Display device and electronic device using the same

Abstract

The present invention provides a display device that allows the brightness and luminance of the displayed image to be corrected and set. [Solution] The present invention relates to a display device, and a display device according to one embodiment includes a display panel in which a plurality of pixels are arranged in a display area to display an image, a gate drive unit for driving gate wiring in the display area, a data drive unit for driving data wiring in the display area, a timing controller for aligning input video data to match the resolution of the display area and controlling the driving timing of the gate drive unit and the data drive unit, and a data compensation processing unit that calculates the average power consumption for at least one frame of video data in a preset period of at least one frame and corrects the input video data using luminance modulation data corresponding to the average power consumption, wherein the data compensation processing unit sequentially supplies corrected video data for each frame corrected using the luminance modulation data to the data drive unit.

Description

Technical Field

[0001] The present invention relates to a display device and an electronic device using the same.

Background Art

[0002] With the progress of the information society, the requirements for display devices for displaying images are increasing in various forms. For example, display devices are applied to various electronic devices such as smartphones, digital cameras, notebook computers, navigation devices, smart TVs, etc.

[0003] The display device used in an electronic device can be a flat panel display such as a liquid crystal display device, a field emission display device, an organic light emitting display device, etc. Among such flat panel displays, an organic light emitting display device can display an image without a backlight unit that supplies light to the display panel because each pixel of the display panel includes a light emitting element that can emit light by itself.

[0004] In recent years, in order to correspond to the rated power or rated power consumption value preset for each display device, the brightness and luminance for each gradation of video data are preset so that the video is displayed without exceeding the preset rated power consumption value. At the initial setting stage and inspection stage of the display device, the display range of the brightness and luminance for each gradation of video data, etc. are set according to the rated power and rated power consumption value. However, due to differences in the specifications of the display panel, the usage environment, the continuous usage time, etc. for each display device, the actually consumed power fluctuates, so there is a problem that a difference occurs between the preset power consumption value and the actual power consumption.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] The problem that the present invention aims to solve is to provide a display device and an electronic device using the same that can calculate the amount of power consumed during the video display period associated with driving the display panel, and correct and set the brightness and luminance of the displayed video by referring to the calculated amount of power consumed.

[0007] Furthermore, the problem that the present invention aims to solve is to provide a display device and an electronic device using the same that can efficiently control the power consumption and video display quality of a product by correcting and resetting the brightness value of the video data by referring to the power consumption associated with driving the display panel.

[0008] The problems addressed by the present invention are not limited to those described above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] A display device according to one embodiment for solving the above problem includes a display panel in which a plurality of pixels are arranged in a display area to display an image, a gate drive unit for driving gate wiring in the display area, a data drive unit for driving data wiring in the display area, a timing controller that aligns input video data to match the resolution of the display area and controls the driving timing of the gate drive unit and the data drive unit, and a data compensation processing unit that calculates the average power consumption for at least one frame of video data in a preset period of at least one frame and corrects the input video data using luminance modulation data corresponding to the average power consumption, wherein the data compensation processing unit sequentially supplies corrected video data for each frame corrected using the luminance modulation data to the data drive unit.

[0010] Furthermore, a display device according to one embodiment for solving the above problem includes a display panel in which a plurality of pixels are arranged in a display area to display an image, a gate drive unit for driving gate wiring in the display area, a data drive unit for driving data wiring in the display area, a timing controller for aligning input video data to match the resolution of the display area and controlling the driving timing of the gate drive unit and the data drive unit, and a data compensation processing unit for calculating the average power consumption for at least one frame of video data and correcting the input video data according to the average power consumption.

[0011] The data compensation processing unit can calculate the average power consumption for each frame of video data in a preset period of at least one frame, select luminance modulation data corresponding to the difference between the calculated average power consumption and the reference power consumption, correct the gradation value of the video data for each frame using the luminance modulation data, and sequentially supply the corrected video data for each frame to the data drive unit.

[0012] Furthermore, an electronic device according to one embodiment for solving the above problem includes a display device for displaying an image, the display device includes a display panel in which a plurality of pixels are arranged in a display area to display an image, a gate drive unit for driving gate wiring in the display area, a data drive unit for driving data wiring in the display area, a timing controller for aligning input video data to match the resolution of the display area and controlling the driving timing of the gate drive unit and the data drive unit, and a data compensation processing unit for calculating the average power consumption for at least one frame of video data in a preset period of at least one frame and correcting the input video data using luminance modulation data corresponding to the average power consumption, the data compensation processing unit sequentially supplies corrected video data for each frame corrected using the luminance modulation data to the data drive unit. [Effects of the Invention]

[0013] According to the display device and electronic device using the same as embodiments of the present invention, power consumption and the image display quality corresponding to power consumption can be efficiently controlled by adjusting the brightness and luminance of the displayed image by referring to the power consumption associated with driving the display panel.

[0014] Furthermore, by referencing the power consumption associated with driving the display panel and resetting the brightness values ​​of the video data so that they are displayed as video, it is possible to improve the display quality, such as brightness and luminance, for videos that have low power consumption characteristics.

