Display device, analysis device thereof, and control method for analysis device

Abstract

This analysis device comprises a communication unit for communicating with a display device, and a sensor for acquiring an image displayed on the display device, wherein: a plurality of response times respectively corresponding to times at which a plurality of first gray values are changed to a plurality of second gray values are recognized on the basis of first and second images acquired by the sensor; information corresponding to correction of an overdrive table of the display device is recognized on the basis of the difference between the plurality of response times and a reference response time, and the overdrive table of the display device is corrected by controlling the communication unit to transmit the recognized information to the display device. Each of the first and second images includes a plurality of gray values, and the gray values of the first and second images are different from each other.

Description

Display device, its analysis device, and method of controlling the analysis device

[0001] The disclosed invention relates to a display device for optimizing response speed, an analysis device thereof, and a control method for the analysis device.

[0002] Display devices are devices that display visual and three-dimensional image information, and include Liquid Crystal Display Devices (LCDs), Electro-Luminescence Display Devices (ELDs), Field Emission Display Devices (FEDs), Plasma Display Panels (PDPs), Thin Film Liquid Crystal Displays (TFT-LCDs), and Flexible Display Devices.

[0003] A liquid crystal display device is one of the most widely used flat panel display devices currently, and comprises two substrates with electrodes provided inside two glass plates attached by a sealant, and a liquid crystal provided between the two substrates.

[0004] A liquid crystal display device is a device that displays an image by applying voltage to electrodes provided on two substrates to generate an electric field and determining the orientation of liquid crystal molecules through the electric field to control the polarization of incident light.

[0005] Such liquid crystal display devices must increase the response time of the liquid crystal to improve the quality of the output image.

[0006] Recently, overdrive technology is being used to increase the response speed of liquid crystals in liquid crystal display devices.

[0007] Overdrive technology accelerates the state transition of brightness by making the voltage applied to the electrode higher or lower than the target voltage, and this technology can improve the response speed in grayscale.

[0008] Current overdrive technology has a problem in that it causes at least one of afterimages, inverse afterimages, or color distortion in the image. Accordingly, there is a demand for overdrive technologies that can prevent afterimages, inverse afterimages, or color distortion while satisfying response speeds within the standard response speed range.

[0009] One aspect of the disclosed invention provides a display device that corrects an overdrive table based on at least one of the response speed of a liquid crystal and image quality information, an analysis device thereof, and a control method of the analysis device.

[0010] Another aspect of the disclosed invention provides a display device that corrects an overdrive table based on image quality information of the display device obtained by a user device, an analysis device thereof, and a control method of the analysis device.

[0011] An analysis device according to one aspect comprises: a communication unit that communicates with a display device; a sensor that acquires an image of a test image displayed on the display device; and a control unit that controls the communication unit to transmit the recognized information to the display device in order to correct the overdrive table of the display device based on the difference between the recognized multiple response times and a reference response time, and the first image of a first test image acquired by the sensor and the second image of a second test image acquired by the sensor, each corresponding to the time when a plurality of first gray values ​​change to a plurality of second gray values. The first image includes a plurality of first gray values ​​displayed on the display device, and the second image includes a plurality of second gray values ​​displayed on the display device, and each of the plurality of second gray values ​​of the second image corresponds to a plurality of first gray values, but is a different value.

[0012] The control unit recognizes identification information of the display device, recognizes the original overdrive table of the display device based on the recognized identification information of the display device, and applies information corresponding to the correction to correct the recognized original overdrive table.

[0013] The control unit further includes recognizing at least one response time that exceeds a reference response time among a plurality of recognized response times, recognizing a first gray value among a plurality of first gray values ​​corresponding to the at least one recognized response time and a second gray value among a plurality of second gray values, recognizing a setting voltage corresponding to the first gray value and the recognized second gray value recognized in the original overdrive table, correcting the original overdrive table by increasing the recognized setting voltage by a first voltage based on the fact that the recognized first gray value is smaller than the recognized second gray value, and correcting the original overdrive table by decreasing the setting voltage by a second voltage based on the fact that the recognized first gray value is larger than the recognized second gray value.

[0014] The analysis device may further include an input unit. The control unit further includes receiving a reference response time from the input unit.

[0015] The control unit further includes recognizing an average response time for a plurality of recognized response times and recognizing a reference response time based on the recognized average response time.

[0016] The sensor includes a first sensor. The recognized information corresponding to the correction of the overdrive table of the display device is the recognized first information. The analysis device may further include a second sensor that acquires an image of a test image displayed on the display device. The control unit controls the communication unit to transmit the recognized first information to the display device so that a first correction of the overdrive table of the display device is performed based on the recognized first information, based on the fact that a plurality of recognized response times are less than or equal to a reference response time; recognizes the quality of the third image based on the third image of the third test image displayed on the display device acquired by the second sensor, recognizes second information corresponding to the correction of the overdrive table that has been first corrected based on the recognized quality, and controls the communication unit to transmit the recognized second information to the display device so that the overdrive table that has been first corrected is corrected based on the recognized second information.

[0017] The control unit recognizes at least one of afterimage, inverse afterimage, and discoloration based on a third image acquired by a second sensor, recognizes a block image in which at least one of afterimage, inverse afterimage, and discoloration is recognized, recognizes a gray value of the background image of the recognized block image and a gray value of the character image of the recognized block image, recognizes a set voltage corresponding to the gray value of the background image and the gray value of the character image in a first corrected override table, recognizes a ratio of at least one of afterimage, inverse afterimage, and discoloration for the character image in the block image, and recognizes second information including a correction to the set voltage of the first corrected overdrive table so that the set voltage of the first corrected overdrive table is corrected based on the recognized second information, based on the fact that the recognized ratio exceeds a reference ratio.

[0018] The sensor includes a first sensor. The recognized information corresponding to the correction of the overdrive table of the display device is the recognized first information. The communication unit may further communicate with a user device that acquires an image of a test image displayed on the display device. The control unit controls the communication unit to transmit the recognized first information to the display device so that a first correction of the overdrive table of the display device is performed based on the recognized first information, recognizes the quality of the third image based on the third image acquired by the user device, recognizes second information corresponding to the correction of the overdrive table that is first corrected based on the recognized quality, and controls the communication unit to transmit the recognized second information to the display device so that the overdrive table that is first corrected is corrected based on the recognized second information.

