Display device

Abstract

A display device includes: a display panel including pixels that receive a driving voltage via a driving voltage line; a panel driver for driving the display panel; a voltage generator for generating the driving voltage, and the voltage generator determining the voltage level of the driving voltage based on a voltage control signal; a drive controller for controlling the driving of the panel driver, and the drive controller supplying the voltage control signal to the voltage generator; and a voltage detector between the voltage generator and the driving voltage line, and the voltage detector sensing a sense voltage corresponding to a current flowing into the driving voltage line, and the voltage detector outputting a sense signal based on the sense voltage. The drive controller receives the sense signal from the voltage detector and generates the voltage control signal based on the sense signal.

Description

Technical Field

[0001] An aspect of the embodiments of this disclosure relates to a display device capable of reducing power consumption. Background Technology

[0002] Among various display devices, light-emitting display devices display images by using light-emitting diodes (LEDs) that generate light through the recombination of electrons and holes. Light-emitting display devices can be driven with low power consumption while providing fast response times.

[0003] A light-emitting display device includes a display panel in which pixels connected to data lines and scan lines are disposed. Each pixel typically includes a light-emitting diode (LED) and a pixel circuit unit (e.g., a pixel circuit) for controlling the amount of current flowing through the LED. The pixel circuit unit controls the amount of current flowing through the LED in response to a data signal. In this case, the LED generates light with a desired brightness (e.g., a predetermined brightness) corresponding to the amount of current flowing through the LED.

[0004] The information disclosed in this background section is intended to enhance the understanding of the background technology of this disclosure, and therefore, the information may include information that does not constitute prior art. Utility Model Content

[0005] Embodiments of this disclosure may relate to display devices capable of reducing power consumption.

[0006] According to one or more embodiments of this disclosure, a display device includes: a display panel including pixels configured to receive a driving voltage via a driving voltage line; a panel driver configured to drive the display panel; a voltage generator configured to generate a driving voltage, and the voltage generator determining a voltage level of the driving voltage based on a voltage control signal; a drive controller configured to drive the panel driver, and the drive controller supplying the voltage control signal to the voltage generator; and a voltage detector located between the voltage generator and the driving voltage line, and the voltage detector configured to sense a sense voltage corresponding to a current flowing into the driving voltage line, and the voltage detector outputting a sense signal based on the sense voltage. The drive controller is configured to: receive the sense signal from the voltage detector; and generate the voltage control signal based on the sense signal.

[0007] In one embodiment, the drive controller may include: a comparator configured to select a reference drive voltage corresponding to a sensed signal from a lookup table, the lookup table being configured to store a plurality of reference drive voltages corresponding to a plurality of reference signals respectively; and a controller configured to adjust a voltage control signal to control the drive voltage to have a voltage level corresponding to the reference drive voltage.

[0008] In an embodiment, the voltage detector may include: a detection circuit including a sensing resistor connected between a voltage generator and a drive voltage line; an amplifier circuit connected to a first end and a second end of the sensing resistor, and configured to output an output voltage by amplifying a sensed voltage sensed via the first end; a gain control circuit configured to control the gain of the amplifier circuit; and a conversion circuit configured to receive the output voltage from the amplifier circuit and convert the output voltage into a sense signal.

[0009] In an embodiment, the amplification circuit may include: an operational amplifier, including a first terminal connected to a first end, a second terminal connected to a second end, and an output terminal; and a transistor, including an input electrode connected to the first end, a control electrode connected to the output terminal of the operational amplifier, and an output electrode connected to the output terminal of the amplification circuit.

[0010] In one embodiment, the gain control circuit may include a gain adjustment resistor connected between the output terminal of the amplifier circuit and a ground terminal configured to receive ground voltage.

[0011] In an embodiment, the gain control circuit may be configured to: receive a gain control signal from the drive controller; and control the gain of the amplifier circuit in response to the gain control signal.

[0012] In one embodiment, the conversion circuit may include: an analog-to-digital converter configured to convert an output voltage into a sense signal as a digital signal, and a comparator configured to receive the sense signal from the conversion circuit.

[0013] In one embodiment, the controller may be configured to adjust the duty cycle of a voltage control signal, which is a square wave signal, to control the drive voltage to have a voltage level corresponding to a reference drive voltage.

[0014] In an embodiment, the driving voltage line may include a first driving voltage line and a second driving voltage line, and the pixel may include: a driving transistor connected to the first driving voltage line configured to receive a first driving voltage; and a light-emitting element connected between the driving transistor and the second driving voltage line configured to receive a second driving voltage.

[0015] In one embodiment, a voltage detector may be connected between a voltage generator and a second drive voltage line included in the drive voltage line.

[0016] According to one or more embodiments of the present disclosure, a display device includes: a display panel including pixels configured to receive a driving voltage via a driving voltage line; a panel driver configured to drive the display panel; a voltage generator configured to generate a driving voltage, and the voltage generator determining a voltage level of the driving voltage based on a voltage control signal; a drive controller configured to drive the panel driver; and a voltage controller located between the voltage generator and the driving voltage line, and the voltage controller configured to sense a sense voltage corresponding to a current flowing into the driving voltage line, and the voltage controller generating a voltage control signal based on the sense voltage.

[0017] In an embodiment, the voltage controller may include: a detection circuit including a sensing resistor connected between a voltage generator and a drive voltage line; an amplification circuit connected to a first end and a second end of the sensing resistor, and configured to amplify a sensed voltage sensed via the first end into an amplified sensed voltage; a gain control circuit configured to control the gain of the amplification circuit; a conversion circuit configured to convert the amplified sensed voltage into a sense signal; and a controller configured to: receive the sensed signal; select a reference drive voltage corresponding to the sensed signal from a lookup table configured to store a plurality of reference drive voltages corresponding to a plurality of reference signals respectively; and adjust a voltage control signal to control the drive voltage to have a voltage level corresponding to the reference drive voltage.

[0018] In this embodiment, the conversion circuit and the controller can be embedded together in the voltage control chip.

[0019] In an embodiment, the amplification circuit may include: an operational amplifier, including a first input terminal connected to a first end, a second input terminal connected to a second end, and an output terminal; and a transistor, including an input electrode connected to the first end, a control electrode connected to the output terminal of the operational amplifier, and an output electrode connected to the output terminal of the amplification circuit.

[0020] In one embodiment, the gain control circuit may include a resistor connected between the output terminal of the amplifier circuit and a ground terminal configured to receive ground voltage.

[0021] In an embodiment, the gain control circuit may be configured to: receive a gain control signal from the drive controller; and control the gain of the amplifier circuit in response to the gain control signal.

[0022] In one embodiment, the conversion circuit may include an analog-to-digital converter configured to convert the amplified sensing voltage into a sensing signal as a digital signal, and a controller configured to receive the sensing signal from the conversion circuit.

[0023] In an embodiment, the voltage control signal may be a square wave signal, and the controller may be configured to adjust the duty cycle of the voltage control signal to control the drive voltage to have a voltage level corresponding to the reference drive voltage.

[0024] In an embodiment, the driving voltage line may include a first driving voltage line and a second driving voltage line. A pixel may include: a driving transistor connected to the first driving voltage line configured to receive a first driving voltage; and a light-emitting element connected between the driving transistor and the second driving voltage line configured to receive a second driving voltage. The driving voltage may be one of the first driving voltage and the second driving voltage, and a voltage controller may be connected between the voltage generator and the second driving voltage line.

[0025] According to one or more embodiments of this disclosure, an electronic device includes: a display panel including pixels configured to receive a driving voltage via a driving voltage line; a panel driver configured to drive the display panel; a voltage generator configured to generate a driving voltage, and the voltage generator determining a voltage level of the driving voltage based on a voltage control signal; a drive controller configured to drive the panel driver, and the drive controller supplying the voltage control signal to the voltage generator; a voltage detector located between the voltage generator and the driving voltage line, and the voltage detector configured to sense a sense voltage corresponding to a current flowing into the driving voltage line, and the voltage detector outputting a sense signal based on the sense voltage; and a main processor configured to provide an image signal to the drive controller. The drive controller is configured to: receive the sense signal from the voltage detector; and generate the voltage control signal based on the sense signal.

[0026] However, this disclosure is not limited to the foregoing aspects and features, and the foregoing and additional aspects and features will be set forth in part in the following detailed description with reference to the accompanying drawings, and may also be apparent in part from the following detailed description with reference to the accompanying drawings, or may be learned by practicing one or more of the embodiments presented in this disclosure. Attached Figure Description

[0027] The above and other aspects and features of this disclosure will be more clearly understood from the following detailed description of exemplary, non-limiting embodiments with reference to the accompanying drawings.

[0028] Figure 1 This is a perspective view of a display device according to an embodiment of the present disclosure.

[0029] Figure 2 This is an exploded perspective view of a display device according to an embodiment of the present disclosure.

[0030] Figure 3 This is a block diagram of a display device according to an embodiment of the present disclosure.

[0031] Figure 4A This is an equivalent circuit diagram of a pixel according to an embodiment of the present disclosure.

[0032] Figure 4B It is a diagram. Figure 4A The waveform diagram shown illustrates the operation of the pixel during the sensing cycle.

[0033] Figure 5A This is a block diagram illustrating a voltage detector according to an embodiment of the present disclosure.

[0034] Figure 5B This is a block diagram of a drive controller according to an embodiment of the present disclosure.

[0035] Figure 6A and Figure 6B This is a graph illustrating the power consumption reduction based on brightness and occupancy rate implemented by a voltage detector according to some embodiments of the present disclosure.

[0036] Figure 7 This is a block diagram illustrating a voltage detector according to an embodiment of the present disclosure.

[0037] Figure 8 This is a block diagram of a display device according to an embodiment of the present disclosure.

[0038] Figure 9 This is a block diagram illustrating a voltage controller according to an embodiment of the present disclosure.

