KR20200059957A - Organic light emitting display including temperature sensor - Google Patents

Abstract

Embodiments of the present invention may provide an organic light emitting display device including a temperature sensor capable of measuring the temperature. The organic light emitting display device comprises: a display panel including a plurality of pixels; a data driver generating a data signal and supplying the data signal to the display panel; a gate driver supplying a gate signal to the display panel; a temperature sensor disposed to correspond to the display panel and sensing the temperature of the display panel; a temperature sensor driver driving the temperature sensor; a temperature processor generating temperature information in correspondence with an output signal of the temperature sensor; and a controller correcting deterioration information in correspondence with the temperature information.

Description

Organic light emitting display device including temperature sensor {ORGANIC LIGHT EMITTING DISPLAY INCLUDING TEMPERATURE SENSOR}

Embodiments of the present invention relates to an organic light emitting display device including a temperature sensor.

An active matrix type organic light emitting display device including an organic light emitting diode (hereinafter, referred to as "OLED") that emits light itself has advantages of high response speed, high luminous efficiency, brightness and viewing angle.

The organic light emitting diode includes an anode electrode, a cathode electrode, and an organic compound layer formed therebetween. The organic compound layer is a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL) and an electron injection layer (Electron Injection Layer, EIL). Then, when a driving voltage is applied to the anode electrode and the cathode electrode, holes passing through the electron transport layer (HTL) and electrons passing through the electron transport layer (ETL) move to the emission layer (EML) to form excitons, and as a result, the emission layer (EML). In the visible light can be generated.

The organic light emitting display device employing such an organic light emitting diode includes an organic light emitting diode in each pixel, and the luminance can be adjusted by controlling the amount of driving current flowing through the organic light emitting diode according to the gradation of video image data. Each pixel may include a driving transistor that controls driving current. The electrical characteristics of the driving transistor are not uniform depending on the process conditions. In order to solve this problem, the driving current is controlled by compensating for the difference in electrical characteristics of the driving transistor. However, the organic light emitting diode may deteriorate in response to the usage time and the displayed gray level, so that even if the difference in electrical characteristics of the driving transistor is compensated, a luminance difference may be displayed for each pixel. Therefore, the degradation of the organic light-emitting diode can be measured to compensate for the decrease in luminance caused by the degradation.

However, the characteristics of the organic light emitting diode may be changed in response to temperature, so that a luminance deviation may occur depending on the temperature. Therefore, the organic light emitting display device can measure the temperature to compensate for the deterioration. However, when the temperature sensor for measuring the temperature is disposed on a substrate on which circuits for driving the organic light emitting display device are disposed, there is a problem that the temperature applied to the organic light emitting diode cannot be accurately measured due to the temperature of the circuit mounted on the substrate. .

An object of embodiments of the present invention is to provide an organic light emitting display device including a temperature sensor capable of measuring temperature.

In addition, another object of embodiments of the present invention is to provide an organic light emitting display device including a temperature sensor that can improve the life.

In one aspect, embodiments of the present invention include a display panel including a plurality of pixels, a data driver that generates a data signal and supplies a data signal to the display panel, a gate driver that supplies a gate signal to the display panel, and a display panel. Arranged to correspond, a temperature sensor sensing the temperature of the display panel, a temperature sensor driver driving the temperature sensor, a temperature processor generating temperature information in response to the output signal of the temperature sensor, and correcting deterioration information in response to the temperature information It can provide an organic light emitting display device including a controller.

According to embodiments of the present invention, an organic light emitting display device including a temperature sensor may be provided.

According to embodiments of the present invention, it is possible to provide an organic light emitting display device including a temperature sensor that can improve the life.

1 is a structural diagram showing an organic light emitting display device including a temperature sensor according to embodiments of the present invention.
FIG. 2 is a plan view illustrating an embodiment of the display panel shown in FIG. 1.
3 is a circuit diagram illustrating an exemplary embodiment of the pixel illustrated in FIG. 1.
4 is a circuit diagram illustrating an embodiment of the temperature sensor shown in FIG. 1.
5 is a graph showing a relationship between heat and resistance of a metal used in a sensor line employed in a temperature sensor.
6A is a front view showing the arrangement of sensor lines arranged on a display panel.
6B is a cross-sectional view showing a cross section of B-B 'shown in FIG. 6A.
6C is a front view showing a region C shown in FIG. 6A.
7 is a timing diagram showing the operation of the temperature sensor shown in FIG. 3.
8 is a cross-sectional view showing an organic light emitting display device including a temperature sensor according to embodiments of the present invention.
9 is a cross-sectional view showing a cross section of A-A 'of the display panel.
10 is a structural diagram showing the controller shown in FIG. 1.
11 is a plan view illustrating a first embodiment of a sensing unit employed in the display device shown in FIG. 1.
12 is a plan view illustrating a second embodiment of a sensing unit employed in the display device 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 the ordinary knowledge in the technical field to which the present invention pertains. It is provided to fully inform the holder of the scope of the invention, and the invention is only defined by the scope of the claims.