[0019] A display device comprises: a communication unit that communicates with an external device; a liquid crystal unit in which the arrangement of liquid crystal molecules is changed by a voltage applied to an electrode unit, and a display panel that displays a gray image having at least one gray value among a plurality of gray values ​​by changing the arrangement of liquid crystal molecules; a memory that stores an overdrive table including a target voltage corresponding to each of the plurality of gray values ​​and a plurality of setting voltages for changing from a first gray value to a second gray value for each of the plurality of gray values; and based on the change of the gray value of an image displayed through the display panel, a first gray value among the plurality of gray values ​​and a second gray value changed from the first gray value are recognized, a target voltage corresponding to the second gray value is recognized, a setting voltage corresponding to the first gray value and the second gray value recognized from the overdrive table is recognized, and a setting voltage is controlled to be applied to the electrode unit, and a target voltage is controlled to be applied to the electrode unit, and the overdrive table stored in the memory is corrected in response to receiving information for correcting the overdrive table from an external device.

[0020] The control unit further includes controlling a display panel to display a first image and a second image based on a command for correcting a stored overdrive table received from an external device.

[0021] The external device includes an analysis device that analyzes the response time of the liquid crystal of the display panel and analyzes the image quality of the display panel, or a user device that acquires an image of the display panel, or a combination of the analysis device and the user device.

[0022] A control method for an analysis device comprises a communication unit communicating with a display device, a sensor acquiring an image of a test image displayed on the display device, and a control unit. In this control method, the control unit recognizes identification information of the display device, recognizes an original overdrive table of the display device based on the recognized identification information of the display device, acquires a first image of a first test image displayed on the display device through the sensor, acquires a second image of a second test image displayed on the display device through the sensor, recognizes a plurality of response times when changing from a plurality of first gray values ​​to a plurality of second gray values ​​based on the acquired first image and the acquired second image, recognizes information corresponding to the correction of the original overdrive table of the display device based on the difference between the recognized multiple response times and a reference response time, and transmits the recognized information to the display device to correct the original overdrive table of the display device based on the recognized information. The first image includes a plurality of first gray values ​​displayed on a display device, and the second image includes a plurality of second gray values ​​displayed on a display device, and each of the plurality of second gray values ​​of the second image corresponds to a plurality of first gray values, but are different values.

[0023] Correcting the original overdrive table of the display device is performed by a control unit, which recognizes at least one response time that exceeds a reference response time among a plurality of recognized response times, recognizes a first gray value among a plurality of first gray values ​​corresponding to the at least one recognized response time and a second gray value among a plurality of second gray values, recognizes a setting voltage corresponding to the first gray value and the second gray value in the original overdrive table, and corrects the original overdrive table by increasing the recognized setting voltage by a first voltage based on the fact that the first gray value is smaller than the second gray value, or corrects the original overdrive table by decreasing the setting voltage by a second voltage based on the fact that the recognized first gray value is larger than the recognized second gray value.

[0024] The sensor includes a first sensor. The recognized information corresponding to the correction of the overdrive table of the display device is the recognized first information. The analysis device further includes a second sensor that acquires an image of a test image displayed on the display device. The control method of the analysis device further includes controlling a communication unit to transmit the recognized first information to the display device in order to perform a first correction of the overdrive table of the display device based on the first information recognized by the control unit based on the fact that a plurality of recognized response times are less than or equal to a reference response time, acquiring a third image of a third test image displayed on the display device through the second sensor, recognizing the image quality of the third image based on the third image, recognizing second information corresponding to the correction of the first corrected overdrive table based on the recognized image quality, and transmitting the recognized second information to the display device in order to correct the first corrected overdrive table based on the recognized second information.

[0025] Correcting a first-corrected overdrive table based on the recognized image quality includes recognizing at least one of afterimage, inverse afterimage, and color distortion based on a third image acquired by a second sensor, recognizing a block image in which at least one of afterimage, inverse afterimage, and color distortion is recognized, recognizing the gray value of the background image and the gray value of the character image of the recognized block image, recognizing a set voltage corresponding to the gray value of the background image and the gray value of the character image recognized in the first-corrected overdrive table, recognizing the ratio of at least one of afterimage, inverse afterimage, and color distortion for the character image in the block image, and recognizing second information including correction for the set voltage of the first-corrected overdrive table based on the second information recognized based on the fact that the recognized ratio exceeds a reference ratio.

[0026] According to the disclosed invention, the disclosed invention can satisfy the performance of the response speed of the liquid crystal of a display device and can improve the image quality.

[0027] The disclosed invention can automatically correct the overdrive table.

[0028] The disclosed invention can improve the quality of the output of a display device and enhance the automation performance of the display device by determining the final set voltage of an overdrive table (OD table) while repeatedly correcting the response speed of the liquid crystal.

[0029] The disclosed invention recognizes image quality information of a display device using a user device and corrects an overdrive table based on the recognized image quality information of the display device, thereby enabling the image quality of the display device to be corrected at a time desired by the user according to their needs, and consequently, the service time and service cost for improving the image quality of the display device can be reduced. Through this, the present invention can improve user satisfaction.

[0030] The disclosed invention can improve the quality and marketability of a display device, further increase user satisfaction, and secure the competitiveness of the display device.

[0031] FIG. 1 is an external view of a display device according to one embodiment.

[0032] FIG. 2 is a detailed configuration diagram of a display panel provided in a display device according to one embodiment.

[0033] FIG. 3 is an example diagram of the arrangement of liquid crystal molecules of a display device according to one embodiment.

[0034] FIG. 4 is an example diagram of overdrive control of a display device according to one embodiment.

[0035] FIG. 5 is an example diagram of an overdrive table stored in a display device according to one embodiment.

[0036] FIG. 6 is a control configuration of an analysis device for analyzing a display device according to one embodiment.

