Display device, method of driving display device, and electronic device including display device

Abstract

The invention relates to a display device, a method of driving the display device, and an electronic device including the display device. The display device includes: a display panel including pixels each having a light emitting element between a first power line receiving a first power voltage and a second power line receiving a second power voltage, and an optical sensor including a light receiving element between a third power line receiving a reset voltage and the second power line; the at least one temperature sensor is used for sensing the temperature of the display panel; the power supply is used for providing a first power voltage, a second power voltage and a reset voltage; and a controller connected to the temperature sensor and the power supply. The controller controls the power supply such that a voltage value of the reset voltage changes based on a temperature of the display panel.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Korean Patent Application No. 10-2023-0152577 filed in the Korean Intellectual Property Office on November 7, 2023, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] The present disclosure relates to a display device and a method of driving the display device, and an electronic device including the display device. Background Art

[0004] A display device is a connecting medium between a user and information. Examples of display devices include liquid crystal display devices and organic light emitting display devices. Display devices can be applied to various electronic devices such as smart phones, digital cameras, notebook computers, navigation systems, and smart TVs.

[0005] The display panel of the display device may include an optical sensor to detect fingerprints and / or illumination intensity. However, the characteristics of the light receiving element included in the optical sensor may change according to temperature, making it more difficult to detect fingerprints and / or illumination intensity. Summary of the invention

[0006] Embodiments provide a display device and a method of driving the display device and an electronic device including the display device, in which a voltage supplied to an optical sensor is changed based on temperature, thereby being able to improve the accuracy of sensing.

[0007] According to an embodiment of the present disclosure, a display device is provided, which includes a display panel, at least one temperature sensor, a power supply and a controller. The display panel includes pixels and optical sensors, each of the pixels includes a light-emitting element located between a first power line receiving a first power voltage and a second power line receiving a second power voltage, and each of the optical sensors includes a light-receiving element located between a third power line receiving a reset voltage and a second power line. At least one temperature sensor is configured to sense the temperature of the display panel. The power supply is configured to provide a first power voltage, a second power voltage and a reset voltage. The controller is connected to the temperature sensor and the power supply. The controller controls the power supply so that the voltage value of the reset voltage changes based on the temperature of the display panel.

[0008] The power supply may change the reset voltage such that when the temperature of the display panel increases, a voltage difference between the reset voltage and the second power voltage decreases.

[0009] When the temperature of the display panel increases, the power supply may increase the voltage value of the second power voltage.

[0010] The power supply may change the reset voltage such that a voltage difference between the reset voltage and the second power voltage increases as the temperature of the display panel decreases.

[0011] When the temperature of the display panel decreases, the power supply may decrease a voltage value of the second power voltage.

[0012] The controller may include a storage device configured to store a lookup table including voltage values ​​of the second power voltage and voltage values ​​of the reset voltage corresponding to a plurality of temperature values.

[0013] Each of the optical sensors may include: a second transistor connected between a third power line and a first node, the second transistor including a gate electrode connected to a reset control line; a light receiving element connected between the first node and the second power line; a first transistor including a first electrode connected to a fourth power line receiving a common voltage and a gate electrode connected to the first node; and a third transistor connected between the second electrode of the first transistor and a readout line, the third transistor including a gate electrode connected to a sensing scan line.

[0014] The display device may further include: a reset circuit configured to generate a reset signal provided to a reset control line using a gate-on voltage provided from a power supply; a sensing scan driver configured to provide a sensing scan signal to the sensing scan line; and a readout circuit configured to receive a sensing signal from the readout line.

[0015] The controller may control the power supply so that a voltage value of the gate-on voltage changes based on a temperature of the display panel.

[0016] When the temperature of the display panel increases, the power supply may decrease the voltage value of the gate-on voltage, and when the temperature of the display panel decreases, the power supply may increase the voltage value of the gate-on voltage.

[0017] The controller may include a storage device configured to store a lookup table including voltage values ​​of the second power voltage, the reset voltage, and the gate-on voltage corresponding to a plurality of temperature values.

[0018] The display panel may be divided into at least two blocks, and optical sensors located in blocks different from each other may be connected to different reset control lines.

[0019] An optical sensor included in a first block of the at least two blocks may be connected to a first reset control line, and an optical sensor included in a second block different from the first block of the at least two blocks may be connected to a second reset control line. The first reset control line may be provided with a first reset signal from a first reset circuit, and the second reset control line may be provided with a second reset signal from a second reset circuit.

[0020] The power supply may provide a first gate-on voltage to the first reset circuit based on a temperature of the first block, and provide a second gate-on voltage to the second reset circuit based on a temperature of the second block.

[0021] According to another aspect of the present disclosure, a method for driving a display device including optical sensors is provided, each of the optical sensors having a light receiving element located between a first power line receiving a reset voltage and a second power line receiving a second power voltage, the method comprising: sensing the temperature of a display panel including the optical sensors; and changing the voltage values ​​of the reset voltage and the second power voltage provided to the optical sensors based on the temperature of the display panel.

[0022] When changing the voltage values ​​of the reset voltage and the second power voltage, the reset voltage and the second power voltage can be controlled so that when the temperature of the display panel increases, the voltage difference between the reset voltage and the second power voltage decreases, and when the temperature of the display panel decreases, the voltage difference between the reset voltage and the second power voltage increases.

[0023] Each of the optical sensors may include an N-type transistor connected between the first power line and the light receiving element, the N-type transistor being turned on by a reset signal. A voltage value of the reset signal may be changed based on a temperature of the display panel.

[0024] When the temperature of the display panel increases, the voltage value of the reset signal may decrease, and when the temperature of the display panel decreases, the voltage value of the reset signal may increase.

[0025] The display panel may be divided into a plurality of blocks, and a voltage of a reset signal provided to each of the plurality of blocks may be changed according to a temperature of the display panel.

[0026] According to another aspect of the present disclosure, an electronic device is provided, which includes a display panel, a voltage generating circuit, a temperature sensor and a controller. The display panel includes pixels and an optical sensor. The voltage generating circuit is configured to provide a first power voltage and a second power voltage to the pixels, and to provide a reset voltage and a second power voltage to the optical sensor. The temperature sensor is configured to sense the temperature of the display panel. The controller is configured to control the voltage generating circuit based on the temperature of the display panel sensed by the temperature sensor. The controller controls the voltage generating circuit so that the voltage values ​​of the reset voltage and the second power voltage change corresponding to the temperature of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a diagram illustrating a display device according to an embodiment of the present disclosure.

[0028] Figure 2 It is shown Figure 1FIG. 4 is a diagram of an embodiment of a drive circuit shown in FIG.

[0029] Figure 3 It is shown that the Figure 1 0 is a diagram of an embodiment of a display unit and a driving circuit in a display device shown in .

[0030] Figure 4 It is shown Figure 3 Circuit diagram of an embodiment of a pixel and an optical sensor shown in .

[0031] Figure 5 It is shown Figure 4 Waveform diagrams of an embodiment of the operation of a pixel and an optical sensor are shown in FIG.

[0032] Fig. 6A and Figure 6B is a diagram illustrating the location of a temperature sensor according to an embodiment of the present disclosure.

[0033] Figure 7 is a diagram illustrating a controller according to an embodiment of the present disclosure.

[0034] Figure 8 It is shown that the storage Figure 7 A diagram of the voltage information in the memory cell shown in FIG.

[0035] Fig. 9 is shown with Figure 8 The voltage information shown in the figure corresponds to the voltage difference.

[0036] Fig.10 It is shown that the storage Figure 7 A diagram of an implementation of a lookup table in a storage unit is shown in .

[0037] Fig.11 It is shown Fig.10 The voltage of the reset signal is shown in the diagram.

[0038] Fig.12 is a diagram illustrating a pixel unit according to an embodiment of the present disclosure.

[0039] Fig.13 is a diagram illustrating an electronic device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0040] Hereinafter, exemplary embodiments are described in detail with reference to the accompanying drawings so that those skilled in the art can practice the present disclosure. However, the present disclosure may be implemented in various different forms and is not limited to the exemplary embodiments described in this specification.

[0041] In order to clearly describe the present disclosure, parts irrelevant to the description may be omitted, and the same or similar constituent elements will be represented by the same reference numerals throughout the specification. Therefore, the same reference numerals may be used to identify the same or similar elements in different drawings.

[0042] In the present specification, the expression "equal" may mean "substantially equal." That is, it may mean equality to a degree that can be understood by those skilled in the art. Other expressions may be expressions in which "substantially" is omitted.

[0043] Some embodiments are described in the accompanying drawings according to function blocks, units and / or modules. It will be appreciated by those skilled in the art that these function blocks, units and / or modules can be physically implemented by logic circuits, discrete components, microprocessors, hard-wired circuits, memory elements, line connections and other electronic circuits. This can be formed using semiconductor-based manufacturing techniques or other manufacturing techniques. In the case where function blocks, units and / or modules are implemented by microprocessors or other similar hardware, function blocks, units and / or modules can be programmed and controlled using software to perform various functions discussed in the present disclosure, and can be selectively driven by firmware and / or software. In addition, each function block, each unit and / or each module can be implemented by dedicated hardware, or by a combination of dedicated hardware that performs some functions of function blocks, units and / or modules and processors (e.g., one or more programmed microprocessors and associated circuits) that perform other functions of function blocks, units and / or modules. In some embodiments, function blocks, units and / or modules can be physically divided into two or more separate function blocks, two or more separate units and / or two or more separate modules without departing from the scope of the present disclosure. Furthermore, in some embodiments, the functional blocks, units and / or modules may be physically combined into more complex functional blocks, more complex units and / or more complex modules without departing from the scope of the present disclosure.

[0044] On the other hand, the present disclosure is not limited to the embodiments disclosed below, and the present disclosure can be implemented in various forms. Each embodiment disclosed below can be implemented independently or combined with at least one other embodiment before being implemented.

[0045] Figure 1 is a diagram illustrating a display device according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 FIG. 4 is a diagram of an embodiment of a drive circuit shown in FIG.

[0046] refer to Figure 1The display device 1 can be applied to electronic devices such as computers, notebook computers (laptop computers), cellular phones, smart phones, personal digital assistants (PDAs), portable multimedia players (PMPs), digital TVs, digital cameras, portable game consoles, navigation devices, wearable devices, Internet of Things (IoT) devices, Internet of Everything (IoE) devices, electronic books (e-books), virtual reality (VR) devices, augmented reality (AR) devices, vehicle navigation systems, video phones, observation systems, autofocus systems, tracking systems, and motion sensing systems.

[0047] The display device 1 may include a panel 10 and a driving circuit unit 20 for driving the panel 10. In addition, the display device 1 may further include an application processor (AP) 30, or the display device 1 is connected to the application processor 30.