In addition, the shapes, sizes, ratios, angles, numbers, etc. 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 this specification are used, other parts may be added unless '~ man' is used. When a component is expressed in singular, it may include a case in which plural is included unless specifically stated.

In addition, in interpreting the components in the embodiments of the present invention, it should be interpreted as including an error range even if there is no explicit description.

In addition, in describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the essence, order, order, or number of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, the component may be directly connected to or connected to the other component, but different components between each component It will be understood that the "intervenes" may be, or each component may be "connected", "coupled" or "connected" through other components. 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 addition, components in the embodiments of the present invention are not limited by these terms. These terms are only used to distinguish one component from another component. Accordingly, the first component mentioned below may be the second component within the technical spirit of the present invention.

In addition, the features (configurations) in the embodiments of the present invention may be partially or wholly combined with each other or combined or separated, and technically various interlocking and driving are possible, and each embodiment is independently performed with respect to each other. It could be possible or it could be done together in an association relationship.

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

1 is a structural diagram showing an organic light emitting display device including a temperature sensor according to embodiments of the present invention.

Referring to FIG. 1, the display panel 110 includes a plurality of data lines DL1, ..., and DLm arranged in a first direction and a plurality of gate lines GL1, ..., GLn arranged in a second direction. Can be. The plurality of data lines DL1, ..., DLm and the plurality of gate lines GL1, ..., GLn are illustrated as orthogonal, but are not limited thereto. In addition, the wiring arranged on the display panel 110 is not limited to the plurality of data lines DL1, ..., DLm and the plurality of gate lines GL1, ..., GLn.

The display panel 110 may include a plurality of pixels 101 formed corresponding to an area where a plurality of gate lines GL1,…, GLn and a plurality of data lines DL1,…, DLm intersect. The plurality of pixels may be arranged in a matrix form including a plurality of pixel rows in the horizontal direction and a plurality of pixel columns in the vertical direction.

The data driver 120 may apply a data signal to a plurality of data lines DL1, ..., DLm. The data signal may correspond to gradation, and the voltage level of the data signal may be determined according to the gradation. The voltage of the data signal can be referred to as a data voltage. Here, the number of data drivers 120 is shown as one, but is not limited thereto, and may be two or more corresponding to the size and resolution of the display panel 110. Also, the data driver 120 may be implemented as an integrated circuit.

The gate driver 130 may apply a gate signal to the plurality of gate lines GL1, ..., GLn. The pixel 101 corresponding to the plurality of gate lines GL1, ..., and GLn to which the gate signal is applied may receive a data signal. Here, the number of gate drivers 130 is shown as one, but is not limited thereto, and may be at least two. In addition, the gate driver 130 is disposed on both sides of the display panel 110, and one gate driver 130 is connected to an odd numbered gate line among the plurality of gate lines GL1, ..., GLn and the other gate driver. The 130 may be connected to an even-numbered gate line among the plurality of gate lines GL1,…, GLn. However, it is not limited thereto. The gate driver 130 may be implemented as an integrated circuit.

The temperature sensor 150 is disposed at a position corresponding to the display panel 110 and can sense the temperature of the display panel 110. The temperature sensor 150 may be disposed on the display panel 110. The temperature of the display panel 110 can be measured by placing the temperature sensor 150 on the display panel 110. In addition, the temperature sensor 150 may divide the display panel 110 into a plurality of regions and measure temperature for each region. In each area, coordinate values are set and temperature can be measured for each area by measuring the temperature corresponding to each coordinate. The temperature sensor 150 can measure the temperature of the display panel 110 in real time. The temperature sensor 150 may be operated by receiving driving power. The temperature sensor 150 may generate and output a current value corresponding to the temperature.

The temperature sensor driver 160 may drive the temperature sensor 150. The temperature sensor driver 160 may selectively supply driving power to the temperature sensor 150. The temperature sensor driver 160 may supply a switching signal to the temperature sensor 150 to selectively supply driving power to the temperature sensor 150.

The temperature processor 170 may generate temperature information in response to the output signal of the temperature sensor 150. The temperature processor 170 may generate temperature information in correspondence to the size of a signal output from the temperature sensor 150. The temperature sensor 150 controls the amount of current output in response to the temperature, and the temperature processor 170 may generate temperature information in response to the magnitude of the current amount.

The controller 140 may control the temperature sensor driver 160. Under the control of the controller 140, the temperature sensor driver 160 may supply the switching signal to the temperature sensor 150. In addition, the controller 140 may correct the image signal in response to temperature information. The controller 140 may receive the first deterioration information of the pixel 101 and correct the first deterioration information with the temperature information to generate second deterioration information. Deterioration correction can be performed more accurately because it can be dealt with deterioration in response to temperature. Therefore, the life of the organic light emitting display device can be increased.

