converter 620 can convert the image information into input image data (Ri, Gi, Bi) and transmit the input image data (Ri, Gi, Bi) to the control driver 400 .

[0071] The converter 620 can generate a timing synchronization signal (TSS) and transmit it to the control driver 400 .

[0072] The analysis unit 630 supplies power to the light emitting display device, and when the control driver 400 is driven, generates an anti-deterioration function activation request signal (ARS) and transmits it to the control driver 400. This enables the control driver 400 to perform the anti-deterioration function.

[0073] When the degradation prevention function start information (ONS) is received from the control driver 400, the analyzer 630 analyzes the input image data (Ri, Gi, Bi). In this case, the analyzer 630 can analyze the input image data (Ri, Gi, Bi) generated by the converter 620, but can also analyze image information transmitted from the receiver 610. Hereinafter, for convenience of explanation, the scaler 600 that analyzes the input image data (Ri, Gi, Bi) generated by the converter 620 will be described as an example of the light emitting display device according to the present specification.

[0074] When the analysis unit 630 determines, as a result of analyzing the input image data (Ri, Gi, Bi), that it is necessary to increase the image brightness that has been reduced by the degradation prevention function to the normal brightness, it transmits a degradation prevention function disable request signal (DARS) to the control driver 400.

[0075] Accordingly, the control unit 410 can control at least one of the data alignment unit 430 and the control signal generation unit 420 so as to increase the brightness of the image, which has been reduced by the deterioration prevention function, to the brightness of the normal state.

[0076] That is, under the control of the control unit 410, the data alignment unit 430 can generate image data (Data) having the same luminance level as that of the input image data (Ri, Gi, Bi) and transmit the image data (Data) to the data driver 300.

[0077] In addition, the control signal generator 420 may generate a power control signal to increase the magnitude of the first voltage (EVDD) according to the control of the controller 410, and may supply the power control signal to the power supply 500.

[0078] This allows the luminance of the entire light-emitting display panel or the luminance of the logo to be increased to a luminance corresponding to the input image data (Ri, Gi, Bi). As a result, in response to the degradation prevention function disable request signal (DARS), the luminance of the entire light-emitting display panel or a part thereof can be increased and restored to a normal level of luminance (e.g., when the degradation prevention function is not performed or activated).

[0079] After transmitting the degradation prevention function disable request signal (DARS) to the control driver 400, the scaler 600 can transmit the degradation prevention function activate request signal (ARS) to the control driver 400 again after a preset period has elapsed.

[0080] This enables the control driver 400 to perform the degradation prevention function again.

[0081] Next, the power supply unit 500 generates various power supplies and supplies the generated power supplies to the control driver 400 , the gate driver 200 , the data driver 300 , and the light-emitting display panel 100 .

[0082] In particular, the power supply unit 500 can change the magnitude of the first voltage (EVDD) in response to a power control signal transmitted from the control signal generating unit 420.

[0083] In this case, the magnitude of the first voltage (EVDD) supplied to the entire pixel (P) can be changed, but it is also possible to change only the magnitude of the first voltage (EVDD) supplied to a specific pixel (P).

[0084] For example, when a still image is output, the luminance of the entire light-emitting display panel 100 decreases, so the magnitude of the first voltage (EVDD) supplied to the entire pixel (P) can be changed.

[0085] In addition, when an image displaying a logo is output, only the brightness of the light output from the area displaying the logo can be reduced, and therefore, only the magnitude of the first voltage (EVDD) supplied to a specific pixel (P) provided in the area displaying the logo can be changed.

[0086] Next, the gate driver 200 can be directly built into the non-display area (NDA) using a gate in panel (GIP) method, or can be provided in the display area (DA) where the light emitting element (ED) is provided, or can be provided on a chip on film attached to the non-display area (NDA).

[0087] The gate driver 200 supplies gate pulses (GP1 to GPg) to the gate lines (GL1 to GLg).

[0088] When the gate pulse (GP) generated by the gate driver 200 is supplied to the gate of the switching transistor (Tsw1) included in the pixel (P), the switching transistor (Tsw1) is turned on. When the switching transistor (Tsw1) is turned on, the data voltage (Vdata) supplied through the data line (DL) is supplied to the pixel (P).