[0048] The panel 10 may include a display unit 110 (or display panel) and a sensor unit 120 (or sensor panel). The display unit 110 may display an image and sense a touch input (e.g., fingerprint sensing). The sensor unit 120 may sense (or detect) an external input such as a touch, pressure, fingerprint, or hovering. For example, the panel 10 may include pixels PX and optical sensors PHS, and a sensor SC (or touch sensor) positioned while overlapping at least some of the pixels PX and the optical sensors PHS. In an embodiment, the sensor SC may include a first sensor TX (or a driving electrode) and a second sensor RX (or a sensing electrode). In another embodiment (e.g., a self-capacitance method), the sensor SC may be configured with a type of sensor without distinguishing the first sensor TX and the second sensor RX from each other.

[0049] The driving circuit unit 20 may include a driving circuit 210 for driving the display unit 110 and a touch sensor driver 220 for driving the sensor unit 120. For example, the pixel PX may display an image by using a display frame period as a unit. For example, the sensor SC may sense a user's input by using a sensing frame period as a unit. The sensing frame period and the display frame period may be independent of or different from each other. The sensing frame period and the display frame period may be synchronized or asynchronous with each other.

[0050] In some embodiments, after the display unit 110 and the sensor unit 120 are manufactured separately from each other, the display unit 110 and the sensor unit 120 may be arranged and / or coupled to overlap each other in at least one region. In another embodiment, the display unit 110 and the sensor unit 120 may be manufactured integrally. For example, the sensor unit 120 may be directly formed on one of various types of functional layers (e.g., an optical layer or a protective layer), at least one substrate constituting the display unit 110 (e.g., an upper substrate and / or a lower substrate of a display panel or a thin film encapsulation layer), or another insulating layer.

[0051] Although the sensor unit 120 is Figure 1 Although shown as being disposed on the front surface (e.g., the upper surface on which an image is displayed) of the display unit 110, the position of the sensor unit 120 is not limited thereto. For example, the sensor unit 120 may be disposed on the rear surface or both surfaces of the display unit 110. In another embodiment, the sensor unit 120 may be disposed in at least one edge region of the display unit 110.

[0052] The display unit 110 may include a display substrate 111, and a plurality of pixels PX and a plurality of optical sensors PHS formed on the display substrate 111. The pixels PX may be disposed in a display area DA of the display substrate 111. The optical sensors PHS may be disposed in the display area DA of the display substrate 111.

[0053] The display substrate 111 may include a display area DA in which an image is displayed and a non-display area NDA disposed at the periphery of the display area DA in which no image is displayed. In some embodiments, the display area DA may be disposed in a central area of ​​the display unit 110, and the non-display area NDA may be disposed in an edge area of ​​the display unit 110 to surround the display area DA.

[0054] The display substrate 111 may be a rigid substrate or a flexible substrate, but the material or characteristics of the display substrate 111 are not limited thereto. For example, the display substrate 111 may be a rigid substrate made of glass or tempered glass, or may be a flexible substrate configured with a thin film made of plastic or metal.

[0055] The pixel PX may be disposed in the display area DA. The pixel PX may display a predetermined image corresponding to a data signal. In the present disclosure, the structure, driving method, etc. of the pixel PX are not particularly limited. For example, each of the pixels PX may be implemented as a pixel having various structures and / or various driving methods.

[0056] The optical sensor PHS may be included in the display area DA. The optical sensor PHS may be designated as a sensor pixel. The optical sensor PHS may include a light receiving element including a light receiving layer. In the display area DA, the light receiving layer of the light receiving element may be disposed to be spaced apart from the light emitting layer of the light emitting element.

[0057] In an embodiment, a plurality of optical sensors PHS may be distributed throughout the display area DA while being spaced apart from each other. However, this is merely illustrative. For example, some of the optical sensors PHS may be included in at least a portion of the non-display area NDA.

[0058] In an embodiment, the optical sensor PHS is configured to sense light emitted from a light source (e.g., a light emitting element of each of the pixels PX) reflected by an external object (e.g., a user's finger, etc.). For example, a user's fingerprint may be sensed by the optical sensor PHS. For example, illumination intensity may be sensed by the optical sensor PHS. In various embodiments, the optical sensor PHS may sense various biometric information such as irises and veins.

[0059] Various types of lines and / or built-in circuits connected to the pixels PX and / or the optical sensor PHS of the display area DA may be provided in the non-display area NDA. In an example, a plurality of lines for supplying various power supplies (or power supply voltages) and various control signals to the display area DA may be provided in the non-display area NDA. In addition, a scan driver may also be provided in the non-display area NDA.

[0060] In the present disclosure, the type of display unit 110 is not particularly limited. For example, the display unit 110 can be implemented as a self-luminous display panel, such as an organic light-emitting display panel. However, when the display unit 110 is implemented as a self-luminous display panel, each of the pixels PX is not necessarily limited to the case where the pixel PX only includes an organic light-emitting element. For example, the light-emitting element of each of the pixels PX can be configured as an organic light-emitting diode, an inorganic light-emitting diode, a quantum dot / quantum well light-emitting diode, etc. In some embodiments, a plurality of light-emitting elements can be provided in each of the pixels PX. A plurality of light-emitting elements can be connected in series, in parallel, or in series-parallel.

[0061] The sensor unit 120 may include a sensor substrate 121 and a plurality of sensors SC formed on the sensor substrate 121. The sensors SC may be disposed in a sensing area SA on the sensor substrate 121.

[0062] The sensor substrate 121 may include a sensing area SA capable of sensing a touch input, etc., and a peripheral area NSA disposed at the periphery of the sensing area SA. In some embodiments, the sensing area SA may be disposed to overlap with at least one area of ​​the display area DA. In an example, the sensing area SA may be disposed to correspond to an area of ​​the display area DA (e.g., an area overlapping the display area DA), and the peripheral area NSA may be disposed to correspond to an area of ​​the non-display area NDA (e.g., an area overlapping the non-display area NDA). When a touch input, etc. is provided on the display area DA, the touch input may be detected by the sensor unit 120.

[0063] The sensor substrate 121 may be a rigid substrate or a flexible substrate. In addition, the sensor substrate 121 may be configured with at least one insulating layer. In addition, the sensor substrate 121 may be a transparent or translucent light-transmitting substrate, but the present disclosure is not limited thereto. That is, in the present disclosure, the material and properties of the sensor substrate 121 are not particularly limited. In some embodiments, at least one substrate constituting the display unit 110 (e.g., a display substrate 111, an encapsulation substrate, and / or a thin film encapsulation layer) or at least one insulating layer, at least one functional layer, etc. disposed at the inner side and / or outer surface of the display unit 110 may be used as the sensor substrate 121.

[0064] The sensing area SA is set as an area that can respond to or react to a touch input (ie, an active area of ​​a sensor). A sensor SC for sensing a touch input, etc. may be set in the sensing area SA. In some embodiments, the sensor SC may include a first sensor TX and a second sensor RX.

[0065] For example, each of the first sensors TX may extend in the first direction DR1. The first sensors TX may be arranged in the second direction DR2. The second direction DR2 may be different from the first direction DR1. For example, the second direction DR2 may be a direction orthogonal to the first direction DR1. Each of the first sensors TX may have a form in which a first unit having a relatively wide area and a first bridge having a relatively narrow area are connected to each other. Although Figure 1 In the embodiment, each of the first units is shown as having a diamond shape, but each of the first units can be configured in various shapes, including a circular shape, other quadrilateral shapes, a triangular shape, or a mesh shape. For example, the first bridge can be integrally formed on the same layer as the first unit. In another embodiment, the first bridge can be formed in a layer different from the layer of the first unit to electrically connect adjacent first units to each other.

[0066] For example, each of the second sensors RX may extend in the second direction DR2. The second sensors RX may be arranged in the first direction DR1. Each of the second sensors RX may have a form in which a second unit (or sensing electrode) having a relatively wide area and a second bridge having a relatively narrow area are connected to each other. Figure 1 In the embodiment, each of the second units is shown as having a diamond shape, but each of the second units can be configured in various shapes, including a circular shape, other quadrilateral shapes, a triangular shape, or a mesh shape. For example, the second bridge can be integrally formed on the same layer as the second unit. In another embodiment, the second bridge can be formed in a layer different from the layer of the second unit to electrically connect adjacent second units to each other.

[0067] In some embodiments, each of the first sensor TX and the second sensor RX may include at least one of a metal material, a transparent conductive material, and various other conductive materials, thereby having conductivity. In an example, the first sensor TX and the second sensor RX may include at least one of various metal materials including gold (Au), silver (Ag), aluminum (Al), molybdenum (Mo), chromium (Cr), titanium (Ti), nickel (Ni), neodymium (Nd), copper (Cu), platinum (Pt), etc. and alloys thereof. The first sensor TX and the second sensor RX may be configured in a mesh shape. In addition, the first sensor TX and the second sensor RX may include a material including silver nanowires (AgNW), indium tin oxide (ITO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), antimony zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), tin oxide (SnO 2 ), carbon nanotubes, graphene, etc. In addition, the first sensor TX and the second sensor RX may include at least one of various conductive materials to have conductivity. Although each of the first sensor TX and the second sensor RX may be configured as a single layer or a multilayer, its cross-sectional structure is not limited thereto.

[0068] On the other hand, sensor lines for electrically connecting the first and second sensors TX and RX to the touch sensor driver 220 and the like may be concentrically disposed in the peripheral area NSA.

[0069] The driving circuit unit 20 may include a driving circuit 210 for driving the display unit 110 and a touch sensor driver 220 for driving the sensor unit 120. In an embodiment, the touch sensor driver 220 may be implemented as an integrated circuit (IC) (eg, a sensor IC (T-IC)).

[0070] The touch sensor driver 220 may be electrically connected to the sensor unit 120 to drive the sensor unit 120. The touch sensor driver 220 may include a sensor transmitter and a sensor receiver. In some embodiments, the sensor transmitter and the sensor receiver may be integrated into one IC, but the present disclosure is not limited thereto.

[0071] In an embodiment, the touch sensor driver 220 may periodically set / update offset data (or baseline) corresponding to a state in which no input is caused by the object, and sense the input caused by the object by reflecting the offset data in a sensing signal to accurately detect the input caused by the object.

[0072] The driving circuit 210 may include Figure 2 . The panel driver 212 and the sensor driver 214 are shown in FIG. The panel driver 212 and the sensor driver 214 may be implemented as independent ICs or as one IC. For example, at least a portion of the sensor driver 214 may be included in the panel driver 212 or may operate in conjunction with the panel driver 212.

[0073] The panel driver 212 may scan the pixels PX of the display area DA and provide a data signal corresponding to image data (or an image) to the pixels PX. The display unit 110 may display an image corresponding to the data signal.