[0039] Figure 10 This is a block diagram illustrating a voltage controller according to an embodiment of the present disclosure.

[0040] Figure 11 This is a plan view of a display device according to an embodiment of the present disclosure.

[0041] Figure 12 This is a block diagram of an electronic device according to an embodiment of the present disclosure. Detailed Implementation

[0042] In the following description, embodiments will be illustrated in more detail with reference to the accompanying drawings, in which the same reference numerals refer to the same elements throughout. However, this disclosure may be implemented in a variety of different forms and should not be construed as being limited to the embodiments shown herein. Rather, these embodiments are provided as examples so that this disclosure will be thorough and complete, and will fully convey to those skilled in the art the aspects and features of this disclosure. Therefore, processes, elements, and techniques that are not essential for a person of ordinary skill in the art to a full understanding of the aspects and features of this disclosure may not be described. Unless otherwise stated, the same reference numerals refer to the same elements throughout the drawings and written description, and therefore, redundant descriptions may not be repeated.

[0043] When a particular embodiment can be implemented differently, the specific process sequence may differ from the described sequence. For example, two consecutively described processes may be executed simultaneously or substantially simultaneously, or they may be executed in the reverse order of the described sequence.

[0044] Furthermore, as will be understood by those skilled in the art, in view of the overall content of this disclosure, unless otherwise stated or implied, each suitable feature of the various embodiments of this disclosure may be combined in part or in whole, or combined with each other, and may be technically interlocked and operated in a variety of suitable ways, and each embodiment may be implemented independently of each other or in combination with each other in any suitable way.

[0045] In the accompanying drawings, for clarity, the relative dimensions, thicknesses, and proportions of elements, layers, and regions may be exaggerated and / or simplified. For ease of illustration, spatial relative terms such as “below,” “under,” “below,” “below,” “above,” and “above” may be used herein to describe the relationship of one element or feature illustrated in the figures to another element (or multiple elements) or feature (or multiple features). It will be understood that, in addition to the orientation depicted in the figures, spatial relative terms are also intended to cover different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “below” or “below” or “below” other elements or features will subsequently be oriented “above” other elements or features. Thus, the example terms “below” or “below” can cover both above and below orientations. The device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relative descriptive terms used herein shall be interpreted accordingly.

[0046] Furthermore, it should be anticipated that the shapes shown in the figures may change in practice, for example, depending on tolerances and / or manufacturing techniques. Therefore, the embodiments of this disclosure should not be construed as limited to the specific shapes shown in the figures, and should be interpreted in light of variations in shape, for example, that may occur due to manufacturing processes. Thus, the shapes shown in the figures may not describe the actual shape of areas of the device, and this disclosure is not limited thereto.

[0047] In the diagram, the x-axis, y-axis, and z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis can be perpendicular or substantially perpendicular to each other, or they can represent different directions that are not perpendicular to each other.

[0048] It will be understood that although the terms “first,” “second,” “third,” etc., may be used herein to describe various elements, components, areas, layers, and / or parts, these elements, components, areas, layers, and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, area, layer, or part from another element, component, area, layer, or part. Therefore, without departing from the spirit and scope of this document, the first element, component, area, layer, or part described below may be referred to as the second element, component, area, layer, or part.

[0049] It will be understood that when an element or layer is referred to as being "on," "connected to," or "coupled to" another element or layer, the element or layer may be directly on, directly connected to, or directly coupled to the other element or layer, or one or more intermediary elements or layers may exist. Similarly, when a layer, region, or element is referred to as being "electrically connected to" another layer, region, or element, the layer, region, or element may be directly electrically connected to the other layer, region, or element, and / or may be indirectly electrically connected to the other layer, region, or element, with one or more intermediary layers, regions, or elements between the layer, region, or element and the other layer, region, or element. Furthermore, it will be understood that when an element or layer is referred to as being "between" two elements or layers, the element or layer may be the only element or layer between the two elements or layers, or one or more intermediary elements or layers may exist.

[0050] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “an” are also intended to include the plural forms. It will also be understood that when the terms “comprising,” “including,” and “having” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. For example, the expression “A and / or B” means A, B, or A and B. When a statement such as “at least one of…” follows a list of elements, it modifies the entire list of elements and does not modify individual elements in that list. For example, the expressions “at least one of a, b and c” and “at least one selected from the group consisting of a, b and c” mean only a, only b, only c, both a and b, both a and c, both b and c, all a, b and c, or their variations.

[0051] As used herein, the terms “substantially,” “approximately,” and similar terms are used as approximate terms rather than terms of degree and are intended to account for inherent biases in measurements or calculations that would be recognized by one of ordinary skill in the art. Furthermore, when describing embodiments of this disclosure, the use of “may” means “one or more embodiments of this disclosure.” As used herein, the term “use” may be considered synonymous with the term “utilize.”

[0052] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It will also be understood that, unless so explicitly defined herein, terms (such as those defined in a general dictionary) shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and / or in this specification, and shall not be interpreted in an idealized or overly formalized sense.

[0053] Figure 1 This is a perspective view of a display device according to an embodiment of the present disclosure. Figure 2 This is an exploded perspective view of a display device according to an embodiment of the present disclosure.

[0054] refer to Figure 1 and Figure 2 The display device DD can be a device activated by an electrical signal. According to some embodiments of this disclosure, the display device DD can be a small or medium-sized electronic device, such as a mobile phone, a tablet PC, a laptop computer, a vehicle navigation system, or a game console. In some embodiments, the display device DD can be a large electronic device, such as a television or a monitor. However, this disclosure is not limited thereto, and the display device DD can be implemented as another suitable type of electronic device including a display or display device. The display device DD has a rectangular shape, which includes a long side extending in a first direction DR1 and a short side extending in a second direction DR2 intersecting or crossing the first direction DR1. However, the shape of the display device DD is not limited thereto. For example, the display device DD can be implemented in various suitable shapes. The display device DD can display an image IM in a display surface IS parallel to or substantially parallel to each of the first direction DR1 and the second direction DR2, facing a third direction DR3. The display surface IS displaying the image IM can correspond to the front surface of the display device DD.

[0055] In an embodiment, the front surface (e.g., upper surface / top surface) and rear surface (e.g., lower surface / bottom surface) of each component may be defined based on the orientation (e.g., third-party direction DR3) in which the image IM is displayed. The front surface may be opposite the rear surface on the third-party direction DR3, and the normal direction of each of the front and rear surfaces may be parallel to or substantially parallel to the third-party direction DR3.

[0056] The separation distance between the front and rear surfaces in the third direction DR3 can correspond to the thickness of the display device DD in the third direction DR3. However, the directions indicated in the figure for the first direction DR1, the second direction DR2, and the third direction DR3 can be relative concepts and can be modified to different relative directions in various ways as needed or desired.

[0057] The display device DD can sense external input applied from the outside. External input can include various suitable types of input provided from outside the display device DD. According to embodiments of this disclosure, the display device DD can sense external input from a user applied from the outside. The user's external input can be one of various suitable types of external input (such as a part of his / her body, his / her gaze, light, heat, pressure, or a suitable combination thereof). Furthermore, the display device DD can sense external input from a user applied to the side or rear surface of the display device DD according to the desired structure of the display device DD, and is not particularly limited thereto. As an example, external input can include input applied via an input device (e.g., a stylus, an active pen, a stylus, an electronic pen, or an electronic pen-like pen).

[0058] The display surface IS of the display device DD can be divided into a display area DA and a non-display area NDA. The display area DA can be the area in which an image IM is displayed. The user perceives (e.g., views) the image IM through the display area DA. In an embodiment, the display area DA is illustrated as a quadrilateral with rounded vertices. However, this disclosure is not limited thereto. The display area DA can have various suitable shapes and is not particularly limited.

[0059] The non-display area NDA is adjacent to the display area DA. The non-display area NDA may have a desired color (e.g., a given or predetermined color). The non-display area NDA may surround the display area DA (e.g., around the periphery of the display area DA). Therefore, the shape of the display area DA may be substantially defined by the non-display area NDA. However, this disclosure is not limited thereto. The non-display area NDA may be located adjacent to one side of the display area DA (e.g., only one side), or may be omitted as needed or desired. Various modifications can be made to the display device DD according to this disclosure as needed or desired, and are not particularly limited thereto.

[0060] refer to Figure 2 Also refer to Figure 1 The display device DD may include a display module (e.g., a monitor or touch display) DM and a window WM disposed on the display module DM. The display module DM may include a display panel DP and an input sensing layer ISP.

[0061] According to embodiments of this disclosure, the display panel DP may include a light-emitting display panel. For example, the display panel DP may be an organic light-emitting display panel, an inorganic light-emitting display panel, or a quantum dot light-emitting display panel. The light-emitting layer of an organic light-emitting display panel may include organic light-emitting materials. The light-emitting layer of an inorganic light-emitting display panel may include inorganic light-emitting materials. The light-emitting layer of a quantum dot light-emitting display panel may include quantum dots or quantum rods, etc.

[0062] The display panel DP can output an image IM, and therefore, the image IM can be displayed via the display surface IS.

[0063] An input sensing layer (ISP) can be disposed on a display panel (DP) to sense external input. The input sensing layer (ISP) can be directly disposed on the display panel (DP). According to embodiments of this disclosure, the input sensing layer (ISP) can be formed on the display panel (DP) through subsequent processes. In other words, when the input sensing layer (ISP) is directly disposed on the display panel (DP), the internal adhesive film may not be disposed between the input sensing layer (ISP) and the display panel (DP). However, this disclosure is not limited to this, and the internal adhesive film may be disposed between the input sensing layer (ISP) and the display panel (DP). In this case, the input sensing layer (ISP) may not be manufactured through a process continuous with the process of the display panel (DP). In other words, the input sensing layer (ISP) can be manufactured through a process separate from the process of the display panel (DP), and then fixed to the upper surface of the display panel (DP) by the internal adhesive film.