[0089] When a gate-off signal generated by the gate driver 200 is supplied to the switching transistor Tsw1, the switching transistor Tsw1 is turned off. When the switching transistor Tsw1 is turned off, the data voltage Vdata is no longer supplied to the pixel P.

[0090] The gate signal (GS) supplied to the gate line (GL) includes a gate pulse (GP) and a gate off signal.

[0091] In order to supply gate pulses (GP1 to GPg) to the gate lines (GL1 to GLg), the gate driver 200 includes stages (ST1 to STg) connected to the gate lines (GL1 to GLg) as shown in FIG.

[0092] Each of the stages (ST1 to STg) can be connected to one gate line (GL), but can also be connected to at least two gate lines (GL).

[0093] In order to generate the gate pulses (GP1 to GPg), a gate start signal (VST) and at least one gate clock (GCLK) generated by the control signal generating unit 420 are transmitted to the gate driver 200. That is, the gate start signal (VST) and at least one gate clock (GCLK) are included in the gate control signal (GCS).

[0094] Any one of the stages (ST1 to STg) is driven by a gate start signal (VST) and can output a gate pulse (GP) to a gate line (GL). The gate pulse (GP) can be generated by a gate clock (GCLK).

[0095] At least one of the signals output from the stage (ST) to which the gate pulse (GP) is output is also supplied to another stage (ST) to drive the other stage (ST), thereby allowing the other stage (ST) to output a gate pulse.

[0096] That is, the stages (ST) are driven sequentially, and the gate pulses (GP) can be supplied sequentially to the gate lines (GL).

[0097] The light emitting display device according to the present specification may be applied to any one of various types of gate drivers 200 currently in use, and since the features of the present specification do not lie in the structure and function of the gate driver 200, a detailed description of the specific structure and function of the stage (ST) will be omitted.

[0098] Finally, the data driver 300 supplies a data voltage (Vdata) to the data lines (DL1 to DLd).

[0099] To this end, as shown in FIG. 6, the data driver 300 includes a shift register unit 310 for outputting a sampling signal, a latch unit 320 for latching image data (Data) received from the control driver 400, a digital-to-analog converter 330 for converting the image data (Data) transmitted from the latch unit 320 into a data voltage (Vdata) and outputting the data voltage (Vdata), and an output buffer 340 for outputting the data voltage (Vdata) transmitted from the digital-to-analog converter 330 to a data line (DL) in response to a source output enable signal (SOE).

[0100] The shift register unit 310 outputs a sampling signal using a data control signal (DCS) received from the control signal generating unit 420. For example, the data control signal (DCS) transmitted to the shift register unit 310 may include a source start pulse (SSP) and a source shift clock signal (SSC).

[0101] The latch unit 320 latches image data sequentially received from the control driver 400, and then simultaneously outputs the image data to the digital-to-analog converter (DAC) 330 in response to a sampling signal.

[0102] The digital-to-analog converter 330 simultaneously converts the image data (Data) transmitted from the latch unit 320 into a data voltage (Vdata) and outputs the converted data voltage.

[0103] The output buffer 340 simultaneously outputs the data voltages (Vdata) transmitted from the digital-to-analog converter 330 to the data lines (DL1 to DLd) of the display panel in response to a source output enable signal (SOE) transmitted from the control signal generator 420.

[0104] To this end, the output buffer 340 may include a buffer 341 that stores the data voltage (Vdata) transmitted from the digital-to-analog converter 330, and a switch 342 that outputs the data voltage (Vdata) stored in the buffer 341 to the data line (DL) in response to a source output enable signal (SOE).

[0105] That is, when the switch 342 is turned on by a source output enable signal SOE simultaneously supplied to the switch 342, the data voltage Vdata stored in the buffer 341 can be supplied to the data lines DL1 to DLd through the switch 342.

[0106] The data voltages (Vdata) supplied to the data lines (DL1 to DLd) are supplied to the pixels (P) connected to the gate lines (GL) to which the gate pulses (GP) are supplied.

[0107] Since the features of this specification do not lie in the structure and function of the data driver 300, a detailed description of the specific structure and function of the data driver 300 will be omitted.

[0108] FIG. 7 is an exemplary diagram showing a driving method of an emissive display device according to one embodiment of the present specification, FIGS. 8A to 8C are exemplary diagrams showing signals transmitted between a scaler and a control driver in an emissive display device according to one embodiment of the present specification, and FIG. 9 is an exemplary diagram showing a emissive display panel applied to an emissive display device according to one embodiment of the present specification.