[0074] For example, the panel driver 212 may provide a data signal to the pixel PX. In an embodiment, the panel driver 212 may include a data driver (e.g., a first driver circuit) and a timing controller (e.g., a controller circuit), and a scan driver (e.g., a second driver circuit) may be separately installed in the non-display area NDA of the display unit 110. In an embodiment, the panel driver 212 may include all or at least some of the data driver, the timing controller, and the scan driver.

[0075] In an embodiment, the panel driver 212 may provide a driving signal for optical sensing (e.g., fingerprint sensing) to the pixel PX. The driving signal may be provided to allow the pixel PX to emit light, thereby operating as a light source for the optical sensor PHS. In an embodiment, the panel driver 212 may provide a driving signal for optical sensing and / or another driving signal to the optical sensor PHS. However, this is merely illustrative, and the driving signal for optical sensing may be provided by the sensor driver 214.

[0076] The sensor driver 214 may detect biometric information such as a fingerprint of a user based on a sensing signal received from the optical sensor PHS. In addition, the sensor driver 214 may sense illumination intensity based on a sensing signal received from the optical sensor PHS.

[0077] The application processor 30 may be electrically connected to the driving circuit 210, and provide a timing signal and a grayscale for displaying a frame period to the driving circuit 210. In addition, the application processor 30 may be electrically connected to the touch sensor driver 220, and receive a sensing signal from the touch sensor driver 220, or receive input information (e.g., input caused by an object and its position).

[0078] The application processor 30 may correspond to at least one of a graphics processing unit (GPU), a central processing unit (CPU), an application processor (AP), and the like.

[0079] Figure 3 It is shown that the Figure 1 2 is a diagram of an embodiment of a display unit (eg, 110 ) and a driving circuit (eg, 210 ) in a display device shown in .

[0080] refer to Figures 1 to 3 , the pixel unit 112 may include a signal line, a pixel PX, and an optical sensor PHS. The signal line may include a scan line S1, ..., Si, ..., and Sn, a data line D1, ..., Dj, ..., and Dm, a readout line RX1, ..., RXk, ..., and RXo, a sensing scan line SS1, ..., SSi, ..., and SSn, and a reset control line RSTL (or a reset line). Here, each of n, m, and o may be a natural number of 2 or more.

[0081] The pixels PX may be disposed or positioned in a region (e.g., a pixel region) defined by the scan lines S1 to Sn and the data lines D1 to Dm. The optical sensor PHS may be disposed or positioned in a region defined by the sensing scan lines SS1 to SSn and the readout lines RX1 to RXo. The pixels PX and the optical sensor PHS may be arranged in a two-dimensional array in the display area DA, but the present disclosure is not limited thereto.

[0082] Each of the pixels PX may be electrically connected to at least one of the scan lines S1 to Sn and one of the data lines D1 to Dm. Each of the optical sensors PHS may be electrically connected to one of the sensing scan lines SS1 to SSn, one of the readout lines RX1 to RXo, and a reset control line RSTL. Figure 4 A connection configuration among the pixels PX, the optical sensor PHS, and the signal lines is described.

[0083] The driving circuit 210 may include a scan driver 2121 , a data driver 2122 , a controller 2123 (or a timing controller), a power supply 2124 , a temperature sensor (TES) 2125 , a reset circuit 2141 , a readout circuit 2142 , and a sensing scan driver 2143 .

[0084] For example, the scan driver 2121, the data driver 2122, the controller 2123, the power supply 2124, and the TES 2125 may be included in the panel driver 212, and the reset circuit 2141, the readout circuit 2142, and the sensing scan driver 2143 may be included in the sensor driver 214. However, the present disclosure is not limited thereto. For example, the reset circuit 2141 may be included in the panel driver 212.

[0085] The scan driver 2121 may be electrically connected to the pixels PX through the scan lines S1 to Sn. The scan driver 2121 may generate a scan signal based on a scan control signal SCS (or a gate control signal) and provide the scan signal to the scan lines S1 to Sn. The scan control signal SCS may include a start signal, a clock signal, etc., and is provided to the scan driver 2121 from the controller 2123.

[0086] The scan driver 2121 may be formed together with the pixel PX. However, the scan driver 2121 is not limited thereto. For example, the scan driver 2121 may be implemented as an integrated circuit.

[0087] The pixel PX selectively driven by the scan driver 2121 may emit light having a brightness corresponding to a data signal provided from the data line. For example, the pixel PXij selectively driven by the i-th scan line Si may emit light having a brightness corresponding to a data signal provided from the j-th data line Dj (each of i and j is a natural number greater than 0).

[0088] The data driver 2122 may generate a data signal (or data voltage) based on the image data DATA2 and the data control signal DCS provided from the controller 2123, and provide the data signal to the pixel unit 112 (or pixel PX) through the data lines D1 to Dm. The data control signal DCS is a signal for controlling the operation of the data driver 2122, and may include a data enable signal (or load signal) for instructing the output of a valid data signal, a horizontal start signal, a data clock signal, etc.

[0089] The controller 2123 may receive input image data DATA1 and a control signal CS from an external device (e.g., a graphics processor or an application processor), generate a scan control signal SCS and a data control signal DCS based on the control signal CS, and generate image data DATA2 by converting the input image data DATA1. The control signal CS may include a vertical synchronization signal, a horizontal synchronization signal, and a reference clock signal. The vertical synchronization signal may indicate the start of a frame data (i.e., data corresponding to a frame period in which one frame image is displayed), and the horizontal synchronization signal may indicate the start of a data row (i.e., one of a plurality of data rows included in the frame data). The controller 2123 may convert the input image data DATA1 into image data DATA2 having a format corresponding to the pixel arrangement in the pixel unit 112. In addition, the controller 2123 may generate a reset control signal, a readout control signal RCS, and a sensing control signal CCS based on the control signal CS.

[0090] In an embodiment, the controller 2123 controls the power supply 2124 so that the second power voltage VSS supplied to the pixel PX and the optical sensor PHS is changed based on the temperature of the pixel unit 112 sensed by the TES 2125. The second power voltage VSS may correspond to Figure 4 In an example, when the temperature of the pixel unit 112 increases, the second power voltage VSS may increase.

[0091] In an embodiment, the controller 2123 controls the power supply 2124 so that the voltage supplied to the optical sensor PHS is changed based on the temperature of the pixel unit 112 sensed by the temperature sensor 2125. When the voltage supplied to the optical sensor PHS is controlled corresponding to the temperature, a sensing error of the optical sensor PHS corresponding to the temperature change can be minimized.

[0092] The light receiving element LRD may be included in each of the optical sensors PHS, such as Figure 4 As shown in . The amount of current flowing through the light receiving element LRD may change based on temperature. In an example, when the temperature of the pixel unit 112 increases, the amount of current flowing through the light receiving element LRD may increase. When the amount of current flowing through the light receiving element LRD changes corresponding to the temperature, the sensing accuracy of the optical sensor PHS may become low.

[0093] In an embodiment of the present disclosure, the controller 2123 controls the power supply 2124 based on the temperature of the pixel unit 112 sensed by the TES 2125. Corresponding to the control of the controller 2123, the power supply 2124 can control the reset voltage VRST and / or the gate-on voltage VGON provided to the optical sensor PHS so that the amount of current flowing through the light receiving element LRD is maintained substantially similar (or equal) regardless of the temperature change of the pixel unit 112.

[0094] The power supply 2124 may provide power voltages VDD, VSS, VRST, VCOM, and VGON for driving the pixels PX and the optical sensor PHS. Figure 3 , there are shown some power voltages VDD, VSS, VRST, VCOM, and VGON generated by the power supply 2124. The power supply 2124 may additionally generate various power voltages corresponding to the structures of the pixel PX and the optical sensor PHS.

[0095] The first power voltage VDD may be a power supply that provides a driving current to the pixel PX. The second power voltage VSS may be a power supply that provides a driving current from the pixel PX. During a period in which the pixel PX is set to be in an emission state, the first power voltage VDD may be set to a voltage higher than the second power voltage VSS. The reset voltage VRST may be a voltage for initializing the optical sensor PHS. The common voltage VCOM may be a voltage provided to the optical sensor PHS. The gate-on voltage VGON may be provided to the reset circuit 2141.

[0096] In an embodiment, the power supply 2124 may control at least one voltage of the second power voltage VSS, the reset voltage VRST, and the gate-on voltage VGON corresponding to the control of the controller 2123 (or corresponding to the temperature detected by the TES 2125 ).

[0097] The TES 2125 may sense the temperature of the pixel unit 112 and provide sensed temperature information based on the sensed temperature to the controller 2123 or provide sensed temperature information indicating the sensed temperature to the controller 2123. The controller 2123 may control the power supply 2124 based on the temperature information of the pixel unit 112.

[0098] In an embodiment, the reset circuit 2141 is commonly connected to all optical sensors PHS provided in the pixel unit 112 through one reset control line RSTL. The reset circuit 2141 may provide a reset signal RST to the optical sensors PHS simultaneously in response to the reset control signal. The reset signal RST may be a control signal for providing a reset voltage VRST to the optical sensors PHS. When the reset signal RST is provided to the optical sensors PHS simultaneously, the reset signal RST may be designated as a global reset signal.

[0099] In an embodiment, the reset circuit 2141 generates a reset signal RST using a gate-on voltage VGON. In an example, a high voltage of the reset signal RST may correspond to the gate-on voltage VGON. The gate-on voltage VGON may change based on the temperature of the pixel unit 112, and the reset circuit 2141 may provide a reset signal RST having a different gate-on voltage VGON to the reset control line RSTL based on the temperature of the pixel unit 112.

[0100] The readout circuit 2142 may receive a sensing signal from the optical sensor PHS through the readout lines RX1 to RXo and perform signal processing on the sensing signal. For example, the readout circuit 2142 may perform a correlated double sampling (CDS) operation for removing noise from the sensing signal provided from the optical sensor PHS.

[0101] The sensing scan driver 2143 may be electrically connected to the optical sensor PHS through the sensing scan lines SS1, ..., SSi, ..., and SSn. The sensing scan driver 2143 may generate a sensing scan signal based on the sensing control signal CCS and provide the sensing scan signal to the sensing scan lines SS1 to SSn. That is, the sensing scan driver 2143 may select the optical sensor PHS while scanning the pixel unit 112. The sensing scan driver 2143 may be formed in the pixel unit 112 together with the optical sensor PHS. However, the sensing scan driver 2143 is not limited thereto. For example, the sensing scan driver 2143 may be implemented as an integrated circuit.

[0102] The optical sensor PHS selectively driven by the sensing scan driver 2143 may output an electrical signal (i.e., a sensing signal, such as a current / voltage) corresponding to the sensing light to a readout line. For example, the optical sensor PHSik selectively driven by the i-th sensing scan line SSi may output an electrical signal corresponding to the sensing light to the k-th readout line RXk (k is a natural number greater than 0).