[0064] A window WM can be formed from a transparent material capable of outputting an image (IM). For example, a window WM can be made of glass, sapphire, or plastic. Although Figure 2 The illustrated window WM is implemented using a single layer, but this disclosure is not limited thereto. For example, the window WM may include multiple layers.

[0065] In some embodiments, the non-display area NDA of the display device DD may correspond to an area defined by printing a material comprising a desired color onto an area of ​​the window WM. As an example, the window WM may include a light-blocking pattern for defining the non-display area NDA. For example, the light-blocking pattern, which may be a colored organic film, may be formed by means such as coating.

[0066] The window WM can be coupled to the display module DM via an adhesive film. For example, the adhesive film may include an optically clear adhesive (OCA). However, the adhesive film is not limited to this. For example, the adhesive film may include any suitable adhesive or adhesive. For example, the adhesive film may include an optically clear resin (OCR) or a pressure-sensitive adhesive (PSA).

[0067] An anti-reflective layer may also be disposed between the window WM and the display module DM. The anti-reflective layer reduces the reflectivity of external light incident from above the window WM. According to embodiments of this disclosure, the anti-reflective layer may include a phase retarder and a polarizer. The phase retarder may be of film type or liquid crystal coating type, and may include a λ / 2 phase retarder and / or a λ / 4 phase retarder. The polarizer may also be of film type or liquid crystal coating type. A film-type phase retarder and a film-type polarizer may each comprise a stretched synthetic resin film, and a liquid crystal coating-type phase retarder and a liquid crystal coating-type polarizer may each comprise liquid crystal arranged in a desired direction (e.g., a given or predetermined direction). The phase retarder and the polarizer may be implemented together with a polarizing film.

[0068] As an example, the anti-reflective layer may also include a color filter. This can be considered from multiple pixel PXs included in the display panel DP (see, for example, [link to relevant documentation]). Figure 3 The arrangement of the color filters is determined by the color of the light generated. In this case, the antireflective layer may also include a light-blocking pattern disposed between the color filters.

[0069] The display module DM can display an image IM based on electrical signals and can send / receive information about external inputs. The display module DM can be defined by an active region AA and an active region NAA. The active region AA can be defined as the area through which the image IM is output from the display panel DP (e.g., the area where the image IM is displayed). Furthermore, the active region AA can be defined as the area where the input sensing layer ISP senses external input applied from the outside. According to an embodiment, the active region AA of the display module DM can correspond to at least a portion of the display region DA (e.g., it can overlap with at least a portion of the display region DA).

[0070] The non-active region NAA is adjacent to the active region AA. The non-active region NAA can be an area in which the image IM is not substantially displayed. For example, the non-active region NAA can surround the active region AA (e.g., around the periphery of the active region AA). However, this disclosure is not limited thereto. The non-active region NAA can be defined in various suitable shapes and is not particularly limited. According to an embodiment, the non-active region NAA of the display module DM can correspond to at least a portion of the non-display region NDA (e.g., it can overlap with at least a portion of the non-display region NDA).

[0071] The display device DD may also include multiple flexible films FF connected to the display panel DP. A driver chip DIC may be mounted on each of the flexible films FF. For example, a source drive circuit 200 (see, for example, see...) Figure 3 It may include multiple driver chips (DICs), and the multiple driver chips (DICs) may be mounted on multiple flexible films (FFs) respectively.

[0072] The display device DD may also include at least one circuit board PCB coupled to a plurality of flexible films FF. As an example, two circuit board PCBs may be provided in the display device DD, but the number of circuit board PCBs is not limited thereto. Two adjacent circuit board PCBs may be electrically connected to each other via a connecting film CF. Furthermore, at least one of the circuit board PCBs may be electrically connected to a motherboard. Drive controller 100 (e.g., see...) Figure 3 Voltage generator 400 (for example, see voltage generator 400) Figure 3 ) and voltage detector 500 (for example, see Figure 3 It can be set on at least one of the circuit boards (PCBs).

[0073] Figure 2 The diagram illustrates a structure in which driver chips (DICs) are mounted on flexible films (FF), but this disclosure is not limited to this. For example, the driver chips (DICs) can be directly mounted on the display panel (DP). In this case, the portion of the display panel (DP) on which the driver chips (DICs) are mounted can be bent so that the driver chips (DICs) are positioned on the rear surface of the display module (DM).

[0074] The input sensing layer (ISP) can be electrically connected to the circuit board (PCB) via a flexible film (FF). However, this disclosure is not limited thereto. In other words, in some embodiments, the display module (DM) may additionally include a separate flexible film for electrically connecting the input sensing layer (ISP) and the circuit board (PCB).

[0075] The display device DD also includes a housing EDC for housing the display module DM. The housing EDC may be coupled to a window WM to define the appearance of the display device DD. The housing EDC can absorb external impacts and can prevent or substantially prevent foreign objects / moisture from penetrating into the display module DM, thereby protecting the components housed within the housing EDC. As an example, the housing EDC may be provided as a combination of multiple housing components.

[0076] The display device DD according to an embodiment may further include: an electronic module (e.g., an electronic component or a sensor) including various functional modules (e.g., functional components or sensors) for operating the display module DM; a power module (e.g., a power supply or a battery) for supplying power for the overall operation of the display device DD; and a bracket coupled to the display module DM and / or the housing EDC to divide the internal space of the display device DD; and so on.

[0077] Figure 3 This is a block diagram of a display device according to an embodiment of the present disclosure.

[0078] refer to Figure 3 The display device DD includes a drive controller 100, a panel driver PDD, a voltage generator (e.g., a voltage generation circuit) 400, a voltage detector (e.g., a voltage detection circuit) 500, and a display panel DP. As an example, the panel driver PDD may include a source drive circuit 200 and a scan drive circuit 300. The source drive circuit 200 may include a data driver and a sensing driver.

[0079] The display panel DP includes drive scan lines SCL1, SCL2, SCL3, ... and SCLn, sensing scan lines SSL1, SSL2, SSL3, ... and SSLn, data lines DL1, DL2, ... and DLm, multiple sensing lines RL1, RL2, ... and RLm, and pixels PX, where n and m are each integers greater than 1. The display panel DP can be divided into an active region AA and a non-active region NAA. Pixels PX can be located in the active region AA. The scan drive circuit 300 can be located in the non-active region NAA.

[0080] The drive scan lines SCL1 to SCLn and the sensing scan lines SSL1 to SSLn extend parallel to or substantially parallel to the first direction DR1 and are arranged spaced apart from each other in the second direction DR2. The second direction DR2 may be a direction that intersects or crosses the first direction DR1. The data lines DL1 to DLm extend from the source drive circuit 200 parallel to or substantially parallel to the second direction DR2 and are arranged spaced apart from each other in the first direction DR1. The sensing lines RL1 to RLm may extend in the second direction DR2 and may be arranged spaced apart from each other along the first direction DR1.

[0081] Multiple pixels PX can be electrically connected to drive scan lines SCL1 to SCLn, sensing scan lines SSL1 to SSLn, data lines DL1 to DLm, and sensing lines RL1 to RLm. Each of the multiple pixels PX can be electrically connected to two scan lines. However, the number of scan lines connected to each of the pixels PX is not limited to this. For example, each pixel PX can be electrically connected to one scan line or three scan lines.

[0082] Each of the multiple pixels PX includes a light-emitting element ED (e.g., see...). Figure 4A ) and pixel circuitry PXC for controlling the emission of the light-emitting element ED (see, for example, [link to relevant documentation]). Figure 4A A pixel circuit (PXC) may include multiple transistors and capacitors.

[0083] The drive controller 100 receives input image signals RGB and control signals CTRL from a main processor (e.g., a microcontroller or a graphics controller). The drive controller 100 can generate image data IDT by converting the input image signals RGB.

[0084] The drive controller 100 generates a scan control signal GCS and a source control signal DCS based on the control signal CTRL. The source drive circuit 200 receives the source control signal DCS and image data IDT from the drive controller 100, and converts the image data IDT into a data signal in response to the source control signal DCS. The source drive circuit 200 outputs data signals to multiple data lines DL1 to DLm. The data signals can be analog voltages corresponding to the grayscale values ​​of the image data IDT.

[0085] The source drive circuit 200 is connected to multiple sensing lines RL1 to RLm. The source drive circuit 200 can also receive sensing control signals from the drive controller 100 and can sense the characteristics of the elements in each of the pixels PX included in the display panel DP in response to the sensing control signals.

[0086] As an example, the source drive circuit 200 can be formed using at least one chip (e.g., an integrated circuit). The source drive circuit 200 can be set in... Figure 2 The driver chip DIC shown is located in the DIC.

[0087] The scan drive circuit 300 receives a scan control signal GCS from the drive controller 100. The scan drive circuit 300 can output a scan signal in response to the scan control signal GCS. The scan drive circuit 300 can be integrated into the display panel DP. When the scan drive circuit 300 is embedded in the display panel DP, the scan drive circuit 300 may include transistors formed using the same process as that used in pixel circuits (PXC).

[0088] The scan drive circuit 300 can generate multiple drive scan signals and multiple sensing scan signals in response to the scan control signal GCS. The multiple drive scan signals are applied to drive scan lines SCL1 to SCLn. The multiple sensing scan signals are applied to sensing scan lines SSL1 to SSLn.

[0089] As an example, the scan drive circuit 300 includes a first scan drive circuit 310 and a second scan drive circuit 320. The first scan drive circuit 310 is located on the left side of the active region AA. The second scan drive circuit 320 is located on the right side of the active region AA. The first scan drive circuit 310 receives a first scan control signal GCS1 from the driver controller 100, and the second scan drive circuit 320 receives a second scan control signal GCS2 from the driver controller 100. The first scan drive circuit 310 can generate multiple drive scan signals and multiple sensing scan signals in response to the first scan control signal GCS1. The second scan drive circuit 320 can generate multiple drive scan signals and multiple sensing scan signals in response to the second scan control signal GCS2.