[0037] FIGS. 7 and FIGS. 8 are example diagrams of acquiring a first analysis image of an analysis device that analyzes a display device according to one embodiment.

[0038] FIGS. 9 and FIGS. 10 are example diagrams of acquiring a second analysis image of an analysis device that analyzes a display device according to one embodiment.

[0039] FIG. 11 is an example of a response time table recognized by an analysis device that analyzes a display device according to one embodiment.

[0040] FIG. 12 is an example of image quality recognition of an analysis device that analyzes a display device according to one embodiment.

[0041] FIG. 13 is another example of image quality recognition of an analysis device that analyzes a display device according to one embodiment.

[0042] FIG. 14 is a control configuration diagram of a display device according to one embodiment.

[0043] FIG. 15 is a control flowchart of an analysis device that primarily corrects the overdrive table of a display device according to one embodiment.

[0044] FIG. 16 is a control flowchart of an analysis device that secondarily corrects the overdrive table of a display device according to one embodiment.

[0045] FIG. 17 is a control configuration diagram of a display device according to another embodiment.

[0046] The various embodiments of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments.

[0047] In relation to the description of the drawings, similar reference numerals may be used for similar or related components.

[0048] The singular form of the noun corresponding to the item may include one or multiple items, unless the relevant context clearly indicates otherwise.

[0049] In this document, each of the phrases such as "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof.

[0050] The term "and / or" includes a combination of multiple related described components or any of the multiple related described components.

[0051] Terms such as "first," "second," or "first" or "second" may be used simply to distinguish a component from another component and do not limit the components in other aspects (e.g., importance or order).

[0052] Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0053] Terms such as "include" or "have" are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in this document, and do not preclude the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0054] When it is said that a component is "connected," "combined," "supported," or "in contact" with another component, this includes not only cases where the components are directly connected, combined, supported, or in contact, but also cases where they are indirectly connected, combined, supported, or in contact through a third component.

[0055] When it is said that a component is located "on" another component, this includes not only cases where one component is in contact with the other, but also cases where another component exists between the two components.

[0056] The present invention will be described in detail below with reference to the attached drawings.

[0057] FIG. 1 is an external view of a display device according to one embodiment, and will be explained with reference to FIG. 2 to 5.

[0058] FIG. 2 is a detailed configuration diagram of a display panel provided in a display device according to one embodiment, FIG. 3 is an example diagram of the arrangement of liquid crystal molecules in a display device according to one embodiment, FIG. 4 is an example diagram of overdrive control in a display device according to one embodiment, and FIG. 5 is an example diagram of an overdrive table stored in a display device according to one embodiment.

[0059] The display device (100) is a device that displays visual and three-dimensional image information, such as a display unit of a user device like a laptop, smartphone, tablet, etc., a PC monitor, a television, a display unit of a home appliance, a display unit inside a vehicle, an advertising board, an information sign, etc.

[0060] The display device (100) is a device that displays an image received from an external device or displays an image stored in the display device (100). The external device may include a set-top box, external memory, a laptop, or a user device.

[0061] A television will be used as an example to describe the display device of this embodiment.

[0062] The display device (100) may include a main body (100a) that forms the exterior of the display device (100).

[0063] The display device (100) may further include a bezel (100b) provided on the edge of the main body (100a). The display device (100) may be protected from external forces due to the bezel (100b).

[0064] The display device (100) may also be implemented in a bezel-less form.

[0065] The display device (100) may further include a stand provided at the bottom of the main body (100a) to support the main body (100a) in accordance with the installation environment and function, or may further include a bracket provided at the rear of the main body (100a) to allow the main body (100a) to be mounted on a wall or the like.

[0066] As illustrated in FIG. 2, the display device (100) may further include a case (100c) that is coupled with a bezel (100a) and positioned at the rear to form the rear appearance. The display device (100) may include a backlight unit (110) and a display panel (120) positioned between the bezel (100a) and the case (100c).

[0067] The display panel (120) can display an image using light from the backlight unit (110).

[0068] The display device (100) may be a liquid crystal display device. The liquid crystal display device of the present embodiment may be a liquid crystal display device in a vertical alignment (VA) mode. A liquid crystal display device in a vertical alignment mode may be a liquid crystal display device in which the long axis of the liquid crystal molecules is vertically aligned between two substrates when no electric field is applied.

[0069] The backlight unit (110) of the display device (100) can be classified into a direct type backlight unit and an edge type backlight unit depending on the placement position.

[0070] The display device (100) may also further include a touch panel (not shown) provided in front of the display panel (120).

[0071] The configuration of the display panel (120) is explained in more detail.

[0072] The display panel (120) includes a liquid crystal panel (120a), a first polarizing panel (120b) provided on one side of the liquid crystal panel (120a), and a second polarizing panel (120c) provided on the other side of the liquid crystal panel (120a).

[0073] The liquid crystal panel (120a) includes a substrate portion (121), a color filter portion (122), a first electrode portion (123), a second electrode portion (124), and a liquid crystal portion (125) formed by stacking them together.

[0074] The substrate portion (121) may include first and second substrates (121a, 121b) attached with a sealant.

[0075] The first and second substrates (121a, 121b) may be glass substrates.

[0076] The first substrate (121a) of the substrate portion (121) may be provided adjacent to the first polarizing panel (120b).

[0077] The first and second substrates (121a, 121b) of the substrate portion (121) can support the first electrode portion (123), the second electrode portion (124), and the liquid crystal portion (125) so as to maintain the position and state of the first electrode portion (123), the second electrode portion (124), and the liquid crystal portion (125).

[0078] The substrate portion (121) may include a rigid substrate, a flexible substrate or a rigid-flexible substrate, and may include a glass substrate.

[0079] When the substrate portion (121) is implemented as a flexible substrate, the display device (100) can be curved with a certain curvature.

[0080] The color filter section (122) may be positioned adjacent to the second polarizing panel (120c) or the second substrate (121b).

[0081] The color filter section (122) can be positioned adjacent to the first electrode section (123).