[0015] The effects of the embodiments are not limited to those exemplified above, and a wider variety of effects are included herein. [Brief explanation of the drawing]

[0016] [Figure 1] This is a plan view showing the configuration of a display device according to one embodiment of the present invention. [Figure 2] This is a one-sided cross-sectional view specifically showing the display device in Figure 1. [Figure 3] Figures 1 and 2 are block diagrams showing the electrical connection relationships between the display panel and the drive unit. [Figure 4] Figure 3 is an equivalent circuit diagram of one embodiment for a single pixel of the display panel shown. [Figure 5] Figure 3 is a block diagram of one embodiment that specifically shows the data compensation processing unit. [Figure 6] This flowchart sequentially shows the video data compensation processing process and the video display process according to one embodiment of the present invention. [Figure 7] Figure 5 is a graph illustrating the method for selecting luminance modulation data in the luminance modulation data selection section. [Figure 8] Figure 5 is an example table showing the compensation thresholds for each gradation of luminance modulation data stored in the compensation threshold memory unit. [Figure 9] This is a block diagram of an electronic device according to one embodiment. [Figure 10]Schematic diagram of an electronic device according to various embodiments.

Embodiments for Carrying Out the Invention

[0017] The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described in detail hereinafter together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and can be realized in various different forms. These embodiments are merely provided to complete the disclosure of the present invention and to fully inform those with ordinary knowledge in the technical field to which the present invention pertains of the scope of the invention. The present invention is defined only by the scope of the claims.

[0018] When an element or layer is referred to as “on” another element or layer, it includes all cases where another layer or another element is interposed immediately above or in the middle of the other element. The same reference numerals throughout the specification refer to the same components. Since the shapes, sizes, ratios, angles, numbers, etc. shown in the drawings for explaining the embodiments are exemplary, the present invention is not limited to the matters shown in the drawings.

[0019] The first, second, etc. are used to describe various components, but of course these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, it is of course possible that the first component described below can be the second component within the technical idea of the present invention.

[0020] The features of each of the various embodiments of the present invention can be combined or combined with each other partially or entirely, and various technical linkages and drives are possible. Each embodiment can be implemented independently of each other or can be implemented in cooperation with each other.

[0021] Hereinafter, specific embodiments will be described with reference to the accompanying drawings.

[0022] Figure 1 is a plan view showing the configuration of a display device according to one embodiment of the present invention. Figure 2 is a cross-sectional view from one side specifically showing the display device of Figure 1.

[0023] Referring to Figures 1 and 2, the display device 10 according to one embodiment can be applied to portable electronic devices such as tablet PCs (Tablet Personal Computers), PMPs (Portable Multimedia Players), navigation systems, UMPCs (Ultra Mobile PCs), e-books, electronic organizers, mobile phones, smartphones, and mobile communication terminals. For example, the display device 10 can be applied as a display module in electronic devices such as televisions, laptop computers, monitors, billboards, or the Internet of Things (IoT).

[0024] Hereinafter, an organic light-emitting display device will be used as an example of the display device 10 in one embodiment, and unless otherwise specified, the organic light-emitting display device applied to the embodiment will be abbreviated as display device 10. The display device 10 according to the embodiment is not limited to an organic light-emitting display device, and other display devices listed above or known in the art can be applied within the scope of sharing the technical idea.

[0025] A display device 10 according to one embodiment may have a rectangular, square, circular, elliptical, or square shape in a plan view. For example, when the display device 10 is used in a mobile device such as a tablet PC, it may have a rectangular shape with its longer side positioned horizontally. However, it is not limited to this, and its longer side may be positioned vertically, and it may be rotatable, with its longer side variably positioned horizontally or vertically.

[0026] The display device 10 includes a display panel 100, a touch sensing unit TSU, at least one gate drive unit 210, 211, a data drive unit 200, a timing controller 400, and a data compensation processing unit (201 in Figure 3).

[0027] The display panel 100 of the display device 10 includes a display unit DU for displaying images, and a touch sensing unit TSU for sensing touches from human body parts such as fingers or electronic pens is arranged on the display panel 100.

[0028] The display unit DU of the display panel 100 includes a plurality of pixels SP that display red, green, and blue, respectively, and can display an image via the plurality of pixels SP. Here, the display unit DU may include a plurality of pixels SP that display red, green, blue, and white, respectively. Three pixels SP that display red, green, and blue, respectively, can each be divided into one unit pixel. Alternatively, four pixels SP that display red, green, blue, and white, respectively, can each be divided into one unit pixel.

[0029] The touch sensing unit TSU may be mounted on the front of the display panel 100 or may be integrally formed with the display panel 100. Such a touch sensing unit TSU may include multiple touch electrodes and be able to sense the user's touch using a capacitive method or the like with the touch electrodes.

[0030] At least one gate drive unit 210, 211 supplies a gate scan signal to each pixel SP for each horizontal line via the gate wiring for each horizontal line of the display unit DU, based on a gate control signal from the timing controller 400. Specifically, at least one gate drive unit 210, 211 sequentially supplies a gate scan signal to the gate wiring for each horizontal line, driving the pixels SP arranged in each horizontal line to sequentially charge the data voltage. In addition, at least one gate drive unit 210, 211 supplies a light emission drive signal to the light emission control wiring for each horizontal line of the display unit DU based on the gate control signal. Here, at least one gate drive unit 210, 211 sequentially supplies a light emission drive signal to the light emission control wiring, controlling the pixel drive voltage of each pixel SP for each horizontal line to be output to the light-emitting element.

[0031] The data drive unit 200 may include a plurality of data drive integrated circuits. Based on the data drive control signal from the timing controller 400, the data drive unit 200 outputs a data voltage corresponding to the compensated video data to the pixels SP of the display unit DU. The data drive integrated circuit may supply a data voltage to the data wiring connected to each pixel SP in units of horizontal lines for each period.