[0090] Figure 3 The diagram shows a structure in which the first scan driving circuit 310 and the second scan driving circuit 320 are located on the left and right sides of the active region AA, respectively, but this disclosure is not limited thereto. For example, the scan driving circuit 300 may include only one of the first scan driving circuit 310 and the second scan driving circuit 320.

[0091] Each of the multiple pixels PX can receive a first driving voltage ELVDD and a second driving voltage ELVSS.

[0092] Voltage generator 400 generates voltages for operating the display panel DP. In embodiments of this disclosure, voltage generator 400 generates a first driving voltage ELVDD and a second driving voltage ELVSS for operating the display panel DP. The first driving voltage ELVDD and the second driving voltage ELVSS can be provided to the display panel DP via a first driving voltage line VL1 and a second driving voltage line VL2, respectively. As an example, the second driving voltage line VL2 can be connected to, for example... Figure 4A The cathode of the light-emitting element ED shown in the figure.

[0093] In addition to the first drive voltage ELVDD and the second drive voltage ELVSS, the voltage generator 400 can also generate various suitable voltages (e.g., gamma reference voltage, data drive voltage, gate on voltage, and gate off voltage) for the operation of the source drive circuit 200 and the scan drive circuit 300.

[0094] Voltage detector 500 can be connected to one of the first drive voltage line VL1 and the second drive voltage line VL2, and can sense the sensed voltage corresponding to the current flowing through one of the first drive voltage line VL1 and the second drive voltage line VL2 in real time. Voltage detector 500 outputs a sensed signal DS based on the sensed voltage. As an example, Figure 3The diagram shows a structure in which the voltage detector 500 is connected to the second drive voltage line VL2, but this disclosure is not limited thereto. For example, the voltage detector 500 may be connected to the first drive voltage line VL1.

[0095] The drive controller 100 receives a sensing signal DS from the voltage detector 500 and generates a voltage control signal VCS based on the sensing signal DS. The voltage generator 400 can determine the voltage level of one of the first drive voltage ELVDD and the second drive voltage ELVSS based on the voltage control signal VCS received from the drive controller 100.

[0096] Figure 4A This is an equivalent circuit diagram of a pixel according to an embodiment of the present disclosure. Figure 4B It is a diagram. Figure 4A The waveform diagram shows the operation of the pixel during the sensing cycle.

[0097] Figure 4A Show Figure 3 The equivalent circuit diagram of the first pixel PX11 among the plurality of pixels PX shown is shown. Since each of the plurality of pixels PX may have the same or substantially the same circuit structure as the first pixel PX11, the circuit structure of the first pixel PX11 will be described in more detail below, and redundant descriptions of the remaining pixels among the plurality of pixels PX will not be repeated.

[0098] refer to Figure 4A The first pixel PX11 is connected to the first data line DL1, the first drive scan line SCL1, the first sensing scan line SSL1, and the first sensing line RL1.

[0099] The first pixel PX11 includes a light-emitting element ED and a pixel circuit PXC. The light-emitting element ED can be a light-emitting diode. As an example, the light-emitting element ED can be an organic light-emitting diode including an organic light-emitting layer. The light-emitting element ED can be one of a red light-emitting diode for emitting red light, a green light-emitting diode for emitting green light, and a blue light-emitting diode for emitting blue light.

[0100] The pixel circuit PXC includes a first transistor PT1, a second transistor PT2, and a third transistor PT3, and a capacitor Cst. At least one of the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be an oxide transistor having an oxide semiconductor layer. Each of the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be an N-type transistor. However, this disclosure is not limited thereto. For example, each of the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be a P-type transistor. As another example, some of the transistors in the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be N-type transistors, and the other transistors in the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be P-type transistors. In some embodiments, at least one of the first transistor PT1, the second transistor PT2, and the third transistor PT3 may be a transistor having a low-temperature polycrystalline silicon (LTPS) semiconductor layer.

[0101] The configuration of the pixel circuit PXC according to embodiments of this disclosure is not limited to... Figure 4A The configuration shown in the diagram. Figure 4A The pixel circuit PXC illustrated in the figure is provided as an example. For example, the configuration of the pixel circuit PXC can be modified and implemented in various ways as needed or desired. For instance, the third transistor PT3 can be omitted from the pixel circuit PXC as needed or desired.

[0102] A first transistor PT1 (e.g., referred to as a "driving transistor") is connected between a first driving voltage line VL1 for receiving a first driving voltage ELVDD and a light-emitting element ED. The first transistor PT1 includes: a first electrode connected to the first driving voltage line VL1; a second electrode electrically connected to the anode of the light-emitting element ED; and a third electrode connected to one end of a capacitor Cst. The contact point where the anode of the light-emitting element ED is connected to the second electrode of the first transistor PT1 may be referred to as the "first node N1". As used herein, the phrase "transistor connected to a signal line" means that one of the first, second, and third electrodes of the transistor is integrated with or connected to a signal line via a connecting electrode. Furthermore, the phrase "transistor electrically connected to another transistor" means that one of the first, second, and third electrodes of the transistor is integrated with or connected to one of the first, second, and third electrodes of another transistor via a connecting electrode.

[0103] The first transistor PT1 can receive the data voltage V_data or sensed data voltage SV_data transmitted through the first data line DL1 according to the switching operation of the second transistor PT2, and can then supply drive current to the light-emitting element ED.

[0104] A second transistor PT2 (e.g., referred to as a "switching transistor") is connected between the first data line DL1 and the third electrode of the first transistor PT1. The second transistor PT2 includes a first electrode connected to the first data line DL1, a second electrode connected to the third electrode of the first transistor PT1, and a third electrode connected to the first drive scan line SCL1. The contact point where the second electrode of the second transistor PT2 connects to the third electrode of the first transistor PT1 can be referred to as the "second node N2". The second transistor PT2 is turned on in response to a first drive scan signal SC1 received via the first drive scan line SCL1, and can transmit the data voltage V_data transmitted from the first data line DL1 or the sensed data voltage SV_data to the third electrode of the first transistor PT1.

[0105] A third transistor PT3 is connected between the second electrode of the first transistor PT1 and the first sensing line RL1. The third transistor PT3 includes a first electrode connected to the first node N1, a second electrode connected to the first sensing line RL1, and a third electrode connected to the first sensing scan line SSL1. The third transistor PT3 can be turned on in response to a first sensing scan signal SS1 received through the first sensing scan line SSL1, thereby electrically connecting the first sensing line RL1 and the first node N1 to each other.

[0106] One end of capacitor Cst is connected to the second node N2, and the other end of capacitor Cst (e.g., the opposite end) is connected to the first node N1. The cathode of the light-emitting element ED can be connected to the second drive voltage line VL2, which transmits the second drive voltage ELVSS. The voltage level of the second drive voltage ELVSS can be lower than the voltage level of the first drive voltage ELVDD.

[0107] The light-emitting element ED may include an anode connected to a second electrode (e.g., a first node N1) of the first transistor PT1, and a cathode for receiving a second drive voltage ELVSS. The light-emitting element ED can generate light corresponding to the amount of current supplied from the first transistor PT1.

[0108] As an example, the display device DD (see, for example, see...) Figure 3Images are displayed in frames. A frame may include a display period in which the image is displayed and a blanking period in which the image is not displayed. During the display period, a data voltage V_data is applied to the first data line DL1, and an initialization voltage VINT is applied to the first sensing line RL1. The initialization voltage VINT may be the voltage used to initialize the first node N1. When the third transistor PT3 is turned on according to the first sensing scan signal SS1 during the display period, the first node N1 may be initialized to the initialization voltage VINT. The display period may be referred to as the "non-sensing period".

[0109] The blanking period may include a sensing period SP. The sensing period SP may include: a write period SP1, in which a first drive scan signal SC1 and a first sensing scan signal SS1 are activated concurrently (e.g., simultaneously or substantially simultaneously); and a readout period SP2, in which only the first sensing scan signal SS1 is activated. During the write period SP1, a sensing data voltage SV_data is applied to the first data line DL1, and an initialization voltage VINT is applied to the first sensing line RL1. During the readout period SP2, the initialization voltage VINT is not applied to the first sensing line RL1.

[0110] During the write cycle SP1, the second transistor PT2 can be turned on in response to the first drive scan signal SC1, and the third transistor PT3 can be turned on in response to the first sensing scan signal SS1.

[0111] The sensed data voltage SV_data can be applied to the second node N2 (e.g., the third electrode of the first transistor PT1) via the first data line DL1 and the turned-on second transistor PT2. The sensed data voltage SV_data can be a voltage applied to data lines DL1 to DLm during the sensing period SP, and can be a voltage suitable for current sensing (e.g., set for current sensing). The initialization voltage VINT can be applied to the first node N1 (e.g., the second electrode of the first transistor PT1 or the anode of the light-emitting element ED) via the first sense line RL1 and the turned-on third transistor PT3.

[0112] The voltage between the second node N2 and the first node N1 can be the difference between the sensed data voltage SV_data and the initialization voltage VINT. The charge corresponding to the difference between the sensed data voltage SV_data and the initialization voltage VINT can be charged into the capacitor Cst. The voltage between the second node N2 and the first node N1 can be defined as the gate-source voltage of the first transistor PT1.

[0113] After the write cycle SP1 ends, the first drive scan signal SC1 can be disabled, and the second transistor PT2 can be turned off. Even if the second transistor PT2 is turned off, the voltage between the second node N2 and the first node N1 can be maintained or substantially maintained through the capacitor Cst during the read cycle SP2.