Also, the controller 140 may control the data driver 120 and the gate driver 130. Also, the controller 140 may supply an image signal to the data driver 120. The video signal supplied from the controller 140 may be a video signal corrected by the controller 140. However, it is not limited thereto. Also, the controller 140 may be a timing controller.

FIG. 2 is a plan view illustrating an embodiment of the display panel shown in FIG. 1.

Referring to FIG. 2, the display panel 110 includes a substrate 111, and a plurality of regions including a pixel region 111a, a link region 111b, and a pad region 111c are formed on the substrate 111. Can be deployed.

The pixel 101 illustrated in FIG. 1 may be disposed in the pixel area 111a. A plurality of data lines DL1, ..., DLm and a plurality of gate lines GL1, ..., GLn shown in FIG. 1 may be disposed in the pixel area 111a. In the link region 111b, wirings for applying signals and voltages to the pixel region 111a may be disposed. The lines arranged in the link region 111b can apply signals to the data lines DL1, ..., DLm and the gate lines GL1, ..., GLn. A plurality of pads may be disposed in the pad area 111c. Each pad of the pad region 111c may be connected to wirings of the link region 111b. External devices are connected to the pad to transmit signals and voltages to the wiring. The area disposed on the substrate 111 of the display panel 110 is not limited thereto.

In addition, the temperature sensor 150 illustrated in FIG. 1 may be disposed corresponding to the pixel region 111a. Therefore, when measuring the temperature of the pixel region 111a, it is possible to minimize the influence of heat generated from external devices and circuits connected to the substrate 111.

3 is a circuit diagram illustrating an exemplary embodiment of the pixel illustrated in FIG. 1.

Referring to FIG. 3, the pixel 101 may include an organic light emitting diode (OLED) and a pixel circuit driving the organic light emitting diode (OLED). The pixel circuit may include a first transistor M1, a second transistor M2, and a capacitor C1.

In the first transistor M1, the gate electrode is connected to the first node N1, the first electrode is connected to the pixel power line VL1 through which the first pixel power EVDD is transferred, and the second electrode is the second node ( N2). The first transistor M1 may allow a current to flow through the second node N2 in response to a voltage transmitted to the first node N1. The first electrode of the first transistor M1 may be a drain electrode, and the second electrode may be a source electrode. However, it is not limited thereto. The first transistor M1 may be referred to as a driving transistor.

The current flowing through the second node N2 may correspond to Equation 1 below.

Here, Id means the amount of current flowing through the second node N2, k means the electron mobility of the transistor, and V _GS means the voltage difference between the gate electrode and the source electrode of the first transistor M1. Vth is the threshold voltage of the first transistor M1.

The second transistor M2 may have a first electrode connected to the data line DL, a gate electrode connected to the gate line GL, and a second electrode connected to the first node N1. Accordingly, the second transistor M2 may allow the data voltage Vdata corresponding to the data signal to be transferred to the first node N1 in response to the gate signal transmitted through the gate line GL. The first electrode of the second transistor M2 may be a drain electrode, and the second electrode may be a source electrode. However, it is not limited thereto.

The capacitor Cst may have a first electrode connected to the first node N1 and a second electrode connected to the second node N2. The capacitor Cst may maintain the voltage of the gate electrode and the voltage of the source electrode of the first transistor M1 constant.

In the organic light emitting diode OLED, the anode electrode may be connected to the second node N2 and the cathode electrode may be connected to the second pixel power source EVSS. Here, the voltage level of the second pixel power supply EVSS may be lower than that of the first pixel power supply EVSS. Also, the second pixel power source EVSS may be ground. However, it is not limited thereto. The second pixel power (EVSS) may be supplied through a low power line. The organic light emitting diode (OLED) may emit light corresponding to the amount of current when current flows from the anode electrode to the cathode electrode. The organic light emitting diode (OLED) may emit any one of red, green, blue, and white colors. However, it is not limited thereto.

In addition, the pixel 101 of the organic light emitting display device 100 illustrated in FIG. 1 is not limited thereto. The organic light emitting diode (OLED) as described above is deteriorated in accordance with the use time and / or gradation. Degradation can be measured by using the voltage between the anode electrode and the cathode electrode of the organic light emitting diode (OLED). The voltage between the anode electrode and the cathode electrode can be determined by measuring the voltage of the second node N2. The method for determining the degradation of the organic light emitting diode (OLED) is not limited thereto. The voltage of the second node N2 may correspond to the first degradation information.

4 is a circuit diagram illustrating an embodiment of the temperature sensor shown in FIG. 1.