[0103] The readout circuit 2142 may convert the sensing signal in analog form into a signal in digital form (or a digital value). The sensed signal (or the sensing signal in digital form) read out may be provided to an external device as a sensing data. In an embodiment, biometric authentication (e.g., fingerprint authentication) may be performed based on the sensing data.

[0104] Figure 4 It is shown Figure 3 A circuit diagram of an embodiment of a pixel and an optical sensor is shown in FIG. For ease of description, Figure 4 , a pixel PXij located on the i-th horizontal line (or the i-th pixel row) and connected to the j-th data line Dj is shown. Figure 4 FIG. 4 shows an optical sensor PHSik located on an i-th horizontal line (or an i-th pixel row) and connected to a k-th readout line RXk. The i-th scanning lines S1i to S4i may include Figure 3 In the i-th scanning line Si shown in .

[0105] refer to Figure 4 , the pixel PXij and the optical sensor PHSik may be located on the i-th horizontal line. The pixel PXij may include a light emitting element LD and a pixel circuit PXC. In an embodiment, the pixel circuit PXC may include a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, a storage capacitor Cst, and a boost capacitor Cbst.

[0106] The first transistor T1 (or driving transistor) may be connected between the first power line PL1 and the first electrode of the light emitting element LD. The first transistor T1 may include a gate electrode connected to the first node N1. The first transistor T1 may control the amount of current (or driving current) flowing from the first power line PL1 to the electrode EP (or the second power line) via the light emitting element LD based on the voltage of the first node N1. The first power voltage VDD may be provided to the first power line PL1, and the second power voltage VSS may be provided to the electrode EP. In an embodiment, the first power voltage VDD is higher than the second power voltage VSS.

[0107] The second transistor T2 may be connected between the j-th data line Dj and the second node N2. The gate electrode of the second transistor T2 may be connected to the 1i-th scan line S1i (or the first scan line). When the first scan signal GW[i] (e.g., the first scan signal GW[i] having a low level) is provided to the 1i-th scan line S1i, the second transistor T2 may be turned on to electrically connect the j-th data line Dj and the second node N2 to each other. When each of the first transistor T1 and the third transistor T3 is in a turned-on state, the second transistor T2 may transmit the data signal of the j-th data line Dj to the first node N1 in response to the first scan signal GW[i].

[0108] The third transistor T3 may be connected between the first node N1 and the third node N3. The gate electrode of the third transistor T3 may be connected to the 4i-th scan line S4i (or the fourth scan line). When the fourth scan signal GC[i] is provided to the 4i-th scan line S4i, the third transistor T3 may be turned on. When the third transistor T3 is turned on, the first transistor T1 may be diode-connected.

[0109] The fourth transistor T4 may be connected between the first node N1 and the second power line PL2. The gate electrode of the fourth transistor T4 may be connected to the 2i-th scan line S2i (or the second scan line). The first initialization power voltage Vint1 may be provided to the second power line PL2. The fourth transistor T4 may be turned on by the second scan signal GI[i] provided to the 2i-th scan line S2i. When the fourth transistor T4 is turned on, the first initialization power voltage Vint1 may be provided to the first node N1 (i.e., the gate electrode of the first transistor T1).

[0110] The fifth transistor T5 may be connected between the first power line PL1 and the second node N2. The gate electrode of the fifth transistor T5 may be connected to the i-th emission control line Ei. The sixth transistor T6 may be connected between the third node N3 and the light emitting element LD (or the fourth node N4). The gate electrode of the sixth transistor T6 may be connected to the i-th emission control line Ei. When the emission control signal EM[i] (for example, the emission control signal EM[i] having a high level) is provided to the i-th emission control line Ei, the fifth transistor T5 and the sixth transistor T6 may be turned off, and may be turned on in other cases.

[0111] The seventh transistor T7 may be connected between the first electrode (i.e., the fourth node N4) of the light emitting element LD and the third power line PL3. The gate electrode of the seventh transistor T7 may be connected to the 3i-th scan line S3i. The second initialization power voltage Vint2 may be provided to the third power line PL3. In some embodiments, the second initialization power voltage Vint2 may be equal to or different from the first initialization power voltage Vint1. The seventh transistor T7 may be turned on by the third scan signal GB[i] provided to the 3i-th scan line S3i to provide the second initialization power voltage Vint2 to the first electrode of the light emitting element LD.

[0112] The storage capacitor Cst may be connected or formed between the first power line PL1 and the first node N1.

[0113] The boosting capacitor Cbst may be connected or formed between the gate electrode of the second transistor T2 and the gate electrode of the first transistor T1 .

[0114] The optical sensor PHSik may include a sensor circuit SCa and a light receiving element LRD. The sensor circuit SCa may include a first transistor M1, a second transistor M2, and a third transistor M3. The first transistor M1 and the third transistor M3 may be connected in series between the second power line PL12 and the kth readout line RXk (k is a natural number greater than 0).

[0115] The first transistor M1 (or the first sensor transistor) may be connected between the second power line PL12 (or the fourth power line) and the third transistor M3. The gate electrode of the first transistor M1 may be connected to the first node N11 (or the sensor node), and the first electrode thereof is connected to the second power line PL12 receiving the common voltage VCOM. The first transistor M1 may control the current flowing from the second power line PL12 through the third transistor M3 to the kth readout line RXk in response to the voltage of the first node N11. The common voltage VCOM may be provided to the second power line PL12.

[0116] In some embodiments, the second power line PL12 may be electrically connected to the third power line PL3 or formed integrally with the third power line PL3, and the common voltage VCOM applied to the second power line PL12 may be equal to the second initialization power voltage Vint2. However, the present disclosure is not limited thereto. For example, the second power line PL12 may be electrically connected to the second power line PL2 or formed integrally with the second power line PL2, and the common voltage VCOM applied to the second power line PL12 may be equal to the first initialization power voltage Vint1.

[0117] The third transistor M3 (second sensor transistor or switch transistor) may be connected between the first transistor M1 (eg, the second electrode of the first transistor M1) and the kth readout line RXk. A gate electrode of the third transistor M3 may be connected to the i-th sensing scan line SSi.

[0118] The second transistor M2 (or the third sensor transistor) may be connected between the first power line PL11 (or the third power line) and the first node N11. A gate electrode of the second transistor M2 may be connected to the reset control line RSTL. A reset voltage VRST may be provided to the first power line PL11.

[0119] At least one light receiving element LRD may be connected between the first node N11 and the electrode EP to which the second power voltage VSS is supplied.

[0120] The light receiving element LRD may generate charge (or current) based on incident light. That is, the light receiving element LRD may perform a photoelectric conversion function. For example, the light receiving element LRD may be implemented as a photodiode.

[0121] When the second transistor M2 is turned on by the reset signal RST supplied to the reset control line RSTL, the reset voltage VRST may be supplied to the first node N11. For example, the voltage of the first node N11 may be reset by the reset voltage VRST. The light receiving element LRD may perform a photoelectric conversion function after the reset voltage VRST is applied to the first node N11.

[0122] The voltage of the first node N11 can be changed by the operation of the light receiving element LRD. The voltage of the first node N11 (or the charge or current generated in the light receiving element LRD) can be changed according to the intensity of light incident on the light receiving element LRD and the time of light incidence (or the time the light receiving element LRD is exposed to light).

[0123] When the third transistor M3 is turned on by the sensing scan signal SCAN[i] supplied to the i-th sensing scan line SSi, a detection value (current and / or voltage) generated based on the voltage of the first node N11 may flow in the k-th readout line RXk.

[0124] In an embodiment, each of the pixel circuit PXC and the sensor circuit SCa includes a P-type transistor and an N-type transistor. In an embodiment, the third transistor T3, the fourth transistor T4, the second transistor M2, and the third transistor M3 are formed by an oxide semiconductor transistor including an oxide semiconductor. For example, the third transistor T3, the fourth transistor T4, the second transistor M2, and the third transistor M3 can be implemented with an N-type oxide semiconductor transistor and include an oxide semiconductor layer as an active layer.

[0125] The oxide semiconductor transistor can be formed by a low temperature process and has a charge mobility lower than that of a polysilicon semiconductor transistor. That is, the oxide semiconductor transistor has an excellent cut-off current characteristic. Therefore, the leakage current in the third transistor T3, the fourth transistor T4, the second transistor M2, and the third transistor M3 can be minimized.

[0126] Other transistors T1, T2, T5, T6, T7 and M1 can be formed with polycrystalline silicon semiconductor transistors including silicon semiconductors, and include a polycrystalline silicon semiconductor layer as an active layer. For example, the active layer can be formed by a low temperature polycrystalline silicon (LTPS) process. For example, the polycrystalline silicon semiconductor transistor can be a P-type polycrystalline silicon transistor. Since the polycrystalline silicon semiconductor transistor has a high response speed, the polycrystalline silicon semiconductor transistor can be applied to a switch element that needs to be switched quickly.

[0127] When the third transistor M3 is implemented as an oxide semiconductor transistor, current leaked through the kth readout line RXk may be minimized. Therefore, the sensing sensitivity of the optical sensor PHS including the sensor circuit SCa may be improved.

[0128] Figure 5 It is shown Figure 4 Waveform diagrams of an embodiment of the operation of a pixel and an optical sensor are shown in FIG.

[0129] refer to Figure 4 and Figure 5 , the emission control signal EM[i] may be provided to the i-th emission control line Ei, the second scan signal GI[i] may be provided to the 2i-th scan line S2i, the fourth scan signal GC[i] may be provided to the 4i-th scan line S4i, the third scan signal GB[i] may be provided to the 3i-th scan line S3i, and the first scan signal GW[i] may be provided to the 1i-th scan line S1i. The reset signal RST may be provided to the reset control line RSTL. The sensing scan signal SCAN[i] may be provided to the i-th sensing scan line SSi.

[0130] The sensing scan signal SCAN[i] (or the i-th sensing scan signal) may refer to a signal provided to the gate electrode of the third transistor M3. When the sensing scan signal SCAN[i] is provided, a detection value may be provided to the k-th readout line RXk. That is, when the sensing scan signal SCAN[i] is provided, a fingerprint and a touch input of a user may be detected. To this end, the sensing scan signal SCAN[i] may be provided at least once during one frame period.

[0131] The k-th frame period FRAME_k may include a non-emission period P_NE, and the non-emission period P_NE (or the k-th frame period FRAME_k) may include an initialization period P_INT, a compensation period P_C, and a write period P_W. The write period P_W may be included in the compensation period P_C. For example, the write period P_W may correspond to 1 horizontal time, each of the initialization period P_INT and the compensation period P_C may correspond to 6 horizontal times, and the non-emission period P_NE may correspond to 26 horizontal times. However, the present disclosure is not limited thereto.