[0032] The timing controller 400 may operate as the main processor or be integrated with the main processor. This allows the timing controller 400 to control the overall functions of the display device 10. For example, the timing controller 400 aligns video data input from a graphics card or external graphics system to match the resolution of the display panel 100 and supplies it to the data compensation processing unit (201 in Figure 3). It also controls the output timing of the gate scan signal for at least one gate drive unit 210, 211 and simultaneously controls the output timing of the data voltage of the data drive unit 200. At this time, the timing controller 400 generates a data control signal to control the data voltage output timing of the data drive integrated circuit included in the data drive unit 200.

[0033] Furthermore, the timing controller 400 can detect touch coordinate information contained in the touch data of the touch sensing unit TSU and then generate digital video data based on the touch coordinate information. The timing controller 400 can also execute an application indicated by an icon displayed at the user's touch coordinates. As another example, the timing controller 400 can receive coordinate data from an electronic pen or the like, determine the touch coordinates of the electronic pen, and then either generate digital video data based on the touch coordinates or execute an application indicated by an icon displayed at the touch coordinates of the electronic pen.

[0034] Referring to Figure 2 in conjunction with Figure 1, the display panel 100 can be divided into a main area MA and a sub-area SBA. The main area MA may include a display area DA equipped with pixels SP for displaying images, and a non-display area NDA arranged around the display area DA. In the display area DA, images can be displayed by emitting light from the light-emitting area or aperture area of ​​each pixel SP. To achieve this, the pixels SP of the display area DA may include a pixel circuit including a switching element, a pixel defining film that defines the light-emitting area or aperture area, and a self-light-emitting element.

[0035] The non-display area (NDA) may be the outer edge or outer region of any one of the display areas (DA). The non-display area (NDA) may be defined as the edge region of the main area (MA) of the display panel 100. Fan-out wiring (not shown) connecting at least one gate drive unit 210, 211, a data drive unit 200, and a timing controller 400 to the display area (DA) may be formed in the non-display area (NDA).

[0036] The sub-region SBA may extend from one side of the main region MA. The sub-region SBA may be formed from a flexible film that can be bent, folded, rolled, etc. For example, when the sub-region SBA is bent, it may overlap the main region MA in the thickness direction (Z-axis direction). The sub-region SBA may include a data drive unit 200 and a pad portion connected to the circuit board 300. Optionally, the sub-region SBA may be omitted, and the data drive unit 200 and the pad portion may be located in the non-display region NDA.

[0037] The data driver 200 can be formed as a plurality of integrated circuits (ICs) and mounted on the display panel 100 by COG (Chip on Glass), COP (Chip on Plastic), or ultrasonic bonding. For example, the data driver 200 may be located in a sub-region SBA and superimposed on the main region MA in the thickness direction (Z-axis direction) by bending the sub-region SBA. In another example, the data driver 200 can also be mounted on a circuit board 300.

[0038] The circuit board 300 can be electrically connected to the pad portion of the display panel 100 by an anisotropic conductive film (ACF). For this purpose, the lead wiring of the circuit board 300 can be electrically connected to the pad portion of the display panel 100. The circuit board 300 may be a flexible film such as a flexible printed circuit board, a printed circuit board, or a chip-on film.

[0039] On the other hand, the timing controller 400 and the data compensation processing unit (201 in Figure 3) can be mounted on the circuit board 300, respectively. Here, the timing controller 400 and the data compensation processing unit can be formed as integrated circuits (ICs) such as microprocessors. In particular, the timing controller 400 and the data compensation processing unit can also be formed as a single-chip integrated circuit (IC).

[0040] Figure 3 is a block diagram showing the electrical connection relationship between the display panel and the drive unit shown in Figures 1 and 2.

[0041] Referring to Figure 3, the display area DA has multiple pixels SP arranged in a matrix structure. In addition, both the display area DA and the non-display area NDA have multiple gate wirings GL connected to the number of pixels SP for each horizontal line, and multiple data wirings DL connected to the number of pixels SP for each vertical line.

[0042] Multiple gate wirings GL may extend in the horizontal direction (X-axis) and be spaced apart from each other in the vertical direction intersecting the horizontal direction. Multiple gate wirings GL may be arranged at regular intervals along the vertical direction.

[0043] At least one gate drive unit 210, 211, for example, the first gate driver 210, sequentially supplies gate scan signals to pixels SP for each horizontal line via gate wiring GL for each horizontal line based on a first gate drive control signal GCS1 from the timing controller 400. Multiple gate wiring GLs sequentially supply gate scan signals, which are generated sequentially at each horizontal period from the first gate drive unit 210, to pixels SP for each horizontal line.

[0044] At least one gate drive unit 210, 211, for example, a second gate driver 211, sequentially supplies light emission control scan signals to pixels SP for each horizontal line via light emission control wiring CL for each horizontal line based on a second gate drive control signal GCS2 from the timing controller 400. Multiple light emission control wirings CL sequentially supply light emission control signals, which are generated sequentially at each horizontal cycle from the second gate drive unit 211, to pixels SP for each horizontal line.

[0045] In the display area DA and the non-display area NDA, multiple data wirings DL are arranged for each vertical line, connected to the pixels SP corresponding to that vertical line. These multiple data wirings DL are electrically connected to the data drive unit 200. The data voltage determines the luminescence brightness of each of the multiple pixels SP.

[0046] The timing controller 400 receives a timing synchronization signal via an external graphics system or the like, and simultaneously receives RGB video data for each pixel SP sequentially. The timing controller 400 sequentially aligns the RGB video data for each pixel SP that is input sequentially, at least in units of one frame.