[0082] The color filter section (122) converts the incident light into red light, green light, and blue light, and causes the converted light to be emitted.

[0083] The color filter section (122) may include a red filter (R, 122a) that converts incident light into red light, a green filter (G, 122b) that converts incident light into green light, and a blue filter (B, 122c) that converts incident light into blue light.

[0084] Here, the red filter (122a), green filter (122b), and blue filter (122c) are placed adjacent to each other and form a single RGB filter. And a single RGB filter can form a single pixel.

[0085] The color filter section (122) can express color by emitting at least one of the red light emitted from the red filter (122a), the green light emitted from the green filter (122b), and the blue light emitted from the blue filter (122c) to the outside, or by mixing at least two of the red light emitted from the red filter (122a), the green light emitted from the green filter (122b), and the blue light emitted from the blue filter (122c) and emitting them to the outside.

[0086] The light converted in each filter of the color filter section (122) can be emitted to the outside through the second polarization panel (120c).

[0087] The first electrode part (123) can be placed between the second substrate (121b) and the liquid crystal part (125).

[0088] The first electrode part (123) can be placed between the color filter part (122) and the liquid crystal part (125).

[0089] The first electrode part (123) may be a common electrode. The first electrode part (123) may be a ground electrode. A preset reference voltage may be applied to the first electrode part (123).

[0090] The first electrode part (123) forms an electric field between itself and the second electrode part (124).

[0091] The first electrode part (123) causes the liquid crystal molecules within the liquid crystal part (125) to be oriented by an electric field formed in the liquid crystal part (125).

[0092] The second electrode (124) can be positioned adjacent to the first substrate (121a).

[0093] The second electrode portion (124) can be placed between the first substrate (121a) and the liquid crystal portion (125).

[0094] The second electrode part (124) includes a pixel electrode that forms an electric field using the electrical power of the first electrode part (123).

[0095] A pixel electrode can be provided corresponding to a pixel. A pixel electrode can be provided corresponding to an RGB filter.

[0096] The pixel electrode may include a sub-pixel electrode corresponding to a red filter, a sub-pixel electrode corresponding to a green filter, and a sub-pixel electrode corresponding to a blue filter. That is, the sub-pixel electrodes of the second electrode section (124) may be positioned to correspond to the positions of the red filter, green filter, and blue filter of the color filter section (122), respectively.

[0097] The voltage applied to the multiple sub-pixel electrodes of the second electrode part (124) may be the same or different from each other.

[0098] A voltage equal to the reference voltage or a voltage different from the reference voltage may be applied to the subpixel electrode.

[0099] For example, if the reference voltage is voltage a, a voltage between voltage b and voltage c may be applied to the second electrode. Voltage b may be smaller than voltage a, and voltage c may be larger than voltage a. And voltage a may be any one voltage between voltage b and voltage c.

[0100] An electric field can be formed in the liquid crystal portion (125) by the difference between the voltage applied to the subpixel electrode and the voltage applied to the common electrode.

[0101] The magnitude of the electric field formed in the liquid crystal portion (125) can be determined by the difference between the voltage applied to the subpixel electrode and the voltage applied to the common electrode.

[0102] Depending on the voltage applied to the subpixel electrodes, the direction of the electric field lines formed in the liquid crystal portion (125) may be determined, and an electric field may not be formed in the liquid crystal portion (125).

[0103] Multiple subpixel electrodes of the second electrode section (124) can share the first electrode section (123).

[0104] The second electrode part (124) can be provided opposite the first electrode part (123) with the liquid crystal part (125) in between.

[0105] Multiple subpixel electrodes of the second electrode section (124) can be implemented using a thin film transistor (TFT).

[0106] The liquid crystal portion (125) is disposed between the first electrode portion (123) and the second electrode portion (124) and may include a plurality of liquid crystals. Here, the liquid crystal may be a liquid crystal molecule.

[0107] Liquid crystals can be arranged randomly within the interior when no electric field is formed. When an electric field is formed, liquid crystals can be oriented according to the direction of the formed electric field.

[0108] As illustrated in FIG. 3, when an electric field is formed between the pixel electrode of the second electrode and the common electrode of the first electrode, the liquid crystal molecules of the liquid crystal portion (125) can be arranged horizontally in the region corresponding to the plane of the sub-pixel electrodes of the second electrode portion (124) among the regions of the liquid crystal portion (125), and can be arranged horizontally along the electric field lines in the region corresponding to the corner of the sub-pixel electrodes in accordance with the direction of formation of the electric field lines.

[0109] The orientation angle of liquid crystal molecules in the plane of the subpixel electrodes of the second electrode part (124) and the orientation angle of liquid crystal molecules at the corner of the subpixel electrodes of the second electrode part may be different.

[0110] When an electric field is not formed between the pixel electrode of the second electrode part (124) and the common electrode of the first electrode part, the long axis of the liquid crystal molecules of the liquid crystal part can be oriented vertically between the two substrates.

[0111] The liquid crystal molecules of the liquid crystal portion (125) can have their orientation angle adjusted in response to the voltage applied through the second electrode portion (124). The liquid crystal molecules of the liquid crystal portion (125) can be oriented closer to the horizontal as the magnitude of the voltage applied through the second electrode portion (124) increases.

[0112] That is, the orientation angle of the liquid crystal molecules of the liquid crystal portion (125) can be determined by the voltage applied to the second electrode portion (124).

[0113] The liquid crystal unit (125) can output an amount of light corresponding to the orientation angle of the liquid crystal molecules. The liquid crystal unit (125) can adjust the brightness of the image displayed through the display panel (120) by adjusting the orientation angle of the liquid crystal molecules. The liquid crystal unit (125) can adjust the brightness of the image output through each of the pixels.

[0114] Here, brightness can be gradation (also referred to as color intensity or shade). Gradation can be defined as a grayscale. This grayscale can determine the number of colors displayed on a display device.

[0115] The number of pixel brightness levels output through the liquid crystal unit (125) can be determined by an n-bit grayscale. Here, n can be a natural number.