[0132] In the non-emission period P_NE, the emission control signal EM[i] may have a high level. In response to the emission control signal EM[i] having a high level, the fifth transistor T5 and the sixth transistor T6 may be turned off, and the pixel PXij does not emit light.

[0133] In the initialization period P_INT, the second scan signal GI[i] may have a high level. In response to the second scan signal GI[i] having a high level, the fourth transistor T4 may be turned on, and the first initialization power voltage Vint1 of the second power line PL2 may be provided to the first node N1 (or the gate electrode of the first transistor T1).

[0134] Thereafter, during the compensation period P_C, the fourth scan signal GC[i] may have a high level. The third transistor T3 may be turned on in response to the fourth scan signal GC[i] having a high level, and the first transistor T1 becomes diode-connected.

[0135] In the write period P_W, the first scan signal GW[i] may have a low level. The second transistor T2 may be turned on in response to the first scan signal GW[i] having a low level, and may provide a data signal from the j-th data line Dj to the second node N2. In addition, since the third transistor T3 is in a turned-on state in response to the fourth scan signal GC[i] having a high level, the data signal may be transmitted from the second node N2 to the first node N1 through the first transistor T1 and the third transistor T3. Since the first transistor T1 is maintained in a diode connection state by the turned-on third transistor T3, the first node N1 may have a voltage obtained by compensating for the threshold voltage of the first transistor in the data signal.

[0136] Before the write period P_W, the third scan signal GB[i] may have a low level. The seventh transistor T7 may be turned on in response to the third scan signal GB[i] having a low level, and the second initialization power voltage Vint2 may be provided to the first electrode of the light emitting element LD. The third scan signal GB[i] may be the first scan signal provided to the previous row, but the present disclosure is not limited thereto.

[0137] After that, the non-emission period P_NE may end, and the emission control signal EM[i] may have a low level. The fifth transistor T5 and the sixth transistor T6 may be turned on in response to the emission control signal EM[i] having a low level, and a current flow path from the first power line PL1 to the electrode EP may be formed through the fifth transistor T5, the first transistor T1, the sixth transistor T6, and the light emitting element LD. A driving current corresponding to a voltage (e.g., a data signal) of the first node N1 may flow through the light emitting element LD according to the operation of the first transistor T1, and the light emitting element LD may emit light having a brightness corresponding to the driving current.

[0138] On the other hand, the reset signal RST may have a high level in the reset period P_RST before the k-th frame period FRAME_k. The reset circuit 2141 may provide the reset signal RST having a high level to the reset control line RSTL. The second transistor M2 may be turned on in response to the reset signal RST having a high level, and a reset voltage VRST may be applied to the first node N11. The voltage of the first node N11 may be reset by the reset voltage VRST.

[0139] Thereafter, the second transistor M2 may be turned off in response to the reset signal RST having a low level. When light is incident on the light receiving element LRD during the exposure time EIT, the voltage of the first node N11 may be changed by a photoelectric conversion function of the light receiving element LRD.

[0140] The sensing scan signal SCAN[i] may have a high level in the sensing scan period P_SC of the k-th frame period FRAME_k. Figure 5 , it is shown that the sensing scanning period P_SC and the initialization period P_INT are the same period. However, the embodiment is not limited thereto, and the position of the sensing scanning period P_SC may be differently set.

[0141] The third transistor M3 may be turned on in response to the sensing scan signal SCAN[i], and a current (or a detection value) may flow from the second power line PL12 to the kth readout line RXk corresponding to the voltage of the first node N11.

[0142] For example, when a user's touch input occurs in the pixel unit 112, a current may be output in the kth frame period FRAME_k, that is, a detection value corresponding to light reflected by the user (e.g., the user's finger). For example, the user's fingerprint may be sensed based on the detection value. For example, the user's touch input may be sensed based on the detection value.

[0143] Fig. 6A and Figure 6Bis a diagram illustrating the location of a temperature sensor according to an embodiment of the present disclosure.

[0144] refer to Fig. 6A , the temperature sensor 2125 is disposed to overlap with the pixel unit 112. In an example, the temperature sensor 2125 may be located at a central portion of the pixel unit 112, and provide the controller 2123 with temperature information corresponding to the temperature of the central portion of the pixel unit 112. In an embodiment, the controller 2123 calculates the total temperature of the pixel unit 112 based on the temperature of the central portion of the pixel unit 112.

[0145] refer to Figure 6B , at least two temperature sensors 2125 are disposed at the outer portion of the pixel unit 112. In an example, the temperature sensor 2125 may be disposed at each corner of the pixel unit 112, and provide the controller 2123 with temperature information corresponding to the temperature of each corner of the pixel unit 112. In an embodiment, the controller 2123 calculates the total temperature (e.g., average temperature) of the pixel unit 112 based on the temperature of each corner of the pixel unit 112.

[0146] However, the embodiments of the present disclosure are not limited thereto, and the temperature sensor 2125 may be disposed at various locations overlapping the pixel unit 112. Corresponding to the temperature information from the temperature sensor 2125, the controller 2123 may determine the total temperature of the pixel unit 112 or the temperature of each block.

[0147] Figure 7 is a diagram illustrating a controller according to an embodiment of the present disclosure. Figure 8 It is shown that the storage Figure 7 A diagram of the voltage information in the memory cell shown in FIG. Fig. 9 is shown with Figure 8 The voltage information shown in the figure corresponds to the voltage difference.

[0148] refer to Figures 7 to 9 , the controller 2123 may include a storage unit (storage device) 211. Voltage information of the second power voltage VSS and the reset voltage VRST corresponding to the temperature information of the pixel unit 112 may be stored in the storage unit 211.

[0149] In an embodiment, the second power voltage VSS may be set to a voltage value of the reference second power voltage RVSS at a reference temperature (e.g., 25° C.) Further, the second power voltage VSS may be set to have a voltage (e.g., VSS21, VSS22) that gradually increases compared to the reference second power voltage RVSS as the temperature increases from the reference temperature.

[0150] In an example, when the temperature of the pixel unit 112 is 35° C., the second power voltage VSS may be set to a voltage VSS21, and the voltage VSS21 is a voltage higher than the reference second power voltage RVSS. In an example, when the temperature of the pixel unit 112 is 45° C., the second power voltage VSS may be set to a voltage VSS22, and the voltage VSS22 is a voltage higher than the voltage VSS21.

[0151] In an embodiment, the second power voltage VSS may be set to have a voltage (e.g., VSS11, VSS12, VSS13, VSS14, VSS15, VSS16) that gradually decreases compared to the reference second power voltage RVSS as the temperature decreases from the reference temperature. In an example, when the temperature of the pixel unit 112 is 10°C, the second power voltage VSS may be set to a voltage VSS11, and the voltage VSS11 is a voltage lower than the reference second power voltage RVSS. Similarly, as the temperature of the pixel unit 112 decreases, the second power voltage VSS may gradually decrease to voltages VSS12, VSS13, VSS14, VSS15, and VSS16.

[0152] The second power voltage VSS may be preset to a voltage corresponding to a characteristic of the light emitting element LD corresponding to temperature. In an example, the second power voltage VSS may be preset so that a certain current or a current similar thereto may flow through the light emitting element LD regardless of temperature.

[0153] In an embodiment, the reset voltage VRST is set to a voltage value of a reference reset voltage RVRST at a reference temperature (eg, 25° C.) In an example, the reset voltage VRST may be set to voltages RVRST, VRST21, and VRST22 at the reference temperature or higher.

[0154] The reset voltage VRST may be set such that the voltage difference between the reset voltage VRST and the second power voltage VSS decreases as the temperature increases from the reference temperature. Fig. 9 As shown in , at the reference temperature, the voltage difference between the second power voltage VSS (or RVSS) and the reset voltage VRST (or RVRST) may be set to the second voltage V2. In addition, at a temperature higher than the reference temperature (e.g., 45°C), the voltage difference between the second power voltage VSS (or VSS22) and the reset voltage VRST (or VRST22) may be set to the first voltage V1. The first voltage V1 may be lower than the second voltage V2.

[0155] That is, in an embodiment of the present disclosure, when the temperature of the pixel unit 112 increases, the voltage difference between the reset voltage VRST and the second power voltage VSS may be set to be low (or small).

[0156] More specifically, when the temperature of the pixel unit 112 increases, the amount of current flowing through the light receiving element LRD may increase corresponding to the same conditions (e.g., the intensity of light or the exposure time). In an embodiment of the present disclosure, the voltage difference between the reset voltage VRST and the second power voltage VSS may be set to be low corresponding to the increase in the temperature of the pixel unit 112. That is, in an embodiment of the present disclosure, the voltage difference between the reset voltage VRST and the second power voltage VSS is controlled corresponding to the temperature of the pixel unit 112, so that the current change corresponding to the characteristic change of the light receiving element LRD can be compensated.

[0157] In an embodiment, the reset voltage VRST is set so that the voltage difference between the reset voltage VRST and the second power voltage VSS increases as the temperature decreases from the reference temperature. In an embodiment, the reset voltage VRST may be set to a voltage value of the reference reset voltage RVRST at a reference temperature (e.g., 25° C.). In an example, the reset voltage VRST may be set to voltages RVRST, VRST11, VRST12, VRST13, VRST14, VRST15, and VRST16 at the reference temperature or lower.

[0158] The reset voltage VRST may be set such that the voltage difference between the reset voltage VRST and the second power voltage VSS becomes higher (or larger) as the temperature decreases from the reference temperature. Fig. 9 As shown in , at the reference temperature, the voltage difference between the second power voltage VSS (or RVSS) and the reset voltage VRST (or RVRST) can be set to the second voltage V2. In addition, at a temperature lower than the reference temperature (e.g., -40°C), the voltage difference between the second power voltage VSS (or VSS16) and the reset voltage VRST (or VRST16) can be set to a third voltage V3. In an embodiment, the third voltage V3 is higher than the second voltage V2.

[0159] That is, in an embodiment of the present disclosure, when the temperature of the pixel unit 112 decreases, the voltage difference between the reset voltage VRST and the second power voltage VSS can be set to be high. More specifically, when the temperature of the pixel unit 112 decreases, the amount of current flowing through the light receiving element LRD can be reduced corresponding to the same conditions (for example, the intensity of light or the exposure time). In an embodiment of the present disclosure, corresponding to the decrease in the temperature of the pixel unit 112, the voltage difference between the reset voltage VRST and the second power voltage VSS can be set to be large. That is, in an embodiment of the present disclosure, the voltage difference between the reset voltage VRST and the second power voltage VSS changes based on the temperature of the pixel unit 112, so that the current change corresponding to the characteristic change of the light receiving element LRD can be compensated.