Referring to FIG. 4, the temperature sensor 150 includes a plurality of horizontal sensor lines TSX1, ..., TSXk arranged in a first direction on the display panel 110 and a plurality of arranged in a second direction different from the first direction. It includes a vertical sensor line (TSY1, ..., TSYi), a plurality of horizontal sensor lines (TSX1, ..., TSXk) and a plurality of vertical sensor lines (TSY1, ..., TSYi) disposed between the first insulating layer 151 can do. The horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi may not be connected to each other in a predetermined area on the display panel 100 by the first insulating layer 151. The first insulating layer 151 may be a transparent material. Here, the first insulating layer 151 may cover the entire pixel area 111a illustrated in FIG. 2 on the display panel 110. However, it is not limited thereto.

In addition, the temperature sensor 150 may include an output line TO to which the plurality of horizontal sensor lines TSX1, ..., TSXk and the plurality of vertical sensor lines TSY1, ..., TSYi are connected. The first insulating layer 151 may not be disposed in an area where the output line TO is disposed. The output line TO may be connected to the temperature processor 170 shown in FIG. 1. Here, the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi are illustrated as being orthogonal to each other, but are not limited thereto. In addition, horizontal and vertical are for distinguishing sensor lines, which are not inherent properties of sensor lines. Therefore, the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi may not be orthogonal to each other.

In addition, the temperature sensor 150 is a first switch unit including a plurality of switches SW1s, one end of which is connected to a plurality of horizontal sensor lines TSX1, ..., TSXk, and the other end of which is respectively connected to a driving power source VCC. 410, a second switch unit 420 including a plurality of switches SW2s, one end of which is connected to a plurality of vertical sensor lines TSY1, ..., TSYi and the other end of which is respectively connected to a driving power source Vcc. It can contain.

The plurality of switches SW1s of the first switch unit 410 and the plurality of switches SW2s of the second switch unit 420 may be turned on or off by receiving a switching signal from the temperature sensor driver 160, respectively. . Here, the plurality of switches SW1s of the first switch unit 410 and the plurality of switches SW2s of the second switch unit 420 are all illustrated as P-channel MOS transistors, but are not limited thereto.

The horizontal sensor lines (TSX1, ..., TSXk) and the vertical sensor lines (TSY1, ..., TSYi) each have their own resistance values, and the plurality of horizontal sensor lines (TSX1, ..., TSXk) and a plurality of vertical sensor lines ( The magnitude of the current flowing through TSY1,…, TSYi is the voltage level of the driving power supply (VCC) and the horizontal sensor lines (TSX1,…, TSXk) or vertical sensor lines (TSY1,…, TSYi), respectively. You can respond. When the temperature sensor 150 is disposed at a position corresponding to the display panel 110, when the temperature of the display panel 110 is low, the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi When the temperature of the display panel 110 is high, the intrinsic resistance value of) may be smaller than the intrinsic resistance values of the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi. That is, the resistance values of the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi may increase as the ambient temperature increases. Therefore, the temperature of the display panel 110 may be calculated in correspondence to the magnitude of the current flowing through the horizontal sensor lines TSX1, ..., TSXk or the vertical sensor lines TSY1, ..., TSYi.

The controller 140 illustrated in FIG. 1 may determine coordinates on the display panel 100 in correspondence with the plurality of horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi. The controller 140 may determine coordinates using information on the switch SW1 of the first switch unit 410 and the switch SW2 of the second switch unit 420. Coordinates may generate temperature information for regions of the display panel 110.

5 is a graph showing a relationship between heat and resistance of a metal used in a sensor line employed in a temperature sensor.

Referring to FIG. 5, a change in resistance value according to a temperature change with respect to platinum, copper, and nickel is shown. It can be seen that the resistance value of platinum, copper, and nickel changes linearly to around 200 ° C. In particular, it can be seen that platinum has a linear change in resistance value up to 800 ° C. Accordingly, the plurality of horizontal sensor lines TSX1, ..., TSXk and the plurality of vertical sensor lines TSY1, ..., TSYi may include at least one of platinum, copper, and nickel.

In addition, when the organic light emitting display device 100 is exposed to a high temperature environment, platinum, copper, and nickel increase linearly with respect to temperature to around 200 ° C, and the temperature sensor is at least one metal of platinum, copper, and nickel. Since it includes, the temperature sensor of the organic light emitting display device 100 may operate normally.

Here, although the temperature sensor is described as including platinum, copper, and nickel, this is illustrative and is not limited thereto. The temperature sensor may include a material whose resistance value is temperature sensitive.

FIG. 6A is a front view showing an arrangement of sensor lines arranged on a display panel, and FIG. 6B is a cross-sectional view showing a cross section of B-B 'shown in FIG. 6A. 6C is an enlarged front view of region C shown in FIG. 6A.