[0047] The timing controller 400 generates a data drive control signal DCS based on the timing synchronization signal to control the operation timing of the data drive unit 200. At this time, the timing controller 400 aligns the RGB video data input from an external graphics system such as a graphics card in units of at least one frame to match the resolution of the display panel 100 and supplies it to the data compensation processing unit 201. Furthermore, the timing controller 400 supplies the data drive control signal DCS to the data drive unit 200 to control the operation timing of the data drive unit 200. In addition, the timing controller 400 generates first and second gate drive control signals GCS1 and GCS2 and supplies them to the first and second gate drive units 210 and 211 to control the operation timing of each of the first and second gate drive units 210 and 211.

[0048] The Data Correction Processor (DPC) 201 sequentially stores video data MDATA, which is aligned at least one frame at a time from the Timing Controller 400, and calculates the average power consumption for at least one frame of video data in a preset period of at least one frame. For example, the DPC 201 can sequentially store video data in 10-frame periods, and calculate the power consumption for video data in 10-frame periods and the average power consumption for video data in 10-frame periods.

[0049] The data compensation processing unit 201 compares the average power consumption calculated in a preset unit of at least one frame period with a preset reference power consumption for each product, and selects a gamma compensation curve and luminance modulation data corresponding to the difference in power consumption. Then, it extracts a grayscale compensation threshold based on the luminance modulation data and corrects the grayscale value of the video data for each frame using the grayscale compensation threshold.

[0050] The data compensation processing unit 201 can sequentially supply the data drive unit 200 with corrected video data for each frame, corrected using grayscale-specific compensation thresholds, in units of at least one horizontal line. At this time, the timing controller 400 generates a data drive control signal DCS to control the data voltage output timing of the data drive integrated circuit included in the data drive unit 200. As a result, the data drive unit 200 generates an analog data voltage corresponding to the grayscale value of the corrected video data FDATA for each frame, and supplies the data voltage to each pixel SP in accordance with the control of the data voltage output timing of the timing controller 400.

[0051] Figure 4 is an equivalent circuit diagram of one embodiment for a single pixel of the display panel shown in Figure 3.

[0052] Referring to Figure 4, each pixel SP may include two transistors STR, DTR for causing the light-emitting element LE to emit light, one storage capacitor CST, and a compensation transistor CTR for transmitting the pixel drive voltage supplied to the light-emitting element LE to the voltage detection wiring VDL.

[0053] The drive transistor DTR adjusts the amount of current flowing from the first power line VDD, to the light-emitting element LE, to which a first power supply voltage corresponding to the voltage difference between the gate electrode and the source electrode is supplied. The gate electrode of the drive transistor DTR may be connected to the first electrode of transistor STR, the first electrode of which is connected to the first power line VDD to which the first power supply voltage is applied, and the second electrode of which may be connected to the first electrode of the light-emitting element LE.

[0054] Transistor STR is turned on by a gate scan signal from gate wiring GL and supplies the data voltage from data wiring DL to the gate electrode of drive transistor DTR. The gate electrode of transistor STR may be connected to either gate wiring GL, with the first electrode connected to data wiring DL and the second electrode connected to the gate electrode of drive transistor DTR.

[0055] A storage capacitor CST may be formed between the gate electrode and the second electrode of the drive transistor DTR. The storage capacitor CST stores the differential voltage between the gate voltage and the source or drain voltage of the drive transistor DTR.

[0056] The compensation transistor CTR is turned on by the compensation gate scan signal of the compensation gate wiring CL, electrically connecting the first electrode of the light-emitting element LE to one of the voltage detection wirings VDL. The pixel drive voltage can be supplied to the data drive unit 200 via the voltage detection wiring VDL.

[0057] The transistors STR, DTR, and CTR can be formed as thin-film transistors. Furthermore, while Figure 4 primarily describes the transistors STR, DTR, and CTR as N-type MOSFETs (Metal Oxide Semiconductor Field Effect Transistors), this is not the only possible configuration. For example, the transistors STR, DTR, and CTR could be formed as P-type MOSFETs, or some could be N-type MOSFETs and others as P-type MOSFETs.

[0058] Figure 5 is a block diagram of one embodiment that specifically shows the data compensation processing unit shown in Figure 3.

[0059] Referring to Figure 5, the data compensation processing unit 201 includes a frame data alignment unit 221, a power consumption comparison and analysis unit 222, a brightness modulation data selection unit 223, a compensation threshold storage unit 224, a frame data correction unit 225, and a correction data output unit 226.

[0060] The frame data alignment unit 221 sequentially aligns and stores the video data MDATA that is sequentially input from the timing controller 400 in units of at least one frame period, which are set in advance. For example, the frame data alignment unit 221 can align the video data MDATA that is sequentially input from the timing controller 400 in units of pre-set frame periods such as 60, 120, 180, 240, ... 6000 frames and store them in internal memory or external memory.

[0061] The power consumption comparison and analysis unit 222 calculates the average power consumption for each frame of video data stored in the internal memory or external memory, etc., in pre-set frame period units, via the frame data alignment unit 221. It then compares and analyzes the average power consumption calculated for at least one frame period unit with the power consumption for each standard period unit, which is pre-set for each product.

[0062] As an example, the power consumption comparison and analysis unit 222 can calculate the average power consumption per frame for video data stored during a preset period such as 60, 120, 180, 240, ... 6000 frames, and the average power consumption for video data stored during that period.