[0160] The operation process will be briefly described. When a predetermined image is displayed on the pixel unit 112, the temperature sensor 2125 can sense the temperature of the pixel unit 112 and provide temperature information based on the sensed temperature to the controller 2123. The controller 2123 can use the temperature information corresponding to the pixel unit 112 stored in the storage unit 211. Figure 8 , to extract voltage information corresponding to the temperature of the pixel unit 112. In an example, when the temperature of the pixel unit 112 is a reference temperature (eg, 25° C.), the controller 2123 may extract voltage information of the reference second power voltage RVSS and the reference reset voltage RVRST.

[0161] Thereafter, the controller 2123 may provide voltage information of the reference second power voltage RVSS and the reference reset voltage RVRST to the power supply 2124. Then, the power supply 2124 may generate the reference second power voltage RVSS as the second power voltage VSS and the reference reset voltage RVRST as the reset voltage VRST, and provide the reference second power voltage RVSS and the reference reset voltage RVRST to the pixel unit 112. That is, in the embodiment of the present disclosure, the reset voltage VRST is set by considering the temperature characteristics of the pixel unit 112, and therefore, the reliability of the operation of the optical sensor PHS may be ensured. Included in Figure 8 The temperature and voltage in the lookup table shown in are merely examples for describing the present disclosure, and various temperature information may be included in the actual lookup table.

[0162] Fig.10 It is shown that the storage Figure 7 A diagram of an implementation of a lookup table in a storage unit is shown in . Fig.11 It is shown Fig.10 The voltage of the reset signal is shown in FIG. Fig.10 In the Figure 8 Description of the partially overlapping parts shown in .

[0163] refer to Fig.10 , and the voltage of the reset signal RST corresponding to the temperature may also be stored. The voltage of the reset signal RST may mean a gate-on voltage (or a high-level voltage) that may turn on the second transistor M2.

[0164] In an embodiment, the voltage of the reset signal RST may be set to a reference reset signal voltage RRST at a reference temperature (e.g., 25° C.) Further, the voltage of the reset signal RST may be set to have a voltage (e.g., RST21, RST22) that gradually decreases compared to the reference reset signal voltage RRST as the temperature increases from the reference temperature.

[0165] In an example, when the temperature of the pixel unit 112 is 35° C., the voltage of the reset signal RST may be set to a voltage RST21, and the voltage RST21 may be set to a voltage lower than the reference reset signal voltage RRST. In an example, when the temperature of the pixel unit 112 is 45° C., the voltage of the reset signal RST may be set to a voltage RST22 lower than the voltage RST21.

[0166] In an embodiment, the voltage of the reset signal RST may be set to have a voltage (e.g., RST11, RST12, RST13, RST14, RST15, RST16) that gradually increases compared to the reference reset signal voltage RRST as the temperature decreases from the reference temperature. In an example, when the temperature of the pixel unit 112 is 10° C., the voltage of the reset signal RST may be set to a voltage RST11 that is higher than the reference reset signal voltage RRST. Similarly, as the temperature of the pixel unit 112 decreases, the voltage of the reset signal RST may gradually increase to voltages RST12, RST13, RST14, RST15, and RST16.

[0167] When the voltage of the reset signal RST decreases, the voltage of the second transistor M2 may be set to low. In addition, when the voltage of the reset signal RST increases, the voltage of the second transistor M2 may be set to high. In an example, in an embodiment of the present disclosure, when the temperature of the pixel unit 112 increases, the voltage of the second transistor M2 may be set to low, and thus, the amount of current flowing through the light receiving element LRD may be reduced. In an example, in an embodiment of the present disclosure, when the temperature of the pixel unit 112 decreases, the voltage of the second transistor M2 may be set to high, and thus, the amount of current flowing through the light receiving element LRD may be increased.

[0168] In the example, Fig.11As shown in , at a reference temperature, the voltage of the reset signal RST may be set to a second voltage V12. At a temperature higher than the reference temperature, the voltage of the reset signal RST may be set to a first voltage V11 lower than the second voltage V12. In addition, at a temperature lower than the reference temperature, the voltage of the reset signal RST may be set to a third voltage V13 higher than the second voltage V12.

[0169] The operation process will be briefly described. When a predetermined image is displayed on the pixel unit 112, the temperature sensor 2125 may sense the temperature of the pixel unit 112 and provide temperature information based on or including the sensed temperature to the controller 2123. The controller 2123 may use the temperature information corresponding to the pixel unit 112 stored in the storage unit 211. Fig.10 , to extract voltage information corresponding to the temperature of the pixel unit 112. In an example, when the temperature of the pixel unit 112 is a reference temperature (e.g., 25° C.), the controller 2123 may extract voltage information of the reference second power voltage RVSS, the reference reset voltage RVRST, and the reference reset signal voltage RRST.

[0170] Thereafter, the controller 2123 may provide voltage information of the reference second power voltage RVSS, the reference reset voltage RVRST, and the reference reset signal voltage RRST to the power supply 2124. Then, the power supply 2124 may generate the reference second power voltage RVSS as the second power voltage VSS, and generate the reference reset voltage RVRST as the reset voltage VRST, and provide the reference second power voltage RVSS and the reference reset voltage RVRST to the pixel unit 112. In addition, the power supply 2124 may provide the gate-on voltage VGON corresponding to the reference reset signal voltage RRST (e.g., the second voltage V12) to the reset circuit 2141. The reset circuit 2141 may provide the reset signal RST corresponding to the gate-on voltage VGON to the pixel unit 112.

[0171] Fig.12 is a diagram illustrating a pixel unit according to an embodiment of the present disclosure.

[0172] refer to Fig.12 In an embodiment of the present disclosure, the pixel unit 112 may include a plurality of blocks BL1, BL2, ..., BLp (p is a natural number of 3 or more). The plurality of blocks BL1 to BLp may be divided in units of horizontal lines. The plurality of blocks BL1 to BLp may include at least one optical sensor PHS.

[0173] The optical sensors PHS included in the corresponding blocks BL1 to BLp may be electrically connected to different reset control lines RSTL1, RSTL2, ..., RSTLp. In an example, the optical sensor PHS included in the first block BL1 may be electrically connected to the first reset control line RSTL1. In an example, the optical sensor PHS included in the second block BL2 may be electrically connected to the second reset control line RSTL2. In an example, the optical sensor PHS included in the p-th block BLp may be electrically connected to the p-th reset control line RSTLp.

[0174] A first reset signal RST1 may be provided from the first reset circuit 2141a to the first reset control line RSTL1. The first reset circuit 2141a may generate the first reset signal RST1 using the first gate-on voltage VGON1 provided from the power supply 2124, and provide the generated first reset signal RST1 to the first reset control line RSTL1. A voltage value of the first gate-on voltage VGON1 may be set based on the temperature of the first block BL1.

[0175] A second reset signal RST2 may be provided from the second reset circuit 2141b to the second reset control line RSTL2. The second reset circuit 2141b may generate the second reset signal RST2 using the second gate-on voltage VGON2 provided from the power supply 2124, and provide the generated second reset signal RST2 to the second reset control line RSTL2. The voltage value of the second gate-on voltage VGON2 may be set based on the temperature of the second block BL2.

[0176] A p-th reset signal RSTp may be provided from the p-th reset circuit 2141p to the p-th reset control line RSTLp. The p-th reset circuit 2141p may generate the p-th reset signal RSTp using the p-th gate-on voltage VGONp provided from the power supply 2124, and provide the generated p-th reset signal RSTp to the p-th reset control line RSTLp. The voltage value of the p-th gate-on voltage VGONp may be set to correspond to the temperature of the p-th block BLp.

[0177] In an embodiment, the controller 2123 determines the total temperature of the pixel unit 112 by using the temperatures of the corresponding blocks BL1 to BLp provided by the temperature sensor 2125, and uses Figure 8 or Fig.102124 can be used to extract the voltage values ​​of the second power voltage VSS and the reset voltage VRST corresponding to the temperature of the pixel unit 112 by using the lookup table shown in . Voltage information of the second power voltage VSS and the reset voltage VRST can be provided to the power supply 2124, and the power supply 2124 can generate the second power voltage VSS and the reset voltage VRST corresponding to the voltage information, and then provide the second power voltage VSS and the reset voltage VRST to the optical sensor PHS included in the pixel unit 112.

[0178] In an embodiment, the temperature of each of the blocks BL1 to BLp is provided to the controller 2123 from the temperature sensor 2125, and the controller 2123 uses Fig.10 The lookup table shown in extracts the voltage value of the reset signal RST corresponding to the temperature of each of the blocks BL1 to BLp. The voltage information of the reset signal RST for each of the blocks BL1 to BLp may be provided to the power supply 2124, and the power supply 2124 may provide the gate-on voltages VGON1 to VGONp corresponding to the voltage information of the reset signal RST to the reset circuits 2141a to 2141p, respectively.

[0179] That is, in the embodiment of the present disclosure, the voltage of the reset signal RST and the second power voltage VSS are controlled so that the temperature characteristics of the light receiving element LRD included in each of the optical sensors PHS can be compensated. In addition, the voltage of the reset signal RST can be controlled in units of blocks BL1 to BLp so that the temperature change corresponding to the position of the pixel unit 112 can be compensated (or the temperature characteristics of the light receiving element LRD can be compensated).

[0180] Fig.13 is a diagram illustrating an electronic device according to an embodiment of the present disclosure.

[0181] refer to Fig.13 , the electronic device 1000 according to an embodiment of the present disclosure may output various information through the display module 1140. When the processor 1110 executes an application stored in the memory 1120, the display module 1140 may provide application information to the user through the display panel 1141.

[0182] The processor 1110 may obtain external input through the input module 1130 or the sensor module 1161 and execute an application corresponding to the external input. For example, when a user selects a camera icon (or a camera application icon) displayed on the display panel 1141, the processor 1110 may obtain user input through the input sensor 1161-2 and activate the camera module 1171. The processor 1110 may transmit image data corresponding to a captured image obtained through the camera module 1171 to the display module 1140. The display module 1140 may display an image corresponding to the captured image through the display panel 1141.

[0183] In another example, when personal information authentication is performed in the display module 1140, the fingerprint sensor 1161-1 may acquire input fingerprint information as input data. The processor 1110 may compare the input data acquired by the fingerprint sensor 1161-1 with the authentication data stored in the memory 1120, and execute the application according to the comparison result. The display module 1140 may display information executed according to the logic of the application through the display panel 1141. The fingerprint sensor 1161-1 may be configured to acquire fingerprint information in the entire area of ​​the display panel 1141.