[0109] In the following description, content that is the same as or similar to the content described with reference to FIGS. 1 to 6 will be omitted or will be described briefly.

[0110] First, when power is supplied to the light emitting display device and the scaler 600 and the control driver 400 are driven, the analyzer 630 of the scaler 600 transmits an anti-degradation function activation request signal (ARS) to the control driver 400 as shown in FIG. 8A (S12).

[0111] Next, upon receiving an anti-degradation function activation request signal (ARS), the control driver 400 activates the anti-degradation function (S14).

[0112] Activating the anti-degradation function means analyzing the input image data (Ri, Gi, Bi) to perform the anti-degradation function.

[0113] For example, as described above, the controller 410 of the control driver 400 can analyze the input image data (Ri, Gi, Bi) and determine whether the input image data (Ri, Gi, Bi) corresponding to a still image is input for a preset period (when the TPC function is executed). The controller 410 can also analyze the input image data (Ri, Gi, Bi) and determine whether the input image data (Ri, Gi, Bi) corresponding to an image including a logo is input (when the LEA function is executed).

[0114] That is, the control driver 400 can analyze the input image data (Ri, Gi, Bi) to perform a TPC function, a LEA function, and / or various other anti-degradation functions.

[0115] Next, the degradation prevention function is executed, and when the brightness of the entire pixel (P) or the brightness of the pixel (P) corresponding to the logo decreases, the control unit 410 transmits degradation prevention function start information (ONS) to the scaler 600, as shown in FIG. 8B (S16).

[0116] That is, when the degradation prevention function is activated in the control driver 400 by the degradation prevention function activation request signal (ARS) received from the scaler 600, the control driver 400 analyzes the input image data (Ri, Gi, Bi). If the analysis result shows that the luminance of the entire pixel (P) or the luminance of the pixel (P) corresponding to the logo has decreased, the control driver 400 transmits degradation prevention function onset information (ONS) to the scaler 600.

[0117] More specifically, when the control driver 400 receives the degradation prevention function activation request signal (ARS), it analyzes the input image data (Ri, Gi, Bi) received from the scaler 600. If it is determined that the degradation prevention function can be applied as a result of analyzing the input image data (Ri, Gi, Bi), for example, if it is determined that a still image or an image including a logo is to be output, the control driver 400 reduces the brightness of the image output from the light-emitting display panel 100 or reduces the brightness of an area in which the logo is displayed in the image output from the light-emitting display panel 100. After the brightness of the image is reduced, the control unit 410 transmits degradation prevention function onset information (ONS) to the analysis unit 630 of the scaler 600.

[0118] Next, upon receiving the degradation prevention function start information (ONS), the analysis unit 630 analyzes the input image data (Ri, Gi, Bi) and determines whether there is a change in the input image data (Ri, Gi, Bi) (S18).

[0119] That is, when degradation prevention function start information (ONS) is received from the control driver 400, the analysis unit 630 analyzes the image change amount of the input image data (Ri, Gi, Bi) and determines whether the image brightness that has been reduced by the degradation prevention function needs to be increased to the normal state brightness.

[0120] More specifically, until the degradation prevention function onset information (ONS) is transmitted to the scaler 600, the control driver 400 analyzes the input video data (Ri, Gi, Bi) and determines whether the control driver 400 should reduce the brightness of the video. Therefore, the scaler 600 does not analyze the input video data (Ri, Gi, Bi) regarding the degradation prevention function.

[0121] However, when degradation prevention function onset information (ONS) is transmitted to the scaler 600, the scaler 600 analyzes the input image data (Ri, Gi, Bi) to determine whether the brightness of the image reduced by the degradation prevention function needs to be increased to the brightness of the normal state.

[0122] Next, as a result of the determination (S18), if it is determined that the brightness of the image, which has been reduced due to the deterioration prevention function, does not need to be increased to the brightness of the normal state, the analysis unit 630 continuously performs the operation of determining the input image data (Ri, Gi, Bi).

[0123] While the analysis unit 630 continuously performs the operation of determining the input image data (Ri, Gi, Bi), the brightness of the image output from the light-emitting display panel 100 is maintained at a brightness lower than the brightness corresponding to the input image data (Ri, Gi, Bi) due to the deterioration prevention function.