6A to 6C, the first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 may be disposed on the display panel 110 in a first direction. In addition, the first vertical sensor line TSY1 and the second vertical sensor line TSY2 may be arranged in the second direction. The first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 and the first vertical sensor line TSY1 and the second vertical sensor line TSY2 may cross each other. The display panel 110 may include an opening area OA and a non-opening area. The non-opening area may be disposed around the opening area. The first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 and the first vertical sensor line TSY1 and the second vertical sensor line TSY2 may intersect in a non-opening area on the display panel 110. . Therefore, the opening area OA is not obscured by the first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 and the first vertical sensor line TSY1 and the second vertical sensor line TSY2. No degradation will occur. Here, although the opening area OA is illustrated as being rectangular, it is not limited thereto.

In addition, the insulating films 151a, 151b, 151c, and 151d have a first horizontal sensor line TSX1 and a second horizontal sensor line TSX2 and a first vertical sensor line TSY1 and a second vertical sensor line TSY2, respectively. It can be placed in an intersecting area. That is, the first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 are disposed on the same layer as the first vertical sensor line TSY1 and the second vertical sensor line TSY2, and the insulating films 151a, 151b, 151c, 151d) may be connected only through a bridge as shown in FIG. 6B. The bridge may correspond to a line passing through the upper portion of the first insulating layer 151a among the first horizontal sensor lines TSX1. However, the present invention is not limited thereto, and the bridge may pass under the first vertical sensor line TSY1. The bridge may pass through the first insulating layer 151a and pass through the upper portion of the first vertical sensor line TSY1. The first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 and the first vertical sensor line TSY1 and the second vertical sensor line TSY2 are all made of metal containing at least one of platinum, copper, and nickel. When manufacturing, the cost may increase. In order to prevent such an increase in cost, only the bridge part may be made of a metal containing at least one of platinum, copper, and nickel. In addition, as illustrated in FIG. 6C, the first horizontal sensor line TSX1, the second horizontal sensor line TSX2, the first vertical sensor line TSY1, and the second vertical sensor line TSY2 overlap each other. The region corresponding to the portion may be made of a metal containing at least one of platinum, copper, and nickel. Here, although a part made of a metal containing at least one of platinum, copper, and nickel is shown thicker than a part that does not, this is to distinguish between a part which is a metal containing at least one of platinum, copper, and nickel and a non-part. The hazard thickness is shown in a different way, but is not limited thereto. Here, an insulating layer may be disposed between the first horizontal sensor line TSX1, the second horizontal sensor line TSX2, the first vertical sensor line TSY1, and the second vertical sensor line TSY2.

7 is a timing diagram showing the operation of the temperature sensor shown in FIG. 3.

Referring to FIG. 7, the switching signals Rx1,?, Rxk, Tx1,?, Txi output from the temperature sensor driver 160 sequentially include a plurality of switches SW1s included in the first switch unit 410. After being turned on / off, a plurality of switches SW2s included in the second switch unit 420 may be sequentially turned on / off.

When the first switching signal Rx1 is output from the temperature sensor driver 160, the first switch SW1 of the first switch unit 410 may be turned on. When the first switch SW1a is turned on, the driving power Vcc and the first horizontal sensor line TSX1 are connected, and the first horizontal corresponds to the resistance value of the driving power Vcc and the first horizontal sensor line TSX1. Current flows through the sensor line (TSX1). The current flowing in the first horizontal sensor line TSX1 is transmitted to the temperature processor 170 through the output line TO, and the temperature processor 170 can calculate the magnitude of the current flowing in the first horizontal sensor line TSX1. have.

Then, when the second switching signal Rx2 is output, the second switch SW1b of the first switch unit 410 may be turned on. When the second switch SW1b is turned on, the driving power Vcc and the second horizontal sensor line TSX2 are connected, and the second horizontal level corresponds to the resistance value of the driving power Vcc and the second horizontal sensor line TSX2. Current flows through the sensor line (TSX2). The current flowing in the second horizontal sensor line TSX2 is transmitted to the temperature processor 170 through the output line TO, and the temperature processor 170 can calculate the magnitude of the current flowing in the second horizontal sensor line TSX2. have.

When the k-th switching signal Rxk is output in this manner, the k-th switch of the first switch unit 410 is turned on, and current flows through the k-th horizontal sensor line TSXk. The current flowing through the k-th horizontal sensor line (TSXk) is transmitted to the temperature processor 170 through the output line (TO), and the temperature processor 170 can calculate the magnitude of the current flowing through the k-th horizontal sensor line (TSXk). have.

Then, when the k + 1 th switching signal Tx1 is output, the first switch SW2a of the second switch unit 420 may be turned on. When the first switch SW2a of the second switch unit 420 is turned on, the driving power Vcc and the first vertical sensor line TSY1 are connected, and the driving power Vcc and the first vertical sensor line TSY1 are connected. A current flows through the first vertical sensor line TSY1 in response to the resistance value. The current flowing through the first vertical sensor line TSY1 is transmitted to the temperature processor 170 through the output line TO, and the temperature processor 170 can calculate the magnitude of the current flowing through the first horizontal sensor line TSX1. have.