[0114] Since the voltage between the second node N2 and the first node N1 can be greater than the threshold voltage of the first transistor PT1, a current (hereinafter referred to as "drain current Id") can flow through the first transistor PT1 during the readout cycle SP2. During the readout cycle SP2, the potential of the first node N1 can be boosted by the drain current Id, while maintaining the voltage between the second node N2 and the first node N1. During the readout cycle SP2, the drain current Id can be output to the first sensing line RL1 through the conducting third transistor PT3. The current output through the first sensing line RL1 can be referred to as the "pixel sensing current Ips".

[0115] Figure 5A This is a block diagram illustrating a voltage detector according to an embodiment of the present disclosure. Figure 5B This is a block diagram of a drive controller according to an embodiment of the present disclosure.

[0116] refer to Figure 5A Also refer to Figure 4A The voltage detector 500 includes a detection unit (e.g., a detection circuit) 510, an amplification unit (e.g., an amplification circuit) 520, a gain control unit (e.g., a gain control circuit) 530, and a conversion unit (e.g., a conversion circuit) 540.

[0117] The detection unit 510 includes a sensing resistor Rs connected between the voltage generator 400 and the second drive voltage line VL2. The sensing resistor Rs senses the voltage (which may be referred to as the "sensing voltage" or "cathode voltage") corresponding to the current Is flowing into the second drive voltage line VL2 (which may be referred to as the "sensing current" or "cathode current"). As an example, when the voltage detector 500 senses the voltage corresponding to the current Is flowing into the second drive voltage line VL2, the sensing resistor Rs may be connected between the voltage generator 400 and the second drive voltage line VL2. However, this disclosure is not limited thereto. For example, when the voltage detector 500 senses the voltage corresponding to the current flowing into the first drive voltage line VL1, the sensing resistor Rs may be connected between the voltage generator 400 and the first drive voltage line VL1.

[0118] Amplification unit 520 includes: a first input terminal T1i, connected to a first terminal of a sensing resistor Rs and used to receive a first sensed voltage Vs1; a second input terminal T2i, connected to a second terminal of the sensing resistor Rs and used to receive a second sensed voltage Vs2; and an output terminal To, used to output an output voltage Vo. The sensed voltage can refer to either the first sensed voltage Vs1 or the second sensed voltage Vs2. Amplification unit 520 may include an operational amplifier AMP and a transistor TR. The non-inverting terminal (e.g., the first terminal) of the operational amplifier AMP is connected to the first input terminal T1i, and the inverting terminal (e.g., the second terminal) of the operational amplifier AMP is connected to the second input terminal T2i. As an example, amplification unit 520 may further include: a first resistor R1, connected between the non-inverting terminal of the operational amplifier AMP and the first input terminal T1i; and a second resistor R2, connected between the inverting terminal of the operational amplifier AMP and the second input terminal T2i. The first resistor R1 and the second resistor R2 can set the voltage amplification rate of the operational amplifier AMP. The operational amplifier AMP can amplify the difference between the first sense voltage Vs1 and the second sense voltage Vs2, and output the amplified voltage.

[0119] The transistor TR includes an input electrode connected to the non-inverting terminal of the operational amplifier AMP, a control electrode connected to the output terminal of the operational amplifier AMP, and an output electrode connected to the output terminal To of the amplification unit 520. The transistor TR can operate in response to an amplified voltage output through the output terminal of the operational amplifier AMP, and can output a first sensed voltage Vs1 to the output terminal To of the amplification unit 520. When the amplified voltage is large (e.g., when the difference between the first sensed voltage Vs1 and the second sensed voltage Vs2 is large), the drive current of the transistor TR can increase, and therefore, the amplification unit 520 can output a relatively high output voltage Vo. However, when the amplified voltage is small (e.g., when the difference between the first sensed voltage Vs1 and the second sensed voltage Vs2 is small), the drive current of the transistor TR can decrease, and therefore, the amplification unit 520 can output a relatively low output voltage Vo.

[0120] The gain control unit 530 can adjust the amplification rate (e.g., gain) of the amplification unit 520. As an example, the gain control unit 530 may include a gain adjustment resistor connected between the output terminal To of the amplification unit 520 and a ground terminal to which a ground voltage is applied.

[0121] The conversion unit 540 can receive the output voltage Vo and convert the output voltage Vo into a sensing signal DS. As an example, the output voltage Vo can be an analog signal, and the sensing signal DS can be a digital signal. In other words, the conversion unit 540 can be an analog-to-digital converter that converts an analog signal into a digital signal.

[0122] refer to Figure 5A and Figure 5B Also refer to Figure 3 and Figure 4A The drive controller 100 includes a comparison unit (e.g., comparator) 110, a lookup table (LUT) 130, and a control unit (e.g., controller) 120. The LUT 130 stores reference drive voltages corresponding to a plurality of reference signals (e.g., a plurality of predetermined reference signals). The comparison unit 110 receives a sensing signal DS from a voltage detector 500 (e.g., from a conversion unit 540) and selects a reference drive voltage corresponding to the sensing signal DS from the LUT 130. When the voltage detector 500 is connected to the second drive voltage line VL2, the reference drive voltage may have an initial voltage level IVL higher than or equal to the second drive voltage ELVSS (e.g., see [link to relevant documentation]). Figure 6A and Figure 6B The voltage level of the reference drive voltages. For example, when the initial voltage level IVL of the second drive voltage ELVSS is about -3.5V, each of the reference drive voltages can have a voltage level between about -3.5V and about 0V. When the voltage detector 500 is connected to the first drive voltage line VL1, each of the reference drive voltages can have a voltage level lower than or equal to the initial voltage level IVL of the first drive voltage ELVDD.

[0123] Comparison unit 110 provides a reference drive voltage corresponding to the sensing signal DS to control unit 120. Control unit 120 can adjust voltage control signal VCS such that the second drive voltage ELVSS output from voltage generator 400 has a voltage level corresponding to the reference drive voltage. Voltage control signal VCS can be provided by voltage generator 400. Voltage generator 400 can adjust the voltage level of second drive voltage ELVSS based on voltage control signal VCS. As an example, voltage control signal VCS can be a square wave signal. Control unit 120 can adjust the duty cycle of voltage control signal VCS according to the reference drive voltage. For example, when the reference drive voltage has the same or substantially the same voltage level as the initial voltage level IVL of second drive voltage ELVSS, voltage control signal VCS can have a maximum duty cycle (e.g., a predetermined maximum duty cycle). When the reference drive voltage has a voltage level higher than the initial voltage level IVL of second drive voltage ELVSS, voltage control signal VCS can have a duty cycle less than the maximum duty cycle. When a voltage control signal VCS with a duty cycle less than the maximum duty cycle is received, the voltage generator 400 can adjust the voltage level of the second drive voltage ELVSS to be higher than the initial voltage level IVL. The adjusted voltage level of the second drive voltage ELVSS can be referred to as the "adjusted voltage level CVL" (see, for example, [reference needed]). Figure 6A and Figure 6B ).

[0124] Figure 6A and Figure 6B This is a graph illustrating the power consumption reduction based on brightness and occupancy rate implemented by a voltage detector according to some embodiments of the present disclosure.

[0125] refer to Figures 5A to 6B The magnitude of the sensing current Is can be determined by the brightness of the image displayed in the display panel DP and the occupancy rate of the area displaying the high-brightness image. In other words, when the peak brightness of the image displayed in the display panel DP is high and the occupancy rate of the area with peak brightness is high, the sensing current Is can be increased. However, when the peak brightness is low and the occupancy rate of the area with peak brightness is low, the sensing current Is can be decreased.

[0126] Figure 6A The diagram shows the sensed current Is, measured based on peak brightness and occupancy, and the correspondingly adjusted second drive voltage ELVSS in a display panel DP with a peak brightness of approximately 400 nits (see, for example, [link to relevant documentation]). Figure 3 The adjusted voltage level CVL.

[0127] refer to Figure 6A Also refer to Figure 3When the peak brightness of the image displayed in the display panel DP is approximately 400 nits and the occupancy rate of the area with peak brightness is approximately 100%, the second drive voltage can have a voltage level of approximately -2.3V (e.g., initial voltage level IVL). However, when the peak brightness of the image is 210 nits and the occupancy rate of the area with peak brightness is approximately 53%, the sensing current decreases, and therefore, the second drive voltage ELVSS can have a regulated voltage level CVL of approximately -2.0V. In this case, it is possible to realize the display device DD (e.g., see...) Figure 3 The total power consumption is reduced by approximately 4.3%. When the peak brightness of the image is 70 nits and the occupancy of the area with peak brightness is approximately 18%, the sensing current can be further reduced, and therefore, the second drive voltage ELVSS can have a regulated voltage level CVL of approximately -1.6V. In this case, the total power consumption of the display device DD can be reduced by approximately 10.1%. In other words, the power consumption reduction effect can be increased as the peak brightness and occupancy decrease.

[0128] Figure 6B The diagram shows the sensed current Is, measured based on peak brightness and occupancy, and the correspondingly adjusted second drive voltage ELVSS in a display panel DP with a peak brightness of up to approximately 620 nits (see, for example, [link to relevant documentation]). Figure 3 The adjusted voltage level CVL.

[0129] refer to Figure 6B Also refer to Figure 3 When the peak brightness of the image displayed in the display panel DP is approximately 620 nits and the occupancy of the area with peak brightness is approximately 100%, the second drive voltage can have a voltage level of approximately -3.5V (e.g., initial voltage level IVL). However, when the peak brightness of the image is approximately 320 nits and the occupancy of the area with peak brightness is approximately 52%, the sensing current decreases, and therefore, the second drive voltage ELVSS can have an regulated voltage level of approximately -3.2V CVL. In this case, it is possible to realize the display device DD (e.g., see...) Figure 3 The total power consumption is reduced by approximately 3.7%. When the peak brightness of the image is approximately 100 nits and the occupancy of the area with peak brightness is approximately 16%, the sensing current can be further reduced, and therefore, the second drive voltage ELVSS can have a regulated voltage level CVL of approximately -3.0V. In this case, the total power consumption of the display device DD can be reduced by approximately 6.2%. In other words, the power consumption reduction effect can be increased as the peak brightness and occupancy decrease.