[0124] That is, when a still image is output, if the light emitting element (ED) continuously outputs light at high brightness, the deterioration rate of the light emitting element (ED) may increase. However, in the light emitting display device according to the present specification, when a still image is output, the brightness of the light emitting element (ED) can be reduced, thereby reducing the deterioration rate of the light emitting element (ED), and thus the deterioration rate of the light emitting display device can be slowed down.

[0125] In addition, if the light emitting element (ED) provided in the area where the logo is continuously output continuously outputs light at high luminance, the deterioration rate of the light emitting element (ED) provided in the area where the logo is continuously output may increase, which may have a negative effect on the light emitting display panel 100. However, in the light emitting display device according to the present specification, the luminance of the light emitting element (ED) provided in the image where the logo is continuously output may be reduced, thereby reducing the deterioration rate of the light emitting element (ED), thereby slowing down the deterioration rate of the light emitting display device.

[0126] While the analysis unit 630 is performing the operation of determining the input image data (Ri, Gi, Bi), the control unit 410 can also analyze the input image data (Ri, Gi, Bi) and determine whether there is a change in the input image data (Ri, Gi, Bi).

[0127] That is, according to the present specification, the control unit 410 can continuously determine whether there is a change in the input image data (Ri, Gi, Bi) for the degradation prevention function, regardless of the analysis unit 630.

[0128] However, when the deterioration prevention function start information (ONS) is generated in the control unit 410, the control unit 410 may end the analysis of the input image data (Ri, Gi, Bi) for the deterioration prevention function. However, even if the analysis of the input image data (Ri, Gi, Bi) for the deterioration prevention function is ended, the function of reducing the brightness of the entire light emitting display panel 100 or the function of reducing the brightness of the area where the logo is displayed can be continuously performed.

[0129] Next, if it is determined that the image brightness, which has been reduced by the degradation prevention function, needs to be increased to the normal brightness (S18), the analysis unit 630 transmits a degradation prevention function disable request signal (DARS) to the control driver 400 (S20), as shown in FIG. 8C.

[0130] For example, if the judgment result (S18) is that input image data (Ri, Gi, Bi) corresponding to a moving image or an image without a logo has been received, the analysis unit 630 can transmit a degradation prevention function disable request signal (DARS) to the control driver 400.

[0131] That is, the purpose of the degradation prevention function is to reduce the brightness of a still image or an image with a logo in order to prevent the light emitting element (ED) from deteriorating. Therefore, when input image data (Ri, Gi, Bi) corresponding to an image other than a still image, i.e., a moving image, or input image data (Ri, Gi, Bi) corresponding to an image without a logo is received, the brightness of the image should not be reduced. Therefore, when it is determined that input image data (Ri, Gi, Bi) corresponding to a moving image or an image without a logo is received, a degradation prevention function disable request signal (DARS) is transmitted to the control driver 400 to terminate the degradation prevention function.

[0132] In addition, if the result of the determination (S18) is that a change occurs in part of the image continuously output from the light-emitting display panel 100, the analysis unit 630 can transmit a degradation prevention function disable request signal (DARS) to the control driver 400.

[0133] Here, a change in a part of an image means a change in a very small area of ​​the image output from the light-emitting display panel.

[0134] For example, as shown in FIG. 9, compared with the overall size of the light-emitting display panel 100, the size of the mouse cursor 110 is very small.

[0135] That is, when the light emitting display device is used as a monitor and connected to a computer, a user can move the mouse, thereby moving the mouse cursor 110. Since the size of the mouse cursor 110 is small, the area or path in which the mouse cursor 110 moves is limited to a very narrow area or path.

[0136] To perform the degradation prevention function, the control unit 410 of the control driver 400 determines a change in the image by comparing input image data (Ri, Gi, Bi) contained in at least two frames. A frame means a period during which one image is output.

[0137] However, the control driver 400 aims to distinguish between still images and moving images. Therefore, even if a movement is detected in a very small area, such as the movement of the mouse cursor 110, the control driver 400 does not judge such a movement as a moving image. Therefore, even if the movement of the mouse cursor 110 is detected after the deterioration prevention function is executed and the brightness of the image is reduced, the control driver 400 cannot judge that it is receiving input image data (Ri, Gi, Bi) corresponding to a moving image. Therefore, even if the user moves the mouse cursor 110 after the brightness of the image is reduced, the brightness of the image remains reduced. As a result, the user sees an image with low brightness, which causes discomfort.