In this way, the magnitude of the current flowing through all the horizontal sensor lines TSX1, ..., TSXk and all the vertical sensor lines TSY1, ..., TSYi can be calculated by the temperature processor 170.

The temperature of the display panel 110 may be determined according to the calculated current. In addition, the display panel 110 can be divided into a plurality of regions and the temperature can be grasped for each region in correspondence to coordinate values corresponding to the horizontal sensor lines TSX1, ..., TSXk and the vertical sensor lines TSY1, ..., TSYi. have. The plurality of regions may correspond to the number of pixels. However, it is not limited thereto.

8 is a cross-sectional view showing an organic light emitting display device including a temperature sensor according to embodiments of the present invention.

Referring to FIG. 8, in the organic light emitting display device 100, a color filter 820 may be disposed on the sealing substrate 810. Although the color filter 820 is illustrated as being disposed on the sealing substrate 810, the position of the color filter 820 is not limited thereto. In addition, the second insulating layer 860 may be disposed at a predetermined distance from the sealing substrate 810. The second insulating layer 860 may be transparent. A temperature sensor 850 may be disposed on a first surface facing the color filter 820 of the second insulating layer 860. The temperature sensor 850 may be formed by patterning the second insulating layer 860. Due to this, the thickness of the temperature sensor 850 may be formed thin.

In addition, the touch sensor 870 may be disposed on a surface opposite to the first surface of the second insulating layer 860. The temperature sensor 850 is disposed on the first surface to accurately measure the temperature of the display panel 110. The temperature sensor 850 is shown as one layer, but is not limited thereto, and the temperature sensor 150 shown in FIG. 4 may be disposed. In this case, the first insulating layer 151 illustrated in FIG. 4 may be disposed at a predetermined distance from the second insulating layer 860. However, it is not limited thereto. The touch sensor 870 is also illustrated as one layer on the second insulating layer 860, but is not limited thereto.

A cover glass 880 may be disposed on the touch sensor 870. The touch sensor 870 is not disposed on the cover glass 880.

9 is a cross-sectional view showing a cross section of A-A 'of the display panel.

Referring to FIG. 9, the active layer 902 may be patterned and disposed on the substrate 901. Here, the substrate 901 may be the substrate 111 shown in FIG. 2. The active layer 902 may be a semiconductor layer. In addition, a gate insulating layer 903 may be disposed on the substrate 111 and the active layer 902. The gate electrode 904 may be patterned and disposed on the gate insulating film 903 at a position overlapping the active layer 902. In addition, the first insulating layer 905 may be disposed on the gate electrode 904 and the gate insulating layer 903. Two contact holes may be formed on the first insulating layer 905 and the source-drain metal may be patterned and disposed. The source-drain metal may be patterned on the first insulating layer 905 to become the source electrode 906a and the drain electrode 906b, and may respectively contact the active layer 902 through a contact hole.

In addition, the second insulating layer 907 may be disposed on the first insulating layer 905 on which the source electrode 906a and the drain electrode 906b are formed. The second insulating film 907 may be a planarization film. The anode electrode 908 may be disposed on the second insulating film 907. The anode electrode 908 may be connected to the drain electrode. However, it is not limited thereto. In addition, the bank 909 may be disposed on the second insulating layer 907. In the bank 909, a cavity CV is formed, and the anode electrode 908 may be exposed. In addition, the light emitting layer 910 may be disposed to overlap the anode electrode in the cavity CV. Here, the light emitting film 910 is illustrated as a single film, but is not limited thereto. In addition, the cathode electrode 911 may be disposed on the bank 909 and the light emitting layer 910. The region where the light emitting film 910 is formed may be referred to as an opening region, and the region where the bank 909 is formed may be referred to as a non-opening region. The cathode electrode 911 may be disposed on the front surface of the display panel 110. However, it is not limited thereto.

In addition, the first vertical sensor line TSY1 and the second vertical sensor line TSY2 shown in FIG. 6 may be disposed at positions spaced apart from the cathode electrode 911 by a predetermined distance. The first vertical sensor line TSY1 and the second vertical sensor line TSY2 may be disposed in a region corresponding to the bank 909 so that the light emitting layer 910 is not blocked. Therefore, even if the first vertical sensor line TSY1 and the second vertical sensor line TSY2 are disposed, the aperture ratio of the display panel 110 does not decrease. Although not shown here, the first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 may also be disposed at positions corresponding to the non-opening area where the bank 909 is disposed. The first horizontal sensor line TSX1 and the second horizontal sensor line TSX2 are disposed on the first insulating layer 951, and the first vertical sensor line TSY1 and the second vertical sensor line TSY2 are first isolated. It may be disposed under the layer 951. However, it is not limited thereto.