[0130] As the voltage level of the second driving voltage ELVSS generated by the voltage generator 400 decreases and the voltage level of the first driving voltage ELVDD increases, the power consumption of the display device DD increases. Therefore, the second driving voltage ELVSS can be adjusted to have an optimal or improved voltage level based on the sensing current Is flowing through the voltage detector 500, thereby reducing the power consumption of the display device DD.

[0131] Figure 7 This is a block diagram illustrating a voltage detector according to an embodiment of the present disclosure.

[0132] refer to Figure 7 The voltage detector 500a includes a detection unit 510, an amplification unit 520, a gain control unit (e.g., a gain control circuit) 535, and a conversion unit 540. Figure 7 The configuration of the detection unit 510, amplification unit 520, and conversion unit 540 shown in the diagram is consistent with the above reference. Figure 5A The detection unit 510, amplification unit 520 and conversion unit 540 described are configured the same or substantially the same, and therefore their redundant descriptions will not be repeated below.

[0133] The gain control unit 535 can adjust the amplification rate (e.g., gain) of the amplification unit 520. As an example, the gain control unit 535 may include a digital variable resistor connected to the output terminal To of the amplification unit 520. The gain control unit 535 can receive a gain adjustment signal GS from the drive controller 100 and can change the voltage level of the digital variable resistor based on the gain adjustment signal GS.

[0134] Figure 5A The gain control unit 530 illustrated in the diagram includes a gain adjustment resistor with a fixed level, and therefore, the amplification of the amplification unit 520 can be fixed to the value initially set by the gain adjustment resistor. However, as Figure 7 As shown, when the gain control unit 535 includes a digital variable resistor, the gain control unit 535 can adjust the amplification rate of the amplification unit 520 taking into account environmental conditions (e.g., temperature or degradation of the light-emitting element). Therefore, the voltage detector 500a can sense the sensed voltage more accurately, unaffected by environmental conditions.

[0135] Figure 8 This is a block diagram of a display device according to an embodiment of the present disclosure. Figure 9 This is a block diagram illustrating a voltage controller according to an embodiment of the present disclosure. Figure 8 In the figures, the same reference numerals are used to indicate references above. Figure 3 The components described are the same or substantially the same, and therefore their redundant descriptions will not be repeated below.

[0136] refer to Figure 8 The display device DDa includes a drive controller 100, a source drive circuit 200, a scan drive circuit 300, a voltage generator (e.g., a voltage generation circuit) 400, a voltage controller (e.g., a voltage control circuit) 600, and a display panel DP.

[0137] The voltage controller 600 can be connected to one of the first drive voltage line VL1 and the second drive voltage line VL2, and can sense in real time the sensed voltage corresponding to the current flowing through one of the first drive voltage line VL1 and the second drive voltage line VL2. The voltage controller 600 generates a sensed signal DS based on the sensed voltage (see, for example, [reference needed]). Figure 3 The voltage generator 400 outputs a voltage control signal VCS based on the sensing signal DS. The voltage generator 400 can determine the voltage level of either the first drive voltage ELVDD or the second drive voltage ELVSS based on the voltage control signal VCS.

[0138] As an example, Figure 8 The diagram shows a structure in which the voltage controller 600 is connected to the second drive voltage line VL2, but this disclosure is not limited thereto. For example, the voltage controller 600 may be connected to the first drive voltage line VL1.

[0139] refer to Figure 9 Also refer to Figure 8 The voltage controller 600 includes a detection unit (e.g., a detection circuit) 610, an amplification unit (e.g., an amplification circuit) 620, a gain control unit (e.g., a gain control circuit) 630, a conversion unit (e.g., a conversion circuit) 640, and a control unit (e.g., a controller) 650. Figure 9 The configuration of the detection unit 610, amplification unit 620, gain control unit 630, and conversion unit 640 shown in the diagram is consistent with the above reference. Figure 5A The detection unit 510, amplification unit 520, gain control unit 530 and conversion unit 540 described are configured the same or substantially the same, and therefore their redundant descriptions will not be repeated below.

[0140] The control unit 650 can receive a sensing signal DS from the conversion unit 640 and can select a reference driving voltage corresponding to the sensing signal DS from a lookup table storing multiple reference driving voltages corresponding to multiple reference signals. The control unit 650 can adjust a voltage control signal VCS such that the second driving voltage ELVSS output from the voltage generator 400 has a voltage level corresponding to the selected reference driving voltage. The voltage control signal VCS can be provided by the voltage generator 400. The voltage generator 400 can adjust the voltage level of the second driving voltage ELVSS based on the voltage control signal VCS. As an example, the voltage control signal VCS can be a square wave signal. The control unit 650 can adjust the duty cycle of the voltage control signal VCS according to the reference driving voltage.

[0141] As an example, the conversion unit 640 and the control unit 650 can be embedded in a voltage control chip 660. However, this disclosure is not limited thereto, and the conversion unit 640 and the control unit 650 can be implemented as separate chips.

[0142] In this way, the second drive voltage ELVSS can be adjusted to have an optimal or improved voltage level based on the sensed current Is flowing through the voltage controller 600, thereby reducing the power consumption of the display device DDa.

[0143] Figure 10 This is a block diagram illustrating a voltage controller according to an embodiment of the present disclosure.

[0144] refer to Figure 10 The voltage controller 600a includes a detection unit 610, an amplification unit 620, a gain control unit (e.g., a gain control circuit) 635, a conversion unit 640, and a control unit 650. Figure 10 The configuration of the detection unit 610, amplification unit 620, conversion unit 640, and control unit 650 shown in the diagram is consistent with the above reference. Figure 9 The detection unit 610, amplification unit 620, conversion unit 640 and control unit 650 described are configured the same or substantially the same, and therefore their redundant descriptions will not be repeated below.

[0145] The gain control unit 635 can adjust the amplification rate (e.g., gain) of the amplification unit 620. As an example, the gain control unit 635 may include a digital variable resistor connected to the output terminal To of the amplification unit 620. The gain control unit 635 may receive a gain adjustment signal GS from the control unit 650 (e.g., embedded in a voltage control chip 660) and may change the voltage level of the digital variable resistor based on the gain adjustment signal GS.

[0146] Figure 9The gain control unit 630 illustrated in the diagram includes a gain adjustment resistor with a fixed level, and therefore, the amplification of the amplification unit 620 can be fixed to the value initially set by the gain adjustment resistor. However, as Figure 10 As shown, when the gain control unit 635 includes a digital variable resistor, the gain control unit 635 can adjust the amplification rate of the amplification unit 620 taking into account environmental conditions (e.g., temperature or degradation of the light-emitting element). Therefore, the voltage controller 600a can sense the sensed voltage more accurately, unaffected by environmental conditions.

[0147] Figure 11 This is a plan view of a display device according to an embodiment of the present disclosure.

[0148] refer to Figure 11 The display device DD includes a display panel DP, multiple flexible films FF, multiple driver chips DIC, and a circuit board PCB. As an example, the driver chips DIC can be mounted on the non-active area NAA of the display panel DP.

[0149] It can be displayed on the DP panel (for example, see...) Figure 2 The entire active region AA (e.g., see [reference]). Figure 3 A common cathode electrode CE is formed on the pixel PX (e.g., see [link]). The common cathode electrode CE can be formed on the pixel PX (e.g., see [link]). Figure 3 The light-emitting element ED in each of them (e.g., see...) Figure 4A The common cathode electrode CE is electrically connected to the second drive voltage line VL2.

[0150] The display device DD also includes a voltage generator 400 and a voltage detector 500 (see, for example, see...). Figure 5A ) or 500a (for example, see Figure 7 As an example, the voltage generator 400 and the voltage detector 500 or 500a can be placed on a circuit board (PCB). Although Figure 11 Only a partial configuration of the voltage detector 500 or 500a is shown, but the remaining configurations can also be placed on the PCB. Furthermore, Figure 9 and Figure 10 The voltage controller 600 or 600a shown in the diagram can also be placed on a circuit board (PCB).

[0151] exist Figure 11The diagram only illustrates the structure of one voltage detector 500 or 500a connected to the display panel DP, but the disclosure is not limited thereto. For example, when the display panel DP is divided into multiple voltage detection areas, multiple voltage detectors can be connected to multiple voltage detection areas respectively. Therefore, each voltage detector can sense the sensed voltage of the corresponding voltage detection area, and thus, an optimal or improved voltage level of the second driving voltage can be set for each voltage detection area.

[0152] Figure 12 This is a block diagram of an electronic device according to an embodiment of the present disclosure.

[0153] refer to Figure 12 The electronic device 701 outputs various pieces of information through the display module 740 within the operating system. When the processor 710 executes the application stored in the memory 720, the display module 740 provides application information to the user through the display panel 741.

[0154] The processor 710 acquires external input via the input module 730 or the sensor module 761 and executes the application corresponding to the external input. For example, when a user selects the camera icon displayed on the display panel 741, the processor 710 acquires user input via the input sensor 761-2 and activates the camera module 771. The processor 710 transmits image data corresponding to the captured image acquired by the camera module 771 to the display module 740. The display module 740 can display the image corresponding to the captured image via the display panel 741.

[0155] As another example, when authenticating personal information in the display module 740, the fingerprint sensor 761-1 acquires the input fingerprint information as input data. The processor 710 compares the input data acquired by the fingerprint sensor 761-1 with the authentication data stored in the memory 720 and executes the application based on the comparison result. The display module 740 can display the information executed according to the application logic via the display panel 741.