[0063] The power consumption comparison and analysis unit 222 can calculate the difference in power consumption between a preset standard period of power consumption and the power consumption per frame calculated during the video display period, or the difference in power consumption between a preset standard period of power consumption and the average power consumption, either in real time or on a preset period basis. Here, the difference in power consumption can be transmitted to the brightness modulation data selection unit 223.

[0064] The pre-set power consumption per reference period is a power consumption reference value set in advance through inspection and evaluation processes before commercialization, and includes the power consumption per display period at the maximum brightness of the display panel 100. As an example, the pre-set power consumption per reference period includes the power consumption for at least one frame period during which the display panel 100 of the product displays an image at maximum brightness. Therefore, the power consumption per reference period may include the power consumption for each pre-set frame period (e.g., 60, 120, 180, 240, ... 6000 frame periods, etc.) during which an image at maximum brightness is displayed.

[0065] The luminance modulation data selection unit 223 selects a gamma compensation curve and luminance modulation data corresponding to the power consumption per frame calculated during the video display period relative to a preset reference period power consumption, or the difference in power consumption between the average power consumption and the preset reference period power consumption. Then, it extracts the grayscale compensation thresholds based on the selected luminance modulation data from the compensation threshold storage unit 224 and outputs them to the frame data correction unit 225.

[0066] The frame data correction unit 225 receives gradation-specific compensation thresholds based on luminance modulation data from the luminance modulation data selection unit 223. The frame data correction unit 225 then corrects the gradation values ​​of the video data for each frame stored in the frame data alignment unit 221 using the gradation-specific compensation thresholds supplied from the luminance modulation data selection unit 223 to generate corrected video data for each frame.

[0067] For example, the frame data correction unit 225 calculates a grayscale compensation threshold for each frame's grayscale value using a pre-set calculation formula (e.g., addition or multiplication) and corrects the grayscale value of the video data for each frame. The frame data correction unit 225 then sequentially supplies the corrected video data for each frame, whose grayscale values ​​have been corrected, to the correction data output unit 226.

[0068] The correction data output unit 226 sequentially stores the corrected video data from the frame data correction unit 225 in units of at least one frame, and sequentially supplies the corrected video data to the data drive unit 200 in units of at least one horizontal line using line memory, buffers, etc.

[0069] Figure 6 is a flowchart showing the video data compensation processing process and video display process sequentially according to one embodiment of the present invention.

[0070] Referring to Figures 5 and 6, the frame data alignment unit 221 of the data compensation processing unit 201 sequentially aligns the video data MDATA input from the timing controller 400 in units of horizontal lines or frames, at least one frame at a time, and stores it in internal memory or external memory. As an example, the frame data alignment unit 221 can align the video data MDATA from the timing controller 400 in preset frame period units such as 60, 120, 180, 240, 300, 360, 420, 480, 540, 600...6000 frames and store it in memory (SS1).

[0071] The power consumption comparison and analysis unit 222 calculates the average power consumption for each frame of video data stored in the internal memory or external memory in pre-set frame period units. Specifically, the power consumption comparison and analysis unit 222 calculates the maximum and minimum gradation value frequencies and the average gradation value for each frame of video data stored during pre-set periods such as 60, 120, 180, 240, 300, 360, 420, 480, 540, 600...6000 frame periods. Then, it derives the power consumption corresponding to the calculated maximum and minimum gradation value frequencies and average gradation value using a pre-set calculation formula or lookup table. At this time, the power consumption comparison and analysis unit 222 can calculate the power consumption for at least one frame, or it can calculate the power consumption for video data of frames for each pre-set reference period (for example, stored video data for each frame).

[0072] The power consumption comparison and analysis unit 222 compares and analyzes the average power consumption calculated for at least one frame period with the power consumption for each product set in advance for each reference period, and calculates the power difference between the power consumption for each frame calculated in real time and the power consumption for each frame set in advance for each reference period, or the average power consumption and the power consumption for each reference period set in advance for each reference period. The result of the power difference calculation is transmitted to the luminance modulation data selection unit 223 (SS2).

[0073] Figure 7 is a graph illustrating the luminance modulation data selection method of the luminance modulation data selection unit shown in Figure 5.

[0074] Referring to Figure 7, the luminance modulation data selection unit 223 either maintains and selects a preset current reference gamma compensation curve, for example, the nth gamma compensation curve GCn, according to the difference in power calculated from the power consumption comparison analysis unit 222, or selects one of several gamma compensation curves GC1 to GC4 in which the maximum luminance value is variable to a lower value. Then, it extracts a grayscale compensation threshold for at least one of the selected gamma compensation curves GC1 to GCn from the compensation threshold storage unit 224.

[0075] The luminance modulation data selection unit 223 selects a reference gamma compensation curve (e.g., the nth gamma compensation curve GCn) or maintains the reference gamma compensation curve if the differential power is calculated to be within or maintained within one of the preset reference power values. If the differential power is maintained at or below the reference value, the luminance modulation data selection unit 223 extracts the reference gamma compensation curve (e.g., the nth gamma compensation curve GCn) and the corresponding luminance modulation data and grayscale compensation thresholds from the compensation threshold storage unit 224 and outputs them to the frame data correction unit 225.

[0076] The frame data correction unit 225 receives a reference gamma compensation curve and grayscale compensation thresholds based on the luminance modulation data from the luminance modulation data selection unit 223. The frame data correction unit 225 then corrects the grayscale values ​​of the video data for each frame stored in the frame data alignment unit 221 using the grayscale compensation thresholds supplied by the luminance modulation data selection unit 223 to generate corrected video data for each frame.