[0116] For example, in the case of a 3-bit grayscale, it can have 8 gray values ​​ranging from black to white, and the pixels of the liquid crystal can output brightness at 8 levels.

[0117] As another example, in the case of an 8-bit grayscale, there can be 256 gray values ​​ranging from black to white, and the pixels of the liquid crystal can output brightness at 256 levels.

[0118] As another example, in the case of a 10-bit grayscale, there can be 1024 gray values ​​ranging from black to white, and the pixels of the liquid crystal can output brightness at 1024 levels.

[0119] The grayscale bits listed above are merely examples, and grayscale bits are not limited to this.

[0120] The larger the grayscale, the richer, more sophisticated, and more detailed the image a display device can display.

[0121] The display device can store a target voltage for displaying a grayscale image for each grayscale value.

[0122] The display device can also store a maximum voltage corresponding to a decrease in the gray value and a minimum voltage corresponding to an increase in the gray value for each gray value.

[0123] The display device can change the gray value of the liquid crystal portion (125) based on changing the image to be displayed. Changing the gray value of the liquid crystal portion (125) may include changing the gray value of at least one pixel.

[0124] The display device can change the target voltage applied to the liquid crystal part (125) to change the gray value of the liquid crystal part.

[0125] When the display device changes the gray value of the liquid crystal part (125), in order to increase the response speed of the liquid crystal part (125), the voltage applied to the liquid crystal part (125) is raised or lowered above the target voltage and then maintained at the target voltage.

[0126] Applying voltage to the liquid crystal portion (125) may include applying voltage to the first and second electrode portions.

[0127] Let’s explain an example where, in an 8-bit grayscale, the gray value of black is set to 0 and the gray value of white is set to 255.

[0128] For example, when the display device increases the gray value of the liquid crystal portion (125), it increases the voltage applied to the liquid crystal portion (125) by a preset voltage from the target voltage, and when the voltage applied to the liquid crystal portion (125) reaches the target voltage, it maintains the voltage applied to the liquid crystal portion (125) at the target voltage.

[0129] Another example is explained with reference to FIG. 4. When the gray value of the liquid crystal portion (125) of the display device is increased, the voltage applied to the liquid crystal portion (125) is raised to a preset voltage (Peak) higher than the target voltage, and when the voltage applied to the liquid crystal portion (125) reaches the preset voltage, the voltage applied to the liquid crystal portion (125) is lowered to a preset minimum voltage (min), and when the voltage applied to the liquid crystal portion (125) reaches the preset minimum voltage, the voltage applied to the liquid crystal portion (125) is raised to a target voltage (Target), and when the voltage applied to the liquid crystal portion (125) reaches the target voltage, the voltage applied to the liquid crystal portion (125) is maintained at the target voltage.

[0130] As another example, when the display device lowers the gray value of the liquid crystal part (125), it lowers the voltage applied to the liquid crystal part (125) by a preset voltage from the target voltage, and when the voltage applied to the liquid crystal part (125) reaches the target voltage, it maintains the voltage applied to the liquid crystal part (125) at the target voltage.

[0131] As another example, when lowering the gray value of the liquid crystal portion (125), the display device lowers the voltage applied to the liquid crystal portion (125) to a preset voltage lower than the target voltage, and when the voltage applied to the liquid crystal portion (125) reaches the preset voltage, it raises the voltage applied to the liquid crystal portion (125) to a preset maximum voltage, and when the voltage applied to the liquid crystal portion (125) reaches the preset maximum voltage, it lowers the voltage applied to the liquid crystal portion (125) to the target voltage, and when the voltage applied to the liquid crystal portion (125) reaches the target voltage, it maintains the voltage applied to the liquid crystal portion (125) at the target voltage.

[0132] As illustrated in FIG. 5, the display device may include an overdrive table that stores information about a preset voltage to be applied to the liquid crystal portion (125) in response to a change in the gray value. Hereinafter, the preset voltage may be a peak voltage. The preset voltage will be described as the set voltage.

[0133] The overdrive table can store the setting voltage for the gray value to be changed for each gray value.

[0134] For example, the horizontal axis of the Overdrive Table can be the initial gray value during rising overdrive control and the changing gray value during falling overdrive control. The vertical axis of the Overdrive Table can be the changing gray value during rising overdrive control and the initial gray value during falling overdrive control.

[0135] The overdrive table can be stored within the display device after being corrected by an analysis device during the manufacturing of the display device.

[0136] The overdrive table may also be stored back within the display device after being calibrated by the user device based on user requirements following the manufacture of the display device.

[0137] FIG. 6 is a control configuration diagram of an analysis device for analyzing a display device according to one embodiment, which will be explained with reference to FIGS. 7 to 13.

[0138] FIGS. 7 and 8 are example diagrams of acquiring a first analysis image of an analysis device for analyzing a display device according to one embodiment, and FIGS. 9 and 10 are example diagrams of acquiring a second analysis image of an analysis device for analyzing a display device according to one embodiment.

[0139] FIG. 11 is an example of a response time table recognized by an analysis device analyzing a display device according to one embodiment, FIG. 12 is an example of image quality recognition by an analysis device analyzing a display device according to one embodiment, and FIG. 13 is another example of image quality recognition by an analysis device analyzing a display device according to one embodiment.

[0140] The analysis device (200) analyzes the response speed of the liquid crystal provided in the display device (100) and the image quality of the image displayed in the display device (100), and corrects the overdrive table based on at least one of the analyzed response speed of the liquid crystal and the image quality.

[0141] Response speed is also called response time.

[0142] The analysis device (200) may include a first image sensor (210), a second image sensor (220), a first communication unit (230), and a first control unit (240), and may further include a first input unit (250) and a display unit (260).

[0143] To distinguish between the components of the analysis device and the components of the display device, 'first' is indicated on some components of the analysis device that have the same name as the components of the display device.

[0144] The first image sensor (210) can acquire a first test image displayed on the display device (100) as a first analysis image.

[0145] The first analysis image may be an image for analyzing the response speed of the liquid crystal of a display device.

[0146] The first test video may be a video for testing the response speed of the liquid crystal of a display device.