Further, although it is illustrated that the cathode electrode 911 is disposed on the bank 909 and the first vertical sensor line TSY1 and the second vertical sensor line TSY2 are disposed thereon, the present invention is not limited thereto. , Wherein the sealing substrate 810 shown in Figure 8 is disposed on the cathode electrode 911, the first vertical sensor line (TSY1) and the second vertical sensor line (TSY2) on the upper portion corresponding to the bank 909 Can be placed on. However, it is not limited thereto.

10 is a structural diagram showing the controller shown in FIG. 1.

Referring to FIG. 10, the controller 140 includes a look-up table 142 for storing correction values corresponding to temperature information, and an analog-to-digital converter 143 for converting temperature information transmitted from the temperature processor 170 into digital temperature information. , A calculation unit 141 receiving the correction value stored in the look-up table 142 corresponding to the digital temperature information and correcting and outputting the first degradation information to the second degradation information.

The look-up table 142 may store temperature information corresponding to the amount of current and correction values corresponding to the temperature information corresponding to platinum, copper, and nickel. The correction value may vary over time. That is, the first correction value corresponding to the first time and the second correction value corresponding to the second time may be stored. Also, the first correction value and the second correction value may correspond to gradation. The first correction value and the second correction value may be digital signals. Here, although the number of correction values is described as two, the present invention is not limited to this. Also, the lookup table 142 may store deterioration information.

The analog-to-digital converter 143 may convert an analog signal to a digital signal. The temperature processor 170 may calculate the magnitude of the current amount, and the magnitude of the current amount output from the temperature processor 170 is an analog signal. Therefore, the analog to digital converter 143 is converted to a digital signal in order for the calculation unit 141 to calculate.

The calculation unit 141 may receive the first degradation information. The first degradation information may correspond to the voltage level of the second node N2 in the pixel circuit shown in FIG. 3. The calculation unit 141 may receive a correction value corresponding to temperature information from the look-up table 142. Also, the calculation unit 141 may generate second degradation information in response to the first degradation information. In addition, the controller 140 may correct the image signal using the generated second degradation information. Therefore, deterioration can be compensated for in response to temperature information. Here, the description is made to compensate for the degradation of the organic light emitting diode (OLED) by correcting the image signal in response to the second degradation information, but this is exemplary and is not limited thereto.

FIG. 11 is a plan view illustrating a first embodiment of a sensing unit employed in the display device shown in FIG. 1.

Referring to FIG. 11, the sensing unit 870a is disposed on the display panel 101 and may include a plurality of first electrodes Tea and a plurality of second electrodes TEb. The plurality of first electrodes TEa may correspond to the touch driving electrode TE1a and the plurality of second electrodes TEb may correspond to the touch sensing electrode TEb. The plurality of first electrodes TEa are connected in the row direction by the connection portion 1022 to form a plurality of electrode rows, and the plurality of second electrodes TEb are connected in the longitudinal direction by the connection portion 1022. It may be formed of an electrode row of. Here, although the plurality of first electrodes Tea and the plurality of second electrodes TEb are arranged in a 4 * 3 form, the present invention is not limited thereto.

The first electrodes TEa may receive a touch driving signal, and the second electrodes TEb may transmit a touch sensing signal corresponding to the touch driving signal. The first electrodes TEa and the second electrodes TEb may be formed on the same layer on the display panel 301. However, it is not limited thereto.

The connection unit 1022 may allow one first electrode TEa to be connected to other first electrodes and the second electrode TEb to be connected to other second electrodes. The connecting portion 1022 intersects each other. The connecting portion 1022 connecting the first electrodes TEa to prevent the first electrodes TEa and the second electrodes TEb from being directly connected is the first electrode. The first electrodes TEa and the connection portion 1022 may be connected to the different layers from the TEa and the second electrodes TEb and via vias. The connection portion 1022 connecting the second electrodes TEb may be formed on the same layer as the first electrode TEa and the second electrode TEb so that the second electrodes TEb are connected in the same layer. Therefore, an insulating film (not shown) may be disposed between the connection portion 1022 connecting the first electrodes TEa and the connection portion 1022 connecting the second electrodes TEb.

In addition, the first electrode TEa and the second electrode TEb may be formed by patterning a conductive metal layer. Further, the first electrode TEa and the second electrode TEb may be formed of a transparent material such as ITO (Indium Tin Oxide). In addition, the patterned first electrode TEa and the second electrode TEb may include an electrode pattern formed in a mesh form, and the first electrode TEa and the second electrode TEb may open a plurality of openings. It can contain. The light emitted from the display device through the plurality of openings included in the first electrode TEa and the second electrode TEb made of the ITO electrode or the first electrode TEa and the second electrode TEb is the first electrode ( TEa) and the second electrode TEb may be transmitted or discharged through a plurality of openings.