[0138] To prevent this problem, the analyzer 630 can determine that the image has changed even when a change occurs in a part of the image continuously output from the light-emitting display panel 100.

[0139] To this end, the image change amount used by the analysis unit 630 to generate the degradation prevention function disable request signal (DARS) can be set to be smaller than the image change amount used by the control unit 410 to terminate the degradation prevention function.

[0140] For example, the control unit 410 can determine that an image is a moving image only when more than 50% of the input image data (Ri, Gi, Bi) corresponding to one image displayed on the entire light-emitting display panel 100 changes, i.e., when the image change amount is 50% or more, and can increase or decrease the brightness accordingly.

[0141] However, if more than 0.1% of the input image data (Ri, Gi, Bi) corresponding to one image changes, i.e., if the image change amount is 0.1% or more, the analysis unit 630 can determine that the image has changed, and can thereby generate a degradation prevention function disable request signal (DARS).

[0142] The amount of image change that the analyzer 630 determines as an image change can be set in various ways, taking into account a mouse or a single character.

[0143] Therefore, according to this specification, even if a change in a part of an image continuously output from the light-emitting display panel 100 is a change caused by the movement of the mouse cursor 110, a degradation prevention function disable request signal (DARS) can be generated.

[0144] That is, according to this specification, image changes that cannot be detected by the control driver 400 can be detected by the scaler 600, thereby making it possible to disable the degradation prevention function.

[0145] Furthermore, the change in a portion of the continuously outputted image may be a change due to the output of characters by operating the keyboard.

[0146] For example, even if the user inputs characters using the keyboard when the image brightness is reduced by the degradation prevention function, the area in which the characters are displayed is very small, so the control unit 410 determines that input image data (Ri, Gi, Bi) corresponding to a still image has been input, and can continuously reduce the image brightness.

[0147] However, the analyzer 630 can generate the degradation prevention function disable request signal (DARS) even if the input image data (Ri, Gi, Bi) changes due to characters in a very small area of ​​the light-emitting display panel 100. This allows the user to increase the brightness of the image using the keyboard.

[0148] In this case, the analysis unit 630 may be configured not to generate the degradation prevention function disable request signal (DARS) when an image change occurs in a preset specific area in the entire area of ​​the light-emitting display panel 100. Here, the specific area may be an area that should not affect the degradation prevention function, for example, an area where the clock 120 is displayed, as shown in FIG.

[0149] For example, when the light-emitting display device is used as a monitor, a computer can output a task display bar (task bar) 130 at the bottom end of the light-emitting display panel 100, as shown in FIG. 9, and the task display bar 130 can display a clock 120 that changes at regular intervals.

[0150] The analysis unit 630 can provide information regarding the position of the work display bar 130 or information regarding the position of the clock 120 from a computer, or the control unit 410 can obtain information regarding the position where the work display bar 130 is displayed and information regarding the position where the clock 120 is displayed by using a method such as detecting a logo.

[0151] When the brightness of the image is reduced due to the degradation prevention function of the control driver 400, the brightness of the area in which the task display bar 130 and the clock 120 are located is also reduced.

[0152] In this case, as described above, the image change amount used by the analysis unit 630 to generate the degradation prevention function disable request signal (DARS) is smaller than the image change amount used by the control unit 410 to terminate the degradation prevention function. Therefore, when the clock 120 changes in units of seconds or minutes, the analysis unit 630 can generate the degradation prevention function disable request signal (DARS).

[0153] To prevent this problem, the analysis unit 630 may be configured not to generate a degradation prevention function disable request signal (DARS) when an image change occurs in a predefined specific area within the entire area of ​​the light-emitting display panel 100.

[0154] The preset specific area may be the area where the task indicator bar 130 is displayed, or the area where the clock 120 is displayed, as described above.

[0155] Next, upon receiving a degradation prevention function disable request signal (DARS) from the scaler 600, the control driver 400 disables the degradation prevention function (S22).

[0156] When the deterioration prevention function is disabled, the deterioration prevention function is not executed, so that the control driver 400 outputs, through the light-emitting display panel 100, an image having a luminance corresponding to the input image data (Ri, Gi, Bi).