[0077] The correction data output unit 226 sequentially stores the corrected video data from the frame data correction unit 225 in units of at least one frame, and sequentially supplies the corrected video data to the data drive unit 200 in units of at least one horizontal line using line memory, buffers, etc.

[0078] In contrast, the luminance modulation data selection unit 223 selects one of several first to fourth gamma compensation curves GC1 to GC4, which are set by a grayscale compensation threshold that lowers the maximum luminance value and gamma compensation voltage value as the differential power amount is greater than or progressively greater than a preset reference power amount for each step.

[0079] For example, if the differential power becomes one step greater than a preset reference power, the fourth gamma compensation curve GC4 is selected, which is set with a grayscale-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value by one step.

[0080] Furthermore, if the differential power becomes two steps greater than the preset reference power, the third gamma compensation curve GC3, which is set with a grayscale-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value by two steps, is selected.

[0081] Furthermore, if the differential power becomes three steps larger than the preset reference power, the system selects the second gamma compensation curve GC2, which is set using a grayscale-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value by three steps.

[0082] Furthermore, if the differential power amount becomes four steps larger than the preset reference power amount, the first gamma compensation curve GC1, which is set with a grayscale-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value by four steps, is selected.

[0083] Figure 8 is an example table showing the compensation thresholds for each gradation of luminance modulation data stored in the compensation threshold memory unit of Figure 5.

[0084] Referring to Figures 7 and 8, the gradation-specific gamma compensation voltage values ​​and the gradation-specific compensation threshold values, which include the gradation-specific gamma compensation voltage values, can be preset to be variably higher or lower depending on the maximum luminance value and curvature for each gamma compensation curve GC1 to GCn.

[0085] The maximum luminance value is set to differ for each gamma compensation curve GC1 to GCn, and the luminance modulation data for each tone according to each gamma compensation curve GC1 to GCn is set to have a different compensation threshold, although the compensation threshold can be set to change in steps within the range of 0.0 to 5.0.

[0086] The luminance modulation data selection unit 223 extracts one of the selected gamma compensation curves GC1 to GCn and a grayscale compensation threshold based on the luminance modulation data from the compensation threshold storage unit 224 and outputs it to the frame data correction unit 225 (SS3).

[0087] The frame data correction unit 225 receives gradation-specific compensation thresholds based on luminance modulation data from the luminance modulation data selection unit 223. The frame data correction unit 225 then corrects the gradation values ​​of the video data for each frame stored in the frame data alignment unit 221 using the gradation-specific compensation thresholds supplied from the luminance modulation data selection unit 223 to generate corrected video data for each frame.

[0088] As an example, the frame data correction unit 225 calculates a grayscale compensation threshold for the grayscale value of the video data for each frame using a preset calculation formula (for example, addition or multiplication), and corrects the grayscale value of the video data for each frame. The frame data correction unit 225 sequentially supplies the corrected video data for each frame, whose grayscale value has been corrected, to the correction data output unit 226 (SS4).

[0089] The correction data output unit 226 sequentially stores the corrected video data from the frame data correction unit 225 in units of at least one frame, and sequentially supplies the corrected video data to the data drive unit 200 in units of at least one horizontal line using line memory, buffers, etc. (SS5).

[0090] The timing controller 400 generates a data drive control signal DCS to control the data voltage output timing of the data drive integrated circuit included in the data drive unit 200. As a result, the data drive unit 200 generates an analog data voltage corresponding to the grayscale value of the corrected video data FDATA for each frame, and supplies the data voltage to each pixel SP in accordance with the control of the data voltage output timing of the timing controller 400 (SS6).

[0091] As described above, the timing controller 400 and data compensation processing unit 201 according to one embodiment adjust the brightness and luminance of the displayed image by referring to the amount of power consumed during the image display period. The timing controller 400 and data compensation processing unit 201 correct the luminance value of the image data by referring to the amount of power consumed during the period in which the image is actually displayed, such as during the inspection period, and display it as an image, thereby further improving the display quality such as brightness and luminance for images that have the characteristic of low power consumption.

[0092] The display device 10 according to one embodiment can be applied to various electronic devices. An electronic device according to one embodiment includes the display device 10 described above, and may further include modules or devices having other additional functions in addition to the display device 10.

[0093] Figure 9 is a block diagram of an electronic device according to one embodiment.

[0094] Referring to Figure 9, an electronic device 110 according to one embodiment may consist of a display device 10, or may include a display module 11 containing the display device 10, a processor 12, a memory 13, and a power module 14.

[0095] Specifically, the processor 12 may include at least one of the following: a central processing unit (CPU), an application processor (AP), a graphics processing unit (GPU), a communication processor (CP), an image signal processor (ISP), and a controller. In one embodiment, the processor 12 may be provided divided into two or more components from a functional or structural standpoint. For example, the processor 12 may include a main processor in the form of a first drive chip, which includes a central processing unit, and an auxiliary processor in the form of a second drive chip, which includes a controller that receives video signals from the main processor and processes the video signals to conform to the interface specifications of the display module 11.

[0096] Memory 13 may include at least one of non-volatile memory and volatile memory. Memory 13 may store data information necessary for the operation of the processor 12 and the display module 11. When the processor 12 executes an application stored in memory 13, video data signals and / or input control signals are transmitted to the display module 11, and the display module 11 can process the provided signals and output video information via the display screen.