[0184] In yet another example, when a music streaming icon displayed on the display module 1140 is selected, the processor 1110 may obtain user input through the input sensor 1161-2 and activate a music streaming application stored in the memory 1120. When a music playback command is input in the music streaming application, the processor 1110 may activate the sound output module 1163 to provide the user with sound information that complies with the music playback command.

[0185] In the above, the operation of the electronic device 1000 has been briefly described. Hereinafter, the components of the electronic device 1000 will be described in detail. Some of the components of the electronic device 1000 to be described later may be integrated to be provided as one component, and one component may be separated into two or more components to be provided.

[0186] The electronic device 1000 can communicate with the external electronic device 2000 through a network (e.g., a short-range wireless communication network or a long-range wireless communication network). According to an embodiment, the electronic device 1000 may include a processor 1110, a memory 1120, an input module 1130, a display module 1140, a power module 1150, an internal module 1160, and an external module 1170. According to an embodiment, in the electronic device 1000, at least one of the above components may be omitted, or one or more other components may be added. According to an embodiment, some of the above components (e.g., a sensor module 1161, an antenna module 1162, and / or a sound output module 1163) may be integrated in another component (e.g., a display module 1140).

[0187] The processor 1110 can control at least one other component (e.g., hardware or software component) of the electronic device 1000 connected to the processor 1110 by executing software, and perform various processes or calculations. According to an embodiment, as at least part of data processing and calculation, the processor 1110 can store a command or data received from another component (e.g., the input module 1130, the sensor module 1161, or the communication module 1173) in the volatile memory 1121, process the command or data stored in the volatile memory 1121, and store the result data in the non-volatile memory 1122.

[0188] The processor 1110 may include a main processor 1111 and an auxiliary processor 1112. The main processor 1111 may include a central processing unit (CPU) 1111-1 (or Figure 1 The main processor 1111 may further include at least one of a graphics processing unit (GPU) 1111-2, a communication processor (CP), and an image signal processor (ISP). The main processor 1111 may further include a neural processing unit (NPU) 1111-3. NPU 1111-3 is a processor designated for processing an artificial intelligence (AI) model, and the AI ​​model may be generated by machine learning. The AI ​​model may include multiple artificial neural network layers. The artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q network, or one of two or more combinations thereof, but the present disclosure is not limited to the above examples. In addition to the hardware structure, the AI ​​model may also additionally or alternatively include a software structure. At least two of the above-mentioned processing unit and the above-mentioned processor may be implemented as an integrated component (e.g., a single chip), or as components independent of each other (e.g., multiple chips).

[0189] The auxiliary processor 1112 may include a controller 1112-1. The controller 1112-1 may include an interface conversion circuit and a timing control circuit. In an example, the controller 1112-1 may include Figure 3 Controller 1112-1 may receive an image signal from main processor 1111 and convert the data format of the image signal into an interface specification suitable for display module 1140, thereby outputting image data. Controller 1112-1 may output various control signals required to drive display module 1140.

[0190] The auxiliary processor 1112 may further include a data conversion circuit 1112-2, a gamma correction circuit 1112-3, a rendering circuit 1112-4, a touch control circuit 1112-5, etc. The data conversion circuit 1112-2 may receive image data from the controller 1112-1 and compensate the image data so that an image is displayed at a desired brightness according to the characteristics of the electronic device 1000 or the user's settings, or convert the image data for the purpose of reducing power consumption, image post-compensation, etc.

[0191] The gamma correction circuit 1112-3 may convert image data, gamma reference voltage, etc. so that an image displayed in the electronic device 1000 has a desired gamma characteristic. The rendering circuit 1112-4 may receive image data from the controller 1112-1 and render the image data by considering a pixel arrangement of a display panel 1141, etc., applied to the electronic device 1000.

[0192] The touch control circuit 1112-5 may provide a touch signal to the input sensor 1161-2, and may be provided with a sensing signal corresponding to the touch signal from the input sensor 1161-2. The touch control circuit 1112-5 may include Figure 1 The touch sensor driver 220 shown in FIG.

[0193] At least one of the data conversion circuit 1112-2, the gamma correction circuit 1112-3, the rendering circuit 1112-4, and the touch control circuit 1112-5 may be integrated in another component (e.g., the main processor 1111 or the controller 1112-1). At least one of the data conversion circuit 1112-2, the gamma correction circuit 1112-3, and the rendering circuit 1112-4 may be integrated into a source driver 1143 to be described later.

[0194] The memory 1120 may store various data used by at least one component of the electronic device 1000 (e.g., the processor 1110 or the sensor module 1161) and input or output data about commands associated therewith. In addition, various setting data corresponding to user settings may be stored in the memory 1120. The memory 1120 may include at least one of a volatile memory 1121 and a nonvolatile memory 1122.

[0195] The input module 1130 may receive commands or data to be used in components of the electronic device 1000 (eg, the processor 1110, the sensor module 1161, or the sound output module 1163) from outside the electronic device 1000 (eg, a user or an external electronic device 2000).

[0196] The input module 1130 may include a first input module 1131 for inputting commands or data from a user and a second input module 1132 for inputting commands or data from an external electronic device 2000. The first input module 1131 may include a microphone, a mouse, a keyboard, a key (e.g., a button) or a pen (e.g., a passive pen or an active pen). The second input module 1132 may support a specified protocol that enables the electronic device 1000 to communicate with the external electronic device 2000 in a wired or wireless manner. According to an embodiment, the second input module 1132 may include a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface. The second input module 1132 may include a connector that can physically connect the electronic device 1000 to the external electronic device 2000, such as an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0197] The display module 1140 can provide information to the user visually. The display module 1140 may include Figure 1 The display module 1140 may include a display panel 1141, a gate driver 1142, and a source driver 1143. The display module 1140 may also include a window, a chassis, and a bracket for protecting the display panel 1141. The display module 1140 may include Figure 1 The display device 1 shown in FIG.

[0198] The display panel 1141 (or display) may include a liquid crystal display panel, an organic light emitting display panel, or an inorganic light emitting display panel, and the type of the display panel 1141 is not particularly limited. The display panel 1141 may be a rigid type or a flexible type in which the display panel 1141 is rollable or foldable. The display module 1140 may further include a support, a bracket, a heat dissipation member, etc. for supporting the display panel 1141. The display panel 1141 may include Figure 1Panel 10 shown in .

[0199] The gate driver 1142 may be a driving chip and may be mounted in the display panel 1141. In addition, the gate driver 1142 may be integrated in the display panel 1141. For example, the gate driver 1142 may include an amorphous silicon TFT gate (ASG) driver circuit, a low temperature polysilicon (LTPS) TFT gate driver circuit, or an oxide semiconductor TFT gate (OSG) driver circuit embedded in the display panel 1141. The gate driver 1142 may receive a control signal from the controller 1112-1 and output a scan signal to the display panel 1141 in response to the control signal. The gate driver 1142 may include Figure 3 The scan driver 2121 and the sensing scan driver 2143 are shown in FIG.

[0200] The display module 1140 may further include an emission driver. The emission driver may output an emission control signal to the display panel 1141 in response to a control signal received from the controller 1112-1. The emission driver may be formed separately from the gate driver 1142 or integrated in the gate driver 1142.

[0201] The source driver 1143 may receive a control signal from the controller 1112-1, convert the image data into an analog voltage (eg, a data voltage), and then output the data voltage to the display panel 1141 in response to the control signal. The source driver 1143 may include Figure 3 The data driver 2122 shown in FIG.

[0202] The source driver 1143 may be integrated into another component (eg, the controller 1112-1). The functions of the interface conversion circuit and the timing control circuit of the controller 1112-1 may be integrated into the source driver 1143. In addition, the display module 1140 may also include Figure 3 The reset circuit 2141 and the readout circuit 2142 are shown in FIG.

[0203] The display module 1140 may further include a voltage generating circuit 1144. The voltage generating circuit 1144 may output various voltages for driving the display panel 1141. In an example, the voltage generating circuit 1144 may include Figure 3 Power supply 2124 shown in .

[0204] In an implementation, the display panel 1141 may include Figure 1 , and a plurality of pixels PX and a plurality of optical sensors PHS are shown.

[0205] In an embodiment, during one horizontal period, the source driver 1143 may convert data corresponding to red (R), green (G), and blue (B) included in image data received from the processor 1110 into a red data signal (or data voltage), a green data signal, and a blue data signal, and provide the red data signal, the green data signal, and the blue data signal to a plurality of pixel columns included in the display panel 1141.

[0206] The power module 1150 may provide power to at least one component of the electronic device 1000. The power module 1150 may include a battery for charging a power voltage. The battery may include a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. The power module 1150 may include a power management integrated circuit (PMIC). The PMIC may provide an optimized power supply to each of the above modules and modules to be described later. The power module 1150 may include a wireless power transmission / reception member electrically connected to the battery. The wireless power transmission / reception member may include a plurality of coil-shaped antenna radiators.

[0207] The electronic device 1000 may further include an internal module 1160 and an external module 1170. The internal module 1160 may include a sensor module 1161, an antenna module 1162, and a sound output module 1163. The external module 1170 may include a camera module 1171, an optical module 1172, and a communication module 1173.

[0208] The sensor module 1161 may sense an input caused by a user's body or an input caused by a pen in the first input module 1131 and generate an electrical signal or data value corresponding to the input. The sensor module 1161 may include at least one of a fingerprint sensor 1161-1, an input sensor 1161-2, and a digitizer 1161-3.

[0209] The fingerprint sensor 1161-1 may generate a data value corresponding to the user's fingerprint. The fingerprint sensor 1161-1 may include Figure 1 The optical sensor PHS shown in FIG.

[0210] The input sensor 1161-2 may generate a data value corresponding to the coordinate information of the input caused by the user's body or the input caused by the pen. The input sensor 1161-2 may generate a capacitance change caused by the input as a data value. The input sensor 1161-2 may sense the input caused by the passive pen, or send / receive data to / from the active pen. The input sensor 1161-2 may include Figure 1 The sensor SC shown in .

[0211] The input sensor 1161-2 may measure a biometric signal such as pressure, humidity, or body fat. For example, when the user does not move for a constant time while a body part of the user is in contact with the sensor layer or sensing panel, the input sensor 1161-2 may output information desired by the user to the display module 1140 by sensing the biometric signal based on a change in an electric field caused by the body part.

[0212] The digitizer 1161-3 may generate a data value corresponding to the coordinate information of the input caused by the pen. The digitizer 1161-3 may generate an electromagnetic change caused by the input as a data value. The digitizer 1161-3 may sense the input caused by the passive pen, or send / receive data to / from the active pen.

[0213] At least one of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 may be implemented as a sensor layer formed on the display panel 1141 through a continuous process. At least one of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 may be disposed at an upper side of the display panel 1141, and any one of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 (e.g., the digitizer 1161-3) may be disposed at a lower side of the display panel 1141.