[0156] As another example, when a music stream icon displayed in the display module 740 is selected, the processor 710 acquires user input via the input sensor 761-2 and activates the music stream application stored in the memory 720. When a music playback command is input via the music stream application, the processor 710 provides the user with sound information corresponding to the music playback command by activating the sound output module 763.

[0157] The operation of electronic device 701 has been briefly described above. The configuration of electronic device 701 will be described in more detail below. Some of the components of electronic device 701, described in more detail below, may be integrated with each other and provided as a single configuration, or a single configuration may be provided as two or more separate configurations.

[0158] refer to Figure 12 Electronic device 701 can communicate with external electronic device 702 via a network (e.g., a short-range wireless communication network or a long-range wireless communication network). According to an embodiment, electronic device 701 may include a processor 710, a memory 720, an input module 730, a display module 740, a power module 750, an embedded module 760, and an external module 770. According to an embodiment, at least one of the above-mentioned components may be omitted from electronic device 701, or one or more other components may be added. According to an embodiment, some of the above-mentioned components (e.g., sensor module 761, antenna module 762, or audio output module 763) may be integrated into another component (e.g., display module 740).

[0159] Processor 710 can execute software to control at least one other component (e.g., hardware or software component) connected to electronic device 701, and can process and compute various suitable types of data. According to embodiments, as at least part of data processing or computation, processor 710 can store instructions or data received from other components (e.g., input module 730, sensor module 761, or communication module 773) in volatile memory 721, and can process the instructions or data stored in volatile memory 721. Resulting data can be stored in non-volatile memory 722.

[0160] Processor 710 may include a main processor 711 and an auxiliary processor 712. Main processor 711 may include one or more of a central processing unit (CPU) 711-1 and an application processor (AP). Main processor 711 may also include one or more of a graphics processing unit (GPU) 711-2, a communication processor (CP), and an image signal processor (ISP). Main processor 711 may also include a neural processing unit (NPU) 711-3. NPU 711-3 may be a processor specifically designed to process artificial intelligence models. Artificial intelligence models can be generated through machine learning. Artificial intelligence models may include multiple layers of artificial neural networks (artificial neural networks). Artificial neural networks may be one of deep neural networks (DNN), convolutional neural networks (CNN), recurrent neural networks (RNN), restricted Boltzmann machines (RBM), deep belief networks (DBN), bidirectional recurrent deep neural networks (BRDNN), and deep Q-networks, or a combination of two or more of these networks, but are not limited to the examples above. In addition to hardware architecture, artificial intelligence models may additionally or alternatively include software architecture. At least two of the aforementioned processing units and processors can be implemented as an integrated component (e.g., a single chip) or as independent components (e.g., multiple chips).

[0161] The auxiliary processor 712 may include a drive controller 712-1. The drive controller 712-1 may include interface conversion circuitry and timing control circuitry. The drive controller 712-1 receives image signals from the main processor 711, converts the data format of the image signals to suit the interface specifications of the display module 740, and outputs the image data. The drive controller 712-1 can output various control signals required to drive the display module 740. The configuration of the drive controller 712-1 and... Figure 3 The configurations of the drive controllers 100 shown are substantially similar, and therefore their detailed descriptions are omitted to avoid redundancy.

[0162] The auxiliary processor 712 may further include a data conversion circuit 712-2, a gamma correction circuit 712-3, and a rendering circuit 712-4. The data conversion circuit 712-2 can receive image data from the drive controller 712-1, and can compensate the image data according to the characteristics of the electronic device 701 or user settings, so that the image is displayed with the desired brightness, or the data conversion circuit 712-2 can convert the image data to reduce power consumption or compensate for afterimages. The gamma correction circuit 712-3 can convert image data or gamma reference voltage, etc., so that the image displayed in the electronic device 701 has the desired gamma characteristics. The rendering circuit 712-4 can receive image data from the drive controller 712-1 and can render the image data taking into account the pixel arrangement of the display panel 741 applied to the electronic device 701. At least one of the data conversion circuit 712-2, the gamma correction circuit 712-3, and the rendering circuit 712-4 can be integrated into another component (e.g., the main processor 711 or the drive controller 712-1). At least one of the data conversion circuit 712-2, the gamma correction circuit 712-3, and the rendering circuit 712-4 can be integrated into the data driver 743.

[0163] The memory 720 may store various data used by at least one component of the electronic device 701 (e.g., processor 710 or sensor module 761), and input or output data for commands associated therewith. The memory 720 may include at least one of volatile memory 721 and non-volatile memory 722.

[0164] The input module 730 can receive commands or data from outside the electronic device 701 (e.g., from a user or external electronic device 702) that will be used in components of the electronic device 701 (e.g., processor 710, sensor module 761, or sound output module 763).

[0165] Input module 730 may include: a first input module 731 for inputting commands or data from a user; and a second input module 732 for inputting commands or data from an external electronic device 702. The first input module 731 may include a microphone, mouse, keyboard, buttons (e.g., keypads), or pen (e.g., a passive or active pen). The second input module 732 may support a specified protocol enabling wired or wireless connection to the external electronic device 702. According to embodiments, the second input module 732 may include an High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB) interface, a Secure Digital (SD) card interface, or an audio interface. The second input module 732 may include a connector that can physically connect to the external electronic device 702, such as an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0166] Display module 740 provides visual information to the user. Display module 740 may include a display panel 741, a scan driver 742, and a data driver 743. Display module 740 may also include a window, chassis, or bracket for protecting the display panel 741. Display module 740 may also include a light-emitting driver and a voltage generator. The voltage generator can output various voltages required to drive the display panel 741 (e.g., a first driving voltage ELVDD and a second driving voltage ELVSS; see [reference]). Figure 3 The configuration of the display panel 741, scan driver 742, data driver 743, and voltage generator is as follows: Figure 3 The configurations of the display panel DP, the first scan drive circuit 310 and the second scan drive circuit 320, the source drive circuit 200 and the voltage generator 400 shown are substantially similar, and therefore, their detailed descriptions are omitted to avoid repetition.

[0167] Power module 750 supplies power to the components of electronic device 701. Power module 750 may include a battery charged with electrical voltage. The battery may include a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell, etc. Power module 750 may include a power management integrated circuit (PMIC). The PMIC supplies optimized power to the above-described modules and those described below. Power module 750 may include a wireless power transmitting / receiving component electrically connected to the battery. The wireless power transmitting / receiving component may include multiple coil-shaped antenna radiators.

[0168] The electronic device 701 may also include an embedded module 760 and an external module 770. The embedded module 760 may include a sensor module 761, an antenna module 762, and a sound output module 763. The external module 770 may include a camera module 771, an optical module 772, and a communication module 773.

[0169] The sensor module 761 can detect input from the user's body or from a pen in the first input module 731, and can generate an electrical signal or data value corresponding to the input. The sensor module 761 may include at least one of a fingerprint sensor 761-1, an input sensor 761-2, and a digitizer 761-3.

[0170] The fingerprint sensor 761-1 can generate data values ​​corresponding to a user's fingerprint. The fingerprint sensor 761-1 may include either an optical fingerprint sensor or a capacitive fingerprint sensor.

[0171] Input sensor 761-2 can generate data values ​​corresponding to coordinate information of input via the user's body or pen. Input sensor 761-2 generates data values ​​representing changes in capacitance caused by the input. Input sensor 761-2 can sense input from a passive pen, or it can send data to or receive data from an active pen.

[0172] The input sensor 761-2 can also measure biometric signals such as blood pressure, humidity, or body fat. For example, when a user touches a part of their body to the sensor layer or sensing panel and does not move it for a specific period of time, the input sensor 761-2 can detect the biometric signal and output the user's desired information to the display module 740 based on the change in the electric field caused by that part of the body.

[0173] The digitizer 761-3 can generate data values ​​corresponding to coordinate information input via a pen. The digitizer 761-3 generates the electromagnetic change caused by the input as a data value. The digitizer 761-3 can sense input via a passive pen, or send data to or receive data from an active pen.

[0174] At least one of the fingerprint sensor 761-1, input sensor 761-2, and digitizer 761-3 can be implemented as a sensor layer formed on the display panel 741 by subsequent processes. The fingerprint sensor 761-1, input sensor 761-2, and digitizer 761-3 can be placed on the upper side of the display panel 741, but this disclosure is not limited thereto. At least one of the fingerprint sensor 761-1, input sensor 761-2, and digitizer 761-3 (e.g., digitizer 761-3) can be placed on the lower side of the display panel 741.

[0175] At least two of the fingerprint sensor 761-1, input sensor 761-2, and digitizer 761-3 can be formed into a single sensing panel using the same process. When integrated into a single sensing panel, the sensing panel can be placed between the display panel 741 and a window located above the display panel 741. According to an embodiment, the sensing panel can be placed on the window, and the position of the sensing panel is not particularly limited thereto.

[0176] At least one of the fingerprint sensor 761-1, the input sensor 761-2, and the digitizer 761-3 can be integrated into the display panel 741. In other words, at least one of the fingerprint sensor 761-1, the input sensor 761-2, and the digitizer 761-3 can be formed simultaneously by a process that forms an element (e.g., a light-emitting element or a transistor) included in the display panel 741.

[0177] Furthermore, sensor module 761 can generate electrical signals or data values ​​corresponding to the internal or external states of electronic device 701. For example, sensor module 761 may also include a gesture sensor, gyroscope sensor, barometric pressure sensor, magnetic sensor, accelerometer, grip sensor, proximity sensor, color sensor, infrared (IR) sensor, biosensor, temperature sensor, humidity sensor, or illuminance sensor.

[0178] Antenna module 762 may include one or more antennas to transmit or receive signals or power from an external source. According to an embodiment, communication module 773 may transmit or receive signals from an external electronic device via an antenna suitable for a communication method. The antenna pattern (or design pattern) of antenna module 762 may be integrated into a component of input sensor 761-2 or display module 740 (e.g., display panel 741).