The patterns of the first electrode TEa and the second electrode TEb formed in the form of a mesh may be referred to as touch electrode wiring. In addition, the first electrode TEa and the second electrode TEb allow the driving signal 1021a to apply a driving signal to be applied to the touch electrode and a sensing signal generated in response to the touch sensed by the touch electrode. It may be connected to the sensing line 1021b. The driving line 1021a and the sensing line 1021b may be referred to as touch wiring. In addition, the touch wiring including the driving line 1021a and the sensing line 1021b may be respectively connected to pads of the pad unit illustrated in FIG. 2.

12 is a plan view illustrating a second embodiment of a sensing unit employed in the display device illustrated in FIG. 8.

Referring to FIG. 12, the sensing unit 870b is disposed on the display panel 110 and a plurality of touch electrodes TE having a predetermined area on the display panel 110 may be arranged in a matrix form. In addition, a plurality of received touch wirings 1120 receiving a touch sensing signal from the touch electrode TE may be connected to each touch electrode TE, respectively. The touch wiring 1120 is disposed under the touch electrode and may contact a region of the touch electrode TE. The touch electrode TE and the touch wiring 1120 may be mounted in the display panel 110 so that the display device 110 is thinly implemented by not including a separate touch panel on the display panel 110. have.

The above description and the accompanying drawings are merely illustrative of the technical spirit of the present invention, and those of ordinary skill in the art to which the present invention pertains combine configurations in a range that does not depart from the essential characteristics of the present invention. , Various modifications and variations such as separation, substitution and change will be possible. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

100: organic light emitting display device
110: display panel
120: data driver
130: gate driver
140: controller
150: temperature sensor
160: temperature sensor driver
170: temperature processor

Claims (14)

A display panel including a plurality of pixels;
A data driver that generates a data signal and supplies the data signal to the display panel;
A gate driver supplying a gate signal to the display panel;
A temperature sensor disposed to correspond to the display panel and sensing a temperature of the display panel;
A temperature sensor driver for driving the temperature sensor;
A temperature processor that generates the temperature information in response to the output signal of the temperature sensor; And
And a controller that receives the first degradation information of the pixel and corrects the first degradation information to the temperature information to generate second degradation information.
According to claim 1,
The temperature sensor is disposed on the display panel between a plurality of horizontal sensor lines arranged in a first direction, a plurality of vertical sensor lines arranged in a second direction different from the first direction, and between the horizontal sensor line and the vertical sensor line. An organic light emitting display device including an insulating layer disposed.
According to claim 2,
The temperature sensor has a first switch part including a plurality of switches, one end of which is respectively connected to the plurality of horizontal sensor lines and the other end of which is respectively connected to a driving power source, and one end of which is connected to the plurality of vertical sensor lines and the other end of the temperature sensor. An organic light emitting display device comprising a second switch unit which is respectively connected to the driving power.
According to claim 3,
The temperature sensor driver is an organic light emitting display device that supplies a switching signal for driving the first switch unit and the second switch unit.
The method of claim 4,
The switching signal is an organic light emitting display device that sequentially turns on / off the switches included in the first switch unit and then turns on / off the switches included in the second switch unit.
According to claim 2,
The controller is an organic light emitting display device for determining the coordinates on the display panel corresponding to the plurality of horizontal sensor lines and the plurality of vertical sensor lines.
According to claim 1,
The temperature information corresponds to the resistance values of the plurality of horizontal sensor lines and the plurality of vertical sensor lines.
According to claim 2,
The display panel is divided into an opening area and a non-opening area, and the horizontal sensor line and the vertical sensor line are organic light emitting display devices disposed at positions corresponding to the non-opening area.
According to claim 1,
The controller is an organic light emitting display device that corrects an image signal in response to the second degradation information and transmits the corrected image signal to the data driver.
According to claim 1,
The controller,
A look-up table for storing correction values corresponding to temperature information;
An analog-to-digital converter that converts the temperature information transmitted from the temperature processor into digital temperature information, receives the correction value stored in the look-up table corresponding to the digital temperature information, and receives the first deterioration information from the second deterioration. An organic light emitting display device comprising a calculation unit for correcting and outputting information.
According to claim 1,
An organic light emitting display device in which a touch sensor is disposed on the display panel, and the temperature sensor is disposed between the display panel and the touch sensor.
According to claim 2,
At least one of the horizontal sensor line and the vertical sensor line is the horizontal sensor line and an organic light emitting display device including at least one of platinum, nickel, and copper corresponding to an area where the vertical sensor line overlaps.
According to claim 2,
The insulating layer is an organic light emitting display device disposed only in an area where the horizontal sensor line and the vertical sensor line overlap.
According to claim 2,
One of the horizontal sensor line or the vertical sensor line includes a bridge disposed above or below the insulating layer, and the bridge comprises at least one of platinum, nickel, and copper.

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