[0147] The first analysis image and the first test image may be multiple gray images having different gray values. In order to distinguish between the multiple gray images displayed on the display device (100) and the multiple gray images obtained from the first image sensor (210), the multiple gray images displayed on the display device (100) are described as the first test image, and the multiple gray images obtained from the first image sensor (210) of the analysis device are described as the first analysis image.

[0148] The first image sensor (210) can sequentially acquire the first test image as the first analysis image.

[0149] As illustrated in FIGS. 7 and 8, the first image sensor (210) can acquire a gray image (gm1) of a first gray value displayed on the display device (100) and then acquire a gray image (gm2) of a second gray value displayed on the display device (100). The first image sensor (210) can acquire all gray images displayed on the display device in response to the display of the gray images on the display device (100).

[0150] The first image sensor (210) can transmit the first analysis images acquired sequentially to the first control unit (240). That is, the first image sensor (210) can sequentially transmit multiple first analysis images for each of the multiple first test images acquired sequentially to the first control unit (240).

[0151] The first image sensor (210) can acquire a first test image as a first analysis image in real time and transmit the first analysis image, to which real-time visual information is matched, to the first control unit (240).

[0152] The first image sensor (210) may recognize whether the gray value has changed based on the acquired first analysis image, and if it recognizes that the gray value has changed, it may transmit information about the time of the change of the gray value to the first control unit (240).

[0153] The first image sensor (210) may include a camera capable of acquiring a grayscale image.

[0154] The first image sensor (210) may include a camera capable of recognizing changes in gray values.

[0155] The second image sensor (220) can acquire the second test image displayed on the display device (100) as the second analysis image.

[0156] The second analysis image may be an image for analyzing the quality of an image displayed on a display device (100).

[0157] The second test video may be a video for testing the quality of the video displayed on the display device (100).

[0158] The second analysis image and the second test image may include multiple block images arranged in columns and rows. The sizes of the multiple block images may be the same.

[0159] When there are n blocks, each of the n blocks may include a background image and a character image displayed within the background image. That is, the number of background images and the number of character images may correspond to the number of blocks.

[0160] In order to distinguish between a plurality of block images displayed on a display device and a plurality of block images obtained from a second image sensor (220) of an analysis device, a plurality of block images displayed on the display device are described as a second test image, and a plurality of block images obtained from a second image sensor (220) of an analysis device are described as a second analysis image.

[0161] n background images are images displayed on each of the n block images, and can have different gray values ​​for different columns.

[0162] n background images can be arranged into n block images based on the magnitude of the gray values.

[0163] n character images are images displayed on each of n block images, and can have different gray values ​​for different rows.

[0164] The second test image displayed on the display device (100) can be changed at a second reference time interval.

[0165] The second test image displayed on the display device (100) may include an image in which n character images are changed at a second reference time interval.

[0166] The second test image displayed on the display device (100) may include an image in which n character images are moved to the left column while maintaining the row at the second reference time interval and displayed within the background image of the left column.

[0167] The second test image displayed on the display device (100) may include an image in which n character images are moved to the right column while maintaining the row at the second reference time interval and displayed within the background image of the right column.

[0168] The second image sensor (220) can acquire a second test image displayed on the display device (100) as a second analysis image in real time and transmit the second analysis image acquired in real time to the first control unit (240).

[0169] As illustrated in FIGS. 9 and 10, the second image sensor (220) can acquire a first block image (bm1) displayed on the display device (100) and then acquire a second block image (bm2) displayed on the display device (100). The second image sensor (220) can acquire all block images displayed on the display device in response to the display of block images on the display device (100).

[0170] The number of block images shown in FIGS. 9 and 10 is 16, which is merely an example of a block image, and the number of block images is not limited to this.

[0171] A first block image (bm1) displayed on a display device (100) may include n background images (gb1) corresponding to grayscale bits and n character images (gt1) displayed within the n background images (gb1).

[0172] The second block image (bm2) displayed on the display device (100) may include n background images (gb1) and n character images (gt2) displayed within the n background images (gb1).

[0173] In the first and second block images, background images of the same row may have the same gray value, and background images of different rows may have different gray values.

[0174] In the first and second block images, character images in the same column may have the same gray value, and character images in different columns may have different gray values.

[0175] The second block image (bm2) displayed on the display device (100) may be an image in which all character images (gt2) in the first block image (bm1) displayed on the display device (100) have been moved to the left column.

[0176] The second image sensor (220) may include a camera dedicated to image quality detection capable of acquiring an image capable of image quality analysis. Here, image quality may include afterimage, inverse afterimage, and discoloration.

[0177] The second image sensor (220) may include a CCD (Charge-Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) image sensor, and the type of the second image sensor is not limited thereto.

[0178] The first communication unit (230) can communicate between internal components of the analysis device (200) or communicate with the display device (100).

[0179] The first communication unit (230) can transmit a display command for the first test image and a display command for the second test image to the display device (100) based on the control command of the first control unit (240).

[0180] The first communication unit (230) may request identification information of the display device (100) from the display device (100), and may also transmit the identification information of the display device (100) received from the display device (100) to the first control unit (240).

[0181] The first communication unit (230) can transmit an overdrive table to the display device (100) based on a control command from the first control unit (240).

[0182] The first communication unit (230) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel with the display device (100), and the performance of communication through the established communication channel.

[0183] According to an embodiment, the first communication unit (230) may include a wireless communication module (e.g., a cellular communication module, a short-range wireless communication module, or a GNSS (global navigation satellite system) communication module) or a wired communication module (e.g., a LAN (local area network) communication module, or a power line communication module).

[0184] The corresponding communication module among these first communication units (230) can communicate with an external device through a first network (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct or IrDA (infrared data association)) or a second network (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a long-range communication network such as a computer network (e.g., LAN or WAN). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips).

[0185] A short-range wireless communication module may include, but is not limited to, Bluetooth communication modules, BLE (Bluetooth Low Energy) communication modules, Near Field Communication modules, WLAN (Wi-Fi) communication modules, Zigbee communication modules, infrared (IrDA, infrared Data Association) communication modules, WFD (Wi-Fi Direct) communication modules, UWB (ultrawideband) communication modules, Ant+ communication modules, microwave (uWave) communication modules, etc.