[0179] The sound output module 763 may be a device for outputting audio signals to an external part of the electronic device 701, and may include, for example, a speaker for general purposes (such as multimedia playback or recording playback) and a receiver for answering telephone calls only. According to embodiments, the receiver may be implemented separately from the speaker, or it may be integrated with the speaker. The sound output mode of the sound output module 763 may be integrated into the display module 740.

[0180] Camera module 771 can capture still images or video images. According to an embodiment, camera module 771 may include one or more lenses, an image sensor, or an image signal processor. Camera module 771 may also include an infrared camera capable of measuring the presence or absence of a user, the user's position, or the user's line of sight.

[0181] The optical module 772 can provide light. The optical module 772 may include a light-emitting diode or a xenon lamp. The optical module 772 may operate in conjunction with the camera module 771, or it may operate independently of the camera module 771.

[0182] Communication module 773 can support the establishment of a wired or wireless communication channel between electronic device 701 and external electronic device 702, and enable communication through the established communication channel. Communication module 773 may include one or all of wireless communication modules (such as cellular communication modules, short-range wireless communication modules, or Global Navigation Satellite System (GNSS) communication modules) and wired communication modules (such as local area network (LAN) communication modules or power line communication modules). Communication module 773 can communicate via short-range communication networks (such as... The external electronic device 702 communicates via Wi-Fi Direct, Infrared Data Association (IrDA), or long-range communication networks (such as cellular networks, the Internet, or computer networks (e.g., LANs or WANs)). The various communication modules 773 described above can be integrated into a single chip or implemented separately on individual chips.

[0183] The input module 730, sensor module 761, and camera module 771 can be used in conjunction with the processor 710 to control the operation of the display panel 740.

[0184] The processor 710 outputs commands or data to the display module 740, sound output module 763, camera module 771, or optical module 772 based on input data received from the input module 730. For example, the processor 710 may generate image data in response to input data applied via a mouse or active pen, and output the generated image data to the display module 740, or it may generate command data in response to input data and output the generated command data to the camera module 771 or optical module 772. When no input data is received from the input module 730 during a specific period, the processor 710 may switch the operating mode of the electronic device 701 to a low-power mode or a sleep mode to reduce the power consumed in the electronic device 701.

[0185] The processor 710 outputs commands or data to the display module 740, the sound output module 763, the camera module 771, or the optical module 772 based on the sensing data received from the sensor module 761. For example, the processor 710 can compare the authentication data authorized by the fingerprint sensor 761-1 with the authentication data stored in the memory 720, and then execute an application based on the comparison result. The processor 710 can execute commands based on sensing data sensed by the input sensor 761-2 or the digitizer 761-3, or can output corresponding image data to the display module 740. When the sensor module 761 includes a temperature sensor, the processor 710 receives temperature data about the measured temperature from the sensor module 761, and can also perform brightness correction on the image data based on the temperature data.

[0186] Processor 710 can receive measurement data from camera module 771 regarding the presence or absence of a user, the user's position, and the user's gaze. Processor 710 can also perform brightness correction on image data based on the measurement data. For example, processor 710, which determines the presence or absence of a user based on input from camera module 771, can output brightness-corrected image data to display module 740 via data conversion circuit 712-2 or gamma correction circuit 712-3.

[0187] Some components can be connected to each other via communication methods between peripheral devices (e.g., buses, general purpose input / output (GPIO), serial peripheral interfaces (SPI), mobile industrial processor interfaces (MIPI), or hyperpath interconnect (UPI) links) and can exchange signals (e.g., commands or data) with each other. Processor 710 can communicate with display module 740 through mutually agreed interfaces, and for example, processor 710 can use any of the above-described communication methods, and this disclosure is not limited to the above-described communication methods.

[0188] The electronic device 701 according to the various embodiments described above can be implemented using various suitable types of devices. The electronic device 701 may include at least one of, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, and a home appliance. However, the electronic device 701 is not limited to the devices described above.

[0189] Although some embodiments of this disclosure have been described for illustrative purposes, those skilled in the art will understand that various modifications and substitutions can be made without departing from the scope and spirit of this disclosure as disclosed in the appended claims. Therefore, the technical scope of this disclosure is not limited to the detailed description herein, but should be defined by the claims.

[0190] According to some embodiments of this disclosure, by sensing a sense voltage corresponding to the current flowing through the drive voltage line via a voltage detector (or voltage controller), and by adjusting the voltage level of the drive voltage applied to the drive voltage line in real time according to the sense voltage, the drive voltage can have an optimal or improved voltage level for the image displayed on the display panel.

[0191] According to some embodiments of this disclosure, when the current flowing into the drive voltage line decreases, the voltage level of the drive voltage can be adjusted according to the decrease in current, thereby reducing unnecessary power consumption when driving the display device.

[0192] Electronic or electrical devices and / or any other related devices or components (e.g., various modules and units such as comparison units and control units) according to embodiments of the present disclosure described herein can be implemented using any suitable hardware, firmware (e.g., application-specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, various components of these devices may be formed in a single integrated circuit (IC) chip or in a separate IC chip. Furthermore, various components of these devices may be implemented on / in a flexible printed circuit film, tape-on-a-carrier package (TCP), printed circuit board (PCB), or formed on a substrate. Additionally, various components of these devices may be processes or threads running on one or more processors within one or more computing devices, executing computer program instructions, and interacting with other system components to perform the various functions described herein. The computer program instructions are stored in memory, which may be implemented in the computing device using standard memory devices such as random access memory (RAM). The computer program instructions may also be stored in other non-transitory computer-readable media such as CD-ROMs or flash drives. Furthermore, those skilled in the art will recognize that, without departing from the spirit and scope of the exemplary embodiments of this disclosure, the functions of various computing devices may be combined or integrated into a single computing device, or the functions of a particular computing device may be distributed across one or more other computing devices.

[0193] The foregoing is a description of some embodiments of this disclosure and is not to be construed as limiting the disclosure. Although some embodiments have been described, those skilled in the art will readily understand that various modifications can be made to the embodiments without departing from the spirit and scope of this disclosure. It will be understood that, unless otherwise described, the description of features or aspects in each embodiment should generally be considered as applicable to other similar features or aspects in other embodiments. Therefore, it will be apparent to those skilled in the art that, unless expressly indicated otherwise, features, characteristics, and / or elements described in connection with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in connection with other embodiments. Therefore, it will be understood that the foregoing is a description of various exemplary embodiments and is not to be construed as limiting to the specific embodiments disclosed herein, and various modifications to the disclosed embodiments and other exemplary embodiments are intended to be included within the spirit and scope of this disclosure as defined by the appended claims and their equivalents.

Claims

1. A display device, characterized by comprising: The display device includes: The display panel includes pixels configured to receive a driving voltage via a driving voltage line; A panel driver configured to drive the display panel; A voltage generator is configured to generate the drive voltage, and the voltage generator determines the voltage level of the drive voltage based on a voltage control signal; A drive controller configured to control the drive of the panel driver, and the drive controller supplying the voltage control signal to the voltage generator; and A voltage detector is located between the voltage generator and the drive voltage line, and the voltage detector is configured to sense a sense voltage corresponding to the current flowing into the drive voltage line, and the voltage detector outputs a sense signal based on the sense voltage. The drive controller is configured as follows: Receive the sensing signal from the voltage detector; and The voltage control signal is generated based on the sensing signal.

2. The display device according to claim 1, wherein The drive controller includes: A comparator configured to select a reference drive voltage corresponding to the sensed signal from a lookup table, the lookup table being configured to store a plurality of reference drive voltages corresponding to a plurality of reference signals; and The controller is configured to adjust the voltage control signal to control the drive voltage to have a voltage level corresponding to the reference drive voltage.

3. The display device according to claim 2, wherein The voltage detector includes: The detection circuit includes a sensing resistor connected between the voltage generator and the drive voltage line; An amplifier circuit is connected to a first terminal and a second terminal of the sensing resistor, and the amplifier circuit is configured to output an output voltage by amplifying the sensing voltage sensed via the first terminal; A gain control circuit configured to control the gain of the amplifier circuit; and A conversion circuit is configured to receive the output voltage from the amplification circuit, and the conversion circuit converts the output voltage into the sensing signal.

4. The display device according to claim 3, wherein The amplifier circuit includes: An operational amplifier includes a first terminal connected to the first terminal, a second terminal connected to the second terminal, and an output terminal; and The transistor includes an input electrode connected to the first terminal, a control electrode connected to the output terminal of the operational amplifier, and an output electrode connected to the output terminal of the amplifier circuit.

5. The display device according to claim 4, wherein The gain control circuit includes a gain adjustment resistor connected between the output terminal of the amplifier circuit and a ground terminal configured to receive ground voltage.

6. The display device according to claim 4, wherein The gain control circuit is configured as follows: Receives a gain control signal from the drive controller; and The gain of the amplifier circuit is controlled in response to the gain control signal.

7. The display device according to claim 3, wherein The conversion circuit includes: an analog-to-digital converter configured to convert the output voltage into the sensed signal as a digital signal; and The comparator is configured to receive the sensing signal from the conversion circuit.

8. The display device according to claim 2, characterized in that, The controller is configured to adjust the duty cycle of the voltage control signal, which is a square wave signal, to control the drive voltage to have the voltage level corresponding to the reference drive voltage.

9. The display device according to claim 1, wherein The drive voltage lines include a first drive voltage line and a second drive voltage line, and wherein the pixel includes: a drive transistor connected to the first drive voltage line configured to receive a first drive voltage; and a light emitting element connected between the drive transistor and the second drive voltage line configured to receive a second drive voltage.

10. The display device according to claim 9, wherein The voltage detector is connected between the voltage generator and the second drive voltage line included in the drive voltage lines.

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