[0097] The power module 14 may include a power supply module such as a power adapter or battery device, and a power conversion module that converts the power supplied by the power supply module to generate the power necessary for the operation of the electronic device 110. The power conversion by the power conversion module may include, but is not limited to, DC-DC conversion, AC-DC conversion, and DC-AC conversion. As another example, the power module 14 may be installed in a display device and supply power to a processor 12 and memory 13 installed in an electronic device 110 that is not a display device, and is not limited to the above example.

[0098] At least one of the components of the electronic device 110 described above may be included in the display device 10 according to the embodiment described above. Furthermore, some of the individual modules functionally contained within a single module may be included in the display device 10, while others may be provided separately from the display device 10. For example, the display device 10 may include a display module 11, while the processor 12, memory 13, and power supply module 14 may be provided in the form of other devices within the electronic device 110 that are not part of the display device 10.

[0099] Figure 10 is a schematic diagram of an electronic device according to various embodiments.

[0100] Referring to Figure 10, various electronic devices 110 to which the display device 10 according to the embodiment is applied may include not only electronic devices for displaying images such as smartphones 110_1a, tablet PCs 110_1b, laptops 110_1c, televisions 110_1d, and desktop monitors 110_1e, but also wearable electronic devices including display modules such as smart glasses 110_2a, head-mounted displays 110_2b, and smartwatches 110_2c, and vehicle electronic devices 110_3 including display modules such as CID (Center Information Display) and rearview mirror displays located on the instrument panel, center fascia, and dashboard of an automobile.

[0101] The electronic device 110 in Figure 10 may include the configuration shown in Figure 1. For example, the smartphone 110_1a may include the display device 10, processor 12, memory 13, and power supply module 14 shown in Figure 1. The smartphone 110_1a may further include a communication module and a battery device. Power supplied from the battery device can be converted via the power supply module 14 and supplied to the processor 12, memory 13, and display device 10. In one embodiment, the display device 10 applied to the smartphone 110_1a may further include the power supply module 14. The processor 12 and memory 13 may be provided in the form of chips mounted on a motherboard, which is an external device, but are not limited thereto.

[0102] Although embodiments of the present invention have been described above with reference to the attached drawings, any person with ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without altering its technical idea or essential features. Therefore, the above embodiments are illustrative in all respects and should not be interpreted as limiting. [Explanation of symbols]

[0103] 10 Display device 100 Display Panels 200 Data Drive Unit 201 Data Compensation Processing Unit 210 First gate drive unit 211 Second gate drive unit 221 Frame data alignment section 222 Power consumption comparison analysis section 223 Brightness Modulation Data Selection Section 224 Compensation threshold storage unit

Claims

1. A display panel that displays images by arranging multiple pixels in a display area, A gate drive unit that drives the gate wiring of the display area, A data drive unit that drives the data wiring of the display area, A timing controller that aligns the input video data to match the resolution of the display area and controls the drive timing of the gate drive unit and the data drive unit, The system includes a data compensation processing unit that calculates the average power consumption for at least one frame of video data in a preset period of at least one frame, and corrects the input video data using brightness modulation data corresponding to the average power consumption. The data compensation processing unit sequentially supplies the data drive unit with corrected video data for each frame, which has been corrected using the luminance modulation data.

2. The aforementioned data compensation processing unit The system sequentially stores video data for each frame in pre-set intervals of at least one frame, and calculates the average power consumption for the stored video data for each frame. The calculated average power consumption is compared with a preset reference power consumption for each product, and a gamma compensation curve and brightness modulation data corresponding to the difference in power consumption are selected. A grayscale compensation threshold is extracted based on the brightness modulation data, and the grayscale value of the video data for each frame is corrected using the grayscale compensation threshold. The display device according to claim 1, wherein the corrected video data for each frame that has undergone correction processing is sequentially supplied to the data drive unit in units of at least one horizontal line.

3. The aforementioned data compensation processing unit A frame data alignment unit sequentially arranges and stores video data input sequentially from the timing controller in units of at least one frame period, The display device according to claim 1, further comprising a power consumption comparison and analysis unit that calculates the average power consumption for each frame of video data stored in the frame data alignment unit, and compares and analyzes the average power consumption calculated for at least one frame period with a predetermined standard period of power consumption for each product.

4. The aforementioned power consumption comparison and analysis unit is The maximum and minimum gradation value frequencies and the average gradation value for each frame of video data stored during the aforementioned predetermined period are analyzed. The display device according to claim 3, wherein the power consumption corresponding to the maximum and minimum grayscale value frequencies and the average grayscale value is calculated using a preset calculation formula or lookup table.

5. The aforementioned power consumption comparison and analysis unit is The aforementioned power consumption is calculated at least for each frame, or for each predetermined reference period. The difference in power consumption between the aforementioned power consumption and the power consumption for each reference period is calculated in real time or in pre-set period units. The display device according to claim 4, wherein the power consumption for each reference period includes the power consumption for at least one frame period during which the display panel displays an image at maximum brightness.

6. The aforementioned data compensation processing unit A luminance modulation data selection unit selects a gamma compensation curve and luminance modulation data corresponding to the difference in power consumption between the power consumption for each reference period and the average power consumption calculated during the video display period, and extracts and outputs grayscale compensation thresholds based on the luminance modulation data from a compensation threshold storage unit. A frame data correction unit generates corrected video data for each frame by correcting the gradation values ​​of the video data for each frame stored in the frame data alignment unit using gradation-specific compensation thresholds extracted from the luminance modulation data selection unit, The display device according to claim 3, further comprising a correction data output unit that sequentially supplies the correction video data for each frame to the data drive unit in units of at least one horizontal line.