[0157] To this end, the control unit 410 can control at least one of the data alignment unit 430 and the control signal generation unit 420 so as to increase the brightness of the image, which has decreased due to the deterioration prevention function, to the brightness of the normal state.

[0158] That is, under the control of the control unit 410, the data alignment unit 430 can generate image data (Data) having the same luminance level as that of the input image data (Ri, Gi, Bi) and transmit the image data (Data) to the data driver 300.

[0159] In addition, under the control of the control unit 410, the control signal generating unit 420 can generate a power control signal for increasing the magnitude of the decreased first voltage (EVDD) and supply the power control signal to the power supply unit 500.

[0160] This makes it possible to increase the luminance of the entire light-emitting display panel or the luminance of the logo to a luminance corresponding to the input video data (Ri, Gi, Bi).

[0161] In this case, as described above, when the deterioration prevention function is disabled, the deterioration prevention function is not executed any more in the control driver 400. That is, even if a still image is output again after the image brightness has increased, the brightness of the still image does not decrease.

[0162] Finally, after transmitting the degradation prevention function disable request signal (DARS) to the control driver 400, the analysis unit 630 may transmit the degradation prevention function activate request signal (ARS) to the control driver 400 again after a preset period has elapsed, as shown in Fig. 8A, so that the control driver 400 can perform the degradation prevention function again (S24).

[0163] That is, as explained above, when the degradation prevention function is disabled, the control driver 400 will no longer execute the degradation prevention function, so that even if the still image is output again after the image brightness has increased, the brightness of the still image will not decrease.

[0164] To prevent this, in this specification, after a preset period of time has elapsed since a degradation prevention function disable request signal (DARS) was transmitted to the control driver 400, the analysis unit 630 may again transmit an degradation prevention function activation request signal (ARS) to the control driver 400.

[0165] Here, the preset period may be, for example, several to several hundred frames, or several seconds.

[0166] Upon receiving the degradation prevention function activation request signal (ARS), the control driver 400 and the scaler 600 can repeatedly perform the above-described steps (S12 to S24).

[0167] As a result, the light emitting display device can continuously perform the deterioration prevention function, and the deterioration prevention function of the control driver 400 can be controlled through the scaler 600 .

[0168] That is, when the control driver 400 receives an anti-degradation function activation request signal (ARS) from the scaler 600 after a preset period has elapsed, the control driver 400 analyzes the input image signal received from the scaler 600 and can change the brightness of the image output from the light-emitting display panel 100 based on the results of analyzing the input image signal.

[0169] As described above, in the light emitting display device according to the present specification, the scaler 600 can transmit only the degradation prevention function start signal (ONS) from the control driver 400 to the scaler 600 so that the scaler 600 controls the degradation prevention function of the control driver 400. Therefore, when the control driver 400 manufactured for a television is used for a monitor, only the configuration or program for generating and transmitting the degradation prevention function start signal (ONS) of the control driver 400 can be changed.

[0170] Therefore, the control driver 400 manufactured for a television can also be used for a monitor, thus expanding the range of uses of the control driver 400.

[0171] In particular, in the light emitting display device according to the present specification, instead of the control driver 400 which cannot detect small changes in an image, the scaler 600 can detect small changes such as the movement of the mouse cursor 110. Therefore, even if the control driver 400 manufactured for distinguishing between still images and moving images or images including logos is applied to the light emitting display device for monitors, the deterioration prevention function can be normally performed.

[0172] In other words, according to this specification, even if there is no design change to the control driver 400 that performs the deterioration prevention function, the control driver 400 that has already been used to perform the deterioration prevention function can be applied as is to the monitor light-emitting display device.

[0173] Therefore, according to this specification, the manufacturing cost of the light emitting display device can be reduced.

[0174] Those skilled in the art will understand that the present specification may be embodied in different specific forms without changing the technical spirit or essential features of the present specification. Therefore, it should be understood that the above-described embodiments are illustrative in all respects and are not limiting. [Explanation of symbols]

[0175] 100: Illuminating display panel 200: Gate driver 300: Data driver 400: Control driver

Claims

1. A control driver that performs the deterioration prevention function; a scaler that transmits a degradation prevention function activation request signal to the control driver and transmits a degradation prevention function disable request signal to the control driver when degradation prevention function start information is received from the control driver according to an analysis result of the input video data; a light-emitting display panel that displays an image under the control of the control driver; The control driver: When receiving the degradation prevention function activation request signal, analyze the input video signal received from the scaler, and transmit the degradation prevention function start information to the scaler according to the analysis result of the input video signal; The light emitting display device disables the degradation prevention function when the degradation prevention function disable request signal is received.