[0214] At least two of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 may be formed to be integrated into one sensing panel through the same process. When at least two of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 are integrated into one sensing panel, the sensing panel may be disposed between the display panel 1141 and a window disposed at an upper side of the display panel 1141. According to an embodiment, the sensing panel may be disposed on the window, but the position of the sensing panel is not particularly limited.

[0215] At least one of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 may be built in the display panel 1141. That is, at least one of the fingerprint sensor 1161-1, the input sensor 1161-2, and the digitizer 1161-3 may be simultaneously formed by a process of forming an element (e.g., a light emitting element, a transistor, etc.) included in the display panel 1141.

[0216] In addition, the sensor module 1161 may generate an electrical signal or a data value corresponding to an internal state or an external state of the electronic device 1000. The sensor module 1161 may also include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illumination sensor.

[0217] The antenna module 1162 may include one or more antennas for transmitting signals or power to the outside or receiving signals or power from the outside. According to an embodiment, the communication module 1173 may transmit signals to the external electronic device 2000 or receive signals from the external electronic device 2000 through an antenna suitable for the communication scheme. The antenna pattern of the antenna module 1162 may be integrated in a component of the display module 1140 (e.g., the display panel 1141), the input sensor 1161-2, etc.

[0218] The sound output module 1163 is a device for outputting a sound signal to the outside of the electronic device 1000, and includes, for example, a speaker for general purposes such as multimedia playback or transcription playback and a receiver only for call reception. According to the embodiment, the receiver may be formed integrally with the speaker, or separately from the speaker. The sound output pattern of the sound output module 1163 may be integrated in the display module 1140.

[0219] The camera module 1171 can capture still images and moving images. Depending on the implementation, the camera module 1171 may include one or more lenses, image sensors, or image signal processors. The camera module 1171 may also include an infrared camera capable of measuring the presence of a user, the position of a user, the eyes of a user, etc.

[0220] The light module 1172 may provide light. The light module 1172 may include a light emitting diode or a xenon lamp. The light module 1172 may operate in association with the camera module 1171 or independently of the camera module 1171.

[0221] The communication module 1173 can establish a wired or wireless communication channel between the electronic device 1000 and the external electronic device 2000, and support communication performance through the established communication channel. The communication module 1173 may include any one or all of a wireless communication module such as a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module and a wired communication module such as a local area network (LAN) communication module or a power line communication (PLC) module. The communication module 1173 can be connected to the external electronic device 2000 through a wireless communication module such as a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module. A short-range communication network such as Wireless Fidelity (WiFi) Direct or Infrared Data Association (IrDA) or a long-range communication network such as a cellular network, the Internet, or a computer network (e.g., a LAN or a Wide Area Network (WAN)) communicates with the external electronic device 2000. The above-mentioned several communication modules may be implemented as one chip, or may be implemented as separate chips respectively.

[0222] The input module 1130 , the sensor module 1161 , and the camera module 1171 may be used to control the operation of the display module 1140 in association with the processor 1110 .

[0223] The processor 1110 may output a command or data to the display module 1140, the sound output module 1163, the camera module 1171, or the optical module 1172 based on the input data received from the input module 1130. For example, the processor 1110 may generate image data corresponding to the input data applied by a mouse, an active pen, etc., and output the image data to the display module 1140. Alternatively, the processor 1110 may generate command data corresponding to the input data, and output the command data to the camera module 1171 or the optical module 1172. When no input data is received from the input module 1130, the processor 1110 may change the operation mode of the electronic device 1000 to a low power mode or a sleep mode, thereby reducing the power consumed in the electronic device 1000.

[0224] The processor 1110 may output a command or data to the display module 1140, the sound output module 1163, the camera module 1171, or the optical module 1172 based on the sensing data received from the sensor module 1161. For example, the processor 1110 may compare the authentication data applied by the fingerprint sensor 1161-1 with the authentication data stored in the memory 1120 to generate a comparison result, and then execute an application according to the comparison result. The processor 1110 may execute a command or output corresponding image data to the display module 1140 based on the sensing data sensed by the input sensor 1161-2 or the digitizer 1161-3. When a temperature sensor is included in the sensor module 1161, the processor 1110 may receive temperature data about the temperature measured from the sensor module 1161, and further perform brightness correction on the image data based on the temperature data.

[0225] The processor 1110 may receive measurement data regarding the user's presence, the user's position, or the user's eyes from the camera module 1171. The processor 1110 may also perform brightness correction on the image data based on the measurement data. For example, the processor 1110 that determines the user's presence or presence through the input from the camera module 1171 may output brightness-corrected image data to the display module 1140 through the data conversion circuit 1112-2 or the gamma correction circuit 1112-3.

[0226] At least some of the above components may be connected to each other, and signals (e.g., commands or data) may be transmitted between them through an inter-peripheral communication scheme such as a bus, a general purpose input / output (GPIO), a serial peripheral interface (SPI), a mobile industrial processor interface (MIPI), or an ultra-path interconnect (UPI) link. The processor 1110 may communicate with the display module 1140 through a specified interface and use any of the above communication schemes. However, the present disclosure is not limited to the above communication schemes.

[0227] In the display device and the method of driving the display device and the electronic device including the display device according to the present disclosure, the voltage supplied to the optical sensor can be changed based on the temperature, and thus, the temperature characteristic of the light receiving element included in each of the optical sensors can be compensated.

[0228] Exemplary embodiments have been disclosed herein, and although specific terms are used, they are used and will be interpreted only in a general and descriptive sense and not for purposes of limitation. In some cases, as will be apparent to one of ordinary skill in the art at the time of filing this application, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise specifically noted. Therefore, it will be understood by those skilled in the art that various changes may be made in form and detail without departing from the spirit and scope of the present disclosure as set forth in the appended claims.

Claims

1. A display device, comprising: A display panel including pixels and optical sensors, each of the pixels including a light emitting element located between a first power line receiving a first power voltage and a second power line receiving a second power voltage, each of the optical sensors including a light receiving element located between a third power line receiving a reset voltage and the second power line; at least one temperature sensor configured to sense a temperature of the display panel; a power supply configured to provide the first power voltage, the second power voltage, and the reset voltage; as well as a controller, connected to the temperature sensor and the power supply, The controller controls the power supply so that a voltage value of the reset voltage changes based on the temperature of the display panel.

2. The display device according to claim 1, wherein: The power supply changes the reset voltage so that a voltage difference between the reset voltage and the second power voltage decreases when the temperature of the display panel increases.

3. The display device according to claim 2, wherein: When the temperature of the display panel increases, the power supply increases a voltage value of the second power voltage.

4. The display device according to claim 1, wherein: The power supply changes the reset voltage so that a voltage difference between the reset voltage and the second power voltage increases when the temperature of the display panel decreases.

5. The display device according to claim 4, wherein: When the temperature of the display panel decreases, the power supply decreases a voltage value of the second power voltage.

6. The display device according to claim 1, wherein: The controller includes a storage device configured to store a lookup table including voltage values ​​of the second power voltage and the reset voltage corresponding to a plurality of temperature values.

7. The display device according to claim 1, wherein: Each of the optical sensors comprises: a second transistor connected between the third power line and the first node, the second transistor including a gate electrode connected to a reset control line; The light receiving element is connected between the first node and the second power line; a first transistor including a first electrode connected to a fourth power line receiving a common voltage and a gate electrode connected to the first node; and A third transistor is connected between the second electrode of the first transistor and the readout line, and includes a gate electrode connected to the sensing scan line.

8. The display device according to claim 7, further comprising: a reset circuit configured to generate a reset signal supplied to the reset control line using a gate-on voltage supplied from the power supply; a sensing scan driver configured to provide a sensing scan signal to the sensing scan line; as well as The readout circuit is configured to receive a sensing signal from the readout line.

9. The display device according to claim 8, wherein: The controller controls the power supply so that a voltage value of the gate-on voltage is changed based on the temperature of the display panel.

10. The display device according to claim 9, wherein: The power supply decreases the voltage value of the gate-on voltage when the temperature of the display panel increases, and increases the voltage value of the gate-on voltage when the temperature of the display panel decreases.

11. The display device according to claim 10, wherein: The controller includes a storage device configured to store a lookup table including voltage values ​​of the second power voltage, the reset voltage, and the gate-on voltage corresponding to a plurality of temperature values.

12. The display device according to claim 8, wherein: The display panel is divided into at least two blocks, and the optical sensors located in the blocks different from each other are connected to different reset control lines.

13. The display device according to claim 12, wherein: The optical sensor included in a first block among the at least two blocks is connected to a first reset control line, and the optical sensor included in a second block different from the first block among the at least two blocks is connected to a second reset control line, and The first reset control line is provided with a first reset signal from a first reset circuit, and the second reset control line is provided with a second reset signal from a second reset circuit.

14. The display device according to claim 13, wherein: The power supply provides a first gate-on voltage to the first reset circuit based on a temperature of the first block, and provides a second gate-on voltage to the second reset circuit based on a temperature of the second block.

15. A method of driving a display device including optical sensors each having a light receiving element located between a first power line receiving a reset voltage and a second power line receiving a second power voltage, the method comprising: sensing a temperature of a display panel including the optical sensor; as well as Voltage values ​​of the reset voltage and the second power voltage supplied to the optical sensor are changed based on the temperature of the display panel.

16. The method according to claim 15, wherein: While changing the voltage values ​​of the reset voltage and the second power voltage, controlling the reset voltage and the second power voltage: so that when the temperature of the display panel increases, the voltage difference between the reset voltage and the second power voltage decreases; and Such that when the temperature of the display panel decreases, the voltage difference between the reset voltage and the second power voltage increases.

17. The method according to claim 15, wherein: Each of the optical sensors includes an N-type transistor connected between the first power line and the light receiving element, the N-type transistor being turned on by a reset signal, and Wherein, a voltage value of the reset signal changes based on the temperature of the display panel.

18. The method according to claim 17, wherein: When the temperature of the display panel increases, the voltage value of the reset signal decreases, and when the temperature of the display panel decreases, the voltage value of the reset signal increases.

19. The method according to claim 17, wherein: The display panel is divided into a plurality of blocks, and a voltage of the reset signal provided to each of the plurality of blocks is changed based on the temperature of the display panel.

20. An electronic device comprising: Display panel, including pixels and optical sensors; a voltage generating circuit configured to supply a first power voltage and a second power voltage to the pixel, and supply a reset voltage and the second power voltage to the optical sensor; a temperature sensor configured to sense a temperature of the display panel; as well as a controller configured to control the voltage generating circuit based on the temperature of the display panel sensed by the temperature sensor, The controller controls the voltage generating circuit so that voltage values ​​of the reset voltage and the second power voltage change based on the temperature of the display panel.

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