[0186] The first control unit (240) can be electrically connected to various parts and / or devices of the analysis device (200) and can control various parts and / or devices. That is, the first control unit (240) controls the overall operation of the analysis device (200).

[0187] The first control unit (240) can control the operation of the analysis device (200) based on user input received by the first input unit (250).

[0188] The first control unit (240) can control the display unit (260) so that output information related to the operation of the analysis device (200) is output. The first control unit (240) will be explained in more detail.

[0189] The first control unit (240) recognizes whether it is connected to the display device (100) and can transmit an operation command to the display device (100) based on the recognition of the connection to the display device (100).

[0190] The connection with the display device (100) may include a connection by wired communication and a connection by wireless communication.

[0191] The operation command may include a display command for a first test image and a display command for a second test image.

[0192] The operation command may include an execution command for the first program and an execution command for the second program.

[0193] The first control unit (240) can request identification information of the display device (100) from the display device (100) and can receive identification information of the display device (100) from the display device (100).

[0194] The first control unit (240) may also receive identification information of the display device (100) from the first input unit (250).

[0195] The first control unit (240) may request specification information of the main chip or identification information of the main chip related to the image display of the display device, and may also receive specification information of the main chip or identification information of the main chip from the display device.

[0196] The first control unit (240) can recognize a grayscale based on the identification information of the display device, the specification information of the main chip, or the identification information of the main chip.

[0197] The first control unit (240) may also recognize an overdrive table based on the identification information of the display device, the specification information of the main chip, or the identification information of the main chip.

[0198] For example, when the first control unit (240) receives identification information of the display device from the display device, it is possible to recognize an overdrive table corresponding to the identification information of the display device from information stored in a server (not shown) or memory (not shown) and store the recognized overdrive table.

[0199] In a server (not shown) or memory (not shown), identification information of a display device, specification information of a main chip, or an overdrive table corresponding to the identification information of a main chip may be stored.

[0200] The first control unit (240) may request an overdrive table from the display device (100) and receive an overdrive table from the display device (100). The overdrive table received from the display device may be an original overdrive table.

[0201] The first control unit (240) can control the first communication unit (230) to transmit a first program for testing the response speed of the liquid crystal to a display device, and can control the first communication unit (230) to transmit a second program for testing the image quality to a display device. Here, the first program may be a program for displaying a first test image. The second program may be a program for displaying a second test image.

[0202] The first control unit (240) can control the display unit (260) to display identification information of the display device and can control the display unit (260) to display analysis progress information.

[0203] The first control unit (240) may also control the display unit (260) to display information about the analysis results.

[0204] The first control unit (240) may also control the display unit (260) to display transmission information of the corrected overdrive table.

[0205] The first control unit (240) can first correct the overdrive table based on the first analysis image received through the first image sensor (210), and secondly correct the overdrive table that was first corrected based on the second analysis image received through the second image sensor (220).

[0206] When the first control unit (240) first corrects the overdrive table based on the first analysis image received through the first image sensor (210), it can first correct the overdrive table until the recognized response time is included in the reference response time range. That is, the first control unit (240) can repeatedly correct the overdrive table until the recognized response time is included in the reference response time range.

[0207] When the first control unit (240) repeatedly corrects the overdrive table based on the response time, it can transmit the corrected overdrive table to the display device and transmit a display command for the first test image using the corrected overdrive table.

[0208] Whenever a first test image is displayed using a corrected table on a display device, the first control unit (240) can repeat the process of correcting the overdrive table based on the first analysis image for the first test image.

[0209] The first control unit (240) can repeat the correction of the overdrive table based on the fact that the recognized image quality is recognized as an abnormal state when correcting the overdrive table a second time based on the second analysis image received through the second image sensor (220).

[0210] When the first control unit (240) repeatedly corrects the overdrive table based on image quality, it can transmit the corrected overdrive table to a display device and transmit a display command for a second test image using the corrected overdrive table.

[0211] Whenever a second test image is displayed using a corrected table on a display device, the first control unit (240) can repeat the process of correcting the overdrive table based on the second analysis image for the second test image.

[0212] When the first control unit (240) corrects the overdrive table a second time based on the second analysis image received through the second image sensor (220), it can make a final correction to the overdrive table a second time based on the fact that the recognized image quality is recognized as normal. That is, the first control unit (240) can repeatedly correct the overdrive table until the image quality is recognized as normal.

[0213] Correcting the overdrive table based on response speed is described as the first correction, and correcting the overdrive table based on image quality is described as the second correction, but the order of correction can be changed.

[0214] It is also possible to perform only one of the corrections, either correcting the overdrive table based on response speed or correcting the overdrive table based on image quality.

[0215] The first and second corrections of the overdrive table of the first control unit are explained in more detail.

[0216] <Primary Correction of Overdrive Table>

[0217] The first control unit (240) can recognize the response speed when changing from a gray image with an initial gray value to a gray image with a changed gray value based on the first analysis image received from the first image sensor (210).

[0218] Here, response speed may include response time.

[0219] The changed gray value may be larger or smaller than the initial gray value.

[0220] Referring to the response time table shown in FIG. 11, an example of recognizing the respective response times when displaying a first gray image (max gray value 0%), a second gray image (max gray value 20%), a third gray image (max gray value 40%), a fourth gray image (max gray value 60%), a fifth gray image (max gray value 80%), and a sixth gray image (max gray value 100%) is described.

[0221] For example, the first control unit (240) may recognize a first time when a first gray image is acquired by the first image sensor (210), recognize a second time when a second gray image is acquired by the first image sensor (210), recognize a third time when a third gray image is acquired by the first image sensor (210), recognize a fourth time when a fourth gray image is acquired by the first image sensor (210), recognize a fifth time when a fifth gray image is acquired by the first image sensor (210), and recognize a sixth time when a sixth gray image is acquired by the first image sensor (210).