2. The control driver: Upon receiving the degradation prevention function activation request signal, analyzing the input video signal received from the scaler; When it is determined that the deterioration prevention function can be applied as a result of analyzing the input image signal, the brightness of the image output from the light-emitting display panel is reduced, or the brightness of an area in which a logo is displayed in the image is reduced, and The light emitting display device according to claim 1 , further comprising: a scaler configured to transmit the deterioration prevention function start information to the scaler.

3. The light-emitting display device according to claim 1 , wherein the scaler transmits the deterioration prevention function disable request signal to the control driver when the scaler determines that a change has occurred in a portion of the image continuously output from the light-emitting display panel.

4. The light emitting display device according to claim 3 , wherein the change in the portion of the image that is continuously output is a change caused by a movement of a mouse cursor.

5. The light emitting display device according to claim 3 , wherein the change in the portion of the image that is continuously output is a change due to output of a character.

6. 2 . The light emitting display device according to claim 1 , wherein the image change amount used in the scaler to generate the degradation prevention function disable request signal is smaller than the image change amount used by the control driver to terminate the degradation prevention function.

7. 2 . The light emitting display device of claim 1 , wherein the scaler does not generate the deterioration prevention function disable request signal when an image change occurs in a preset specific area of ​​the entire area of ​​the light emitting display panel.

8. The light-emitting display device according to claim 7 , wherein the specific area is an area that is not affected by a deterioration prevention function.

9. The light emitting display device of claim 1 , wherein the scaler transmits the degradation prevention function activation request signal to the control driver when a preset period has elapsed after transmitting the degradation prevention function disable request signal to the control driver.

10. 10. The light-emitting display device of claim 9, wherein when the control driver receives the deterioration prevention function activation request signal after the preset period has elapsed, the control driver analyzes the input video signal received from the scaler and changes the brightness of the image output from the light-emitting display panel according to a result of analyzing the input video signal.

11. The scaler comprises: a video information receiving unit for receiving video information; A converter for converting the video information into the input video data; and an analysis unit that transmits the degradation prevention function activation request signal to the control driver, and transmits the degradation prevention function disable request signal to the control driver according to an analysis result of the input video data when the degradation prevention function start information is received from the control driver; The light emitting display device according to claim 1 .

12. The light emitting display device of claim 1 , wherein the light emitting display device is included in a television configured for use as a monitor.

13. a display panel configured to display video; at least one driver configured to drive the display panel; a control driver that provides video data to the at least one driver and activates an anti-degradation function of the display panel; and a scaler that analyzes input image data to determine a change in the input image data, and transmits a degradation prevention function disable request signal to the control driver when it is determined that the change in the input image data is equal to or greater than a reference value; Including, The control driver: When receiving a degradation prevention function activation request signal, analyze the input video signal received from the scaler, and transmit degradation prevention function start information to the scaler according to the analysis result of the input video signal; The electronic device disables the degradation prevention function upon receiving the degradation prevention function disable request signal.

14. The electronic device of claim 13 , wherein the control driver is configured to analyze the input video data and activate the anti-degradation function if the input video data is a still video and / or a video containing a logo.

15. The electronic device of claim 13 , wherein the control driver initiates analysis of the video data in response to the anti-degradation function activation request signal received from the scaler.

16. 16. The electronic device of claim 15, wherein after a certain time has elapsed after transmitting the degradation prevention function disable request signal to the control driver, the scaler generates another degradation prevention function activation request signal and transmits the another degradation prevention function activation request signal to the control driver.

17. The electronic device according to claim 16 , wherein the degradation prevention function is a Temporal Peak Luminance Control (TPC) function or a Logo Extraction Algorithm (LEA) function.

18. 14. The electronic device of claim 13, wherein the change in the input video data determined by the scaler comprises a movement of a cursor displayed on the display panel or a change in a character associated with the display panel.

19. The electronic device of claim 13 , wherein the modification of the input video data determined by the scaler excludes modifications in a particular display area of ​​the display panel or modifications to a clock display area of ​​the display panel.

20. The electronic device of claim 13 , wherein the reference value is 0.1% of the input image data corresponding to one image.

Images