7. The luminance modulation data selection unit is, If the differential power is calculated to be within or maintained within one of the preset reference power amounts, select the reference gamma compensation curve or maintain the reference gamma compensation curve. The display device according to claim 6, wherein the display device selects one of a plurality of gamma compensation curves set by a gradation-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value as the differential power amount is greater than or progressively greater than one of the reference power amounts set in advance for each step.

8. The aforementioned grayscale compensation threshold is, The display device according to claim 7, wherein the maximum brightness value is preset in the compensation threshold storage unit to be variably higher or lower according to the curvature of each of the first to n gamma compensation curves, each of which is different.

9. The frame data correction unit, The grayscale values ​​of the video data for each frame are corrected by calculating the grayscale compensation thresholds using a predetermined calculation formula, with respect to the grayscale values ​​of the video data for each frame. The display device according to claim 7, wherein the corrected video data for each frame, whose gradation values ​​have been corrected, is sequentially supplied to the corrected data output unit.

10. A display panel that displays images by arranging multiple pixels in a display area, A gate drive unit that drives the gate wiring of the display area, A data drive unit that drives the data wiring of the display area, A timing controller that aligns the input video data to match the resolution of the display area and controls the drive timing of the gate drive unit and the data drive unit, Includes a data compensation processing unit that calculates the average power consumption for at least one frame of video data and corrects the input video data according to the average power consumption, The aforementioned data compensation processing unit The average power consumption is calculated for each frame of video data in a predetermined period of at least one frame, and brightness modulation data is selected according to the difference between the calculated average power consumption and the reference power consumption. A display device that corrects the gradation values ​​of the video data for each frame using the luminance modulation data, and sequentially supplies the corrected video data for each frame to the data drive unit.

11. The aforementioned data compensation processing unit A frame data alignment unit sequentially arranges and stores video data input sequentially from the timing controller in units of at least one frame period, The display device according to claim 10, further comprising a power consumption comparison and analysis unit that calculates the average power consumption for each frame of video data stored in the frame data alignment unit, and compares and analyzes the average power consumption calculated for at least one frame period with a predetermined standard period of power consumption for each product.

12. The aforementioned power consumption comparison and analysis unit is The maximum and minimum gradation value frequencies and the average gradation value for each frame of video data stored during the aforementioned predetermined period are analyzed. The display device according to claim 11, wherein the power consumption corresponding to the maximum and minimum grayscale value frequencies and the average grayscale value is calculated using a preset calculation formula or lookup table.

13. The aforementioned data compensation processing unit A luminance modulation data selection unit selects a gamma compensation curve and luminance modulation data corresponding to the difference in power consumption between the power consumption for each reference period and the average power consumption calculated during the video display period, and extracts and outputs grayscale compensation thresholds based on the luminance modulation data from a compensation threshold storage unit. A frame data correction unit generates corrected video data for each frame by correcting the gradation values ​​of the video data for each frame stored in the frame data alignment unit using gradation-specific compensation thresholds extracted from the luminance modulation data selection unit. The display device according to claim 11, further comprising a correction data output unit that sequentially supplies the correction video data for each frame to the data drive unit in units of at least one horizontal line.

14. The luminance modulation data selection unit is, If the aforementioned differential power is calculated to be within or maintained within one of the preset reference power amounts, select the reference gamma compensation curve or maintain the reference gamma compensation curve. The display device according to claim 13, wherein the display device selects one of a plurality of gamma compensation curves set by a gradation-specific compensation threshold that lowers the maximum brightness value and gamma compensation voltage value as the differential power amount is greater than or progressively greater than one of the reference power amounts set in advance for each step.

15. The frame data correction unit, The grayscale compensation threshold is calculated for the grayscale value of the video data for each frame using a predetermined calculation formula to correct the grayscale value of the video data for each frame. The display device according to claim 13, wherein the corrected video data for each frame, whose gradation values ​​have been corrected, is sequentially supplied to the corrected data output unit.

16. In an electronic device including a display device, The aforementioned display device is A display panel that displays images by arranging multiple pixels in a display area, A gate drive unit that drives the gate wiring of the display area, A data drive unit that drives the data wiring of the display area, A timing controller that aligns the input video data to match the resolution of the display area and controls the drive timing of the gate drive unit and the data drive unit, The system includes a data compensation processing unit that calculates the average power consumption for at least one frame of video data in a preset period of at least one frame, and corrects the input video data using brightness modulation data corresponding to the average power consumption. The data compensation processing unit is an electronic device that sequentially supplies corrected video data for each frame, which has been corrected using the luminance modulation data, to the data drive unit.

17. The aforementioned data compensation processing unit The system sequentially stores video data for each frame in pre-set intervals of at least one frame, and calculates the average power consumption for the stored video data for each frame. The calculated average power consumption is compared with a preset reference power consumption for each product, and a gamma compensation curve and brightness modulation data corresponding to the difference in power consumption are selected. A grayscale compensation threshold is extracted based on the brightness modulation data, and the grayscale value of the video data for each frame is corrected using the grayscale compensation threshold. The electronic device according to claim 16, wherein the corrected video data for each frame that has undergone correction processing is sequentially supplied to the data drive unit in units of at least one horizontal line.

18. The aforementioned data compensation processing unit A frame data alignment unit sequentially arranges and stores video data input sequentially from the timing controller in units of at least one frame period, The electronic device according to claim 16, further comprising a power consumption comparison and analysis unit that calculates the average power consumption for each frame of video data stored in the frame data alignment unit, and compares and analyzes the average power consumption calculated for at least one frame period with a predetermined standard period of power consumption for each product.

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