[0222] The first control unit (240) can recognize a first response time that changes from a first gray image to a first gray image based on an initial time and a first time corresponding to the start time of the test, recognize a second response time that changes from a first gray image to a second gray image based on an initial time and a second time, recognize a third response time that changes from a first gray image to a third gray image based on an initial time and a third time, recognize a fourth response time that changes from a first gray image to a fourth gray image based on an initial time and a fourth time, recognize a fifth response time that changes from a first gray image to a fifth gray image based on an initial time and a fifth time, and recognize a sixth response time that changes from a first gray image to a sixth gray image based on an initial time and a sixth time.

[0223] The first control unit (240) recognizes a 7th response time that changes from the 2nd gray image to the 1st gray image based on an initial time corresponding to the start time of the test, a 1st reference time, and a 7th time when the 1st gray image is acquired, recognizes an 8th response time that changes from the 2nd gray image to the 2nd gray image based on an 8th time when the 2nd gray image is acquired, recognizes a 9th response time that changes from the 2nd gray image to the 3rd gray image based on an initial time, a 1st reference time, and a 9th time when the 3rd gray image is acquired, recognizes a 10th response time that changes from the 2nd gray image to the 4th gray image based on an initial time, a 1st reference time, and a 10th time when the 4th gray image is acquired, recognizes an 11th response time that changes from the 2nd gray image to the 5th gray image based on an initial time, a 1st reference time, and an 11th time when the 5th gray image is acquired, and the initial time, a 1st reference time, and a 6th gray image Based on the acquired 12th time, the 12th response time, which is changed from the 2nd grayscale image to the 6th grayscale image, can be recognized.

[0224] In this way, the first control unit (240) can recognize the response time when changing from the initial gray value to the changed gray value for each gray value. The first control unit (240) can obtain the response time when changing from the initial gray value to the changed gray value for each gray value as a response time table.

[0225] Here, the gray value can include all gray values ​​corresponding to the bits of the gray scale.

[0226] The gray value may include some selected gray values ​​among all gray values ​​corresponding to the bits of the gray scale.

[0227] The first control unit (240) can recognize the average response time for each recognized response time and recognize the reference response time based on the recognized average response time.

[0228] Here, the reference response time can be the average response time, or a response time that is lower than the average response time by a certain amount. The certain amount of time can be a preset time.

[0229] The first control unit (240) may also receive a reference response time from the first input unit (250).

[0230] The first control unit (240) can recognize a reference response time range based on the reference response time. For example, the reference response time range may include a range from 0 to the reference response time.

[0231] For example, the first control unit (240) recognizes the maximum response time among the recognized response times, recognizes gray values ​​corresponding to the recognized maximum response time, recognizes the set voltage of each of the recognized gray values, and can correct each of the recognized set voltages. This is explained by example.

[0232] Referring to FIG. 11, the first control unit (240) can correct all set voltages when changing from a first gray value to another gray value. At this time, the first control unit (240) can correct all set voltages when changing from a first gray value to another gray value by increasing them by a certain voltage.

[0233] As another example, the first control unit (240) may recognize at least one response time greater than a reference response time among the recognized response times, recognize at least one gray value corresponding to the recognized at least one response time, recognize a set voltage of the recognized gray value, and correct the recognized set voltage. This is explained by example.

[0234] For the case where the reference response time is 1.4ms, the first control unit (240) recognizes at least one response time greater than the reference response time, such as 5.2ms, 5.6ms, and 5.7ms, recognizes the initial gray value and the change gray value for each recognized response time, recognizes all the set voltages when changing from the initial gray value to the change gray value for each response time, and can correct all the recognized set voltages.

[0235] The initial gray value is the first gray value, and the change gray value may include the second gray value, the third gray value, the fourth gray value, the fifth gray value, and the sixth gray value. At this time, the first control unit (240) can correct the setting voltages by increasing all of them by a certain voltage when changing from the first gray value to another gray value.

[0236] As another example, the first control unit (240) may recognize a plurality of response times that are smaller than a reference response time among the recognized response times, recognize at least one response time among the recognized plurality of response times that has the smallest difference from the reference response time, recognize at least one gray value corresponding to the recognized at least one response time, recognize a set voltage of the recognized gray value, and correct the recognized set voltage. This is explained by example.

[0237] For the case where the reference response time is 1.4ms, the first control unit (240) recognizes a plurality of response times 0.5ms, 0.6ms, and 0.7ms that are smaller than the reference response time, recognizes the response time 0.7ms that has the smallest difference from the reference response time among the recognized response times, recognizes an initial gray value and a changed gray value corresponding to the recognized response time 0.7ms, recognizes the set voltage when changing from the initial gray value to the changed gray value, and can correct the recognized set voltage.

[0238] Since the initial gray value is greater than the changed gray value, the first control unit (240) can perform polling overdrive control corresponding to the decrease in the gray value. That is, the first control unit (240) can correct the recognized set voltage to be lower by a certain voltage.

[0239] When the first control unit (240) performs rising overdrive control corresponding to the rise in the gray value, it can correct the set voltage of the gray value by raising the set voltage of the recognized gray value by a certain voltage.

[0240] When the first control unit (240) performs polling overdrive control corresponding to the decrease in the gray value, it can correct the set voltage of the gray value by lowering the set voltage of the recognized gray value by a certain voltage.

[0241] The first control unit (240) can correct the overdrive table by correcting at least one gray value setting voltage in the original overdrive table to a corrected setting voltage.

[0242] The first control unit (240) can recognize whether the recognized response times are included in the reference response time range.

[0243] The first control unit (240) can correct the setting voltage of at least one gray value based on the fact that at least one of the recognized response times deviates from the reference response time range, and then recognize the response time when changing from the initial gray value to the changed gray value, and repeat the process of correcting the setting voltage of at least one gray value again based on the recognized response time and the reference response time range.

[0244] Here, the reference response time range may be changed by the recognized response times.

[0245] The first control unit (240) can repeat the process of correcting the overdrive table based on at least one of the recognized response times being outside the reference response time range.

[0246] The first control unit (240) can terminate the primary correction of the overdrive table based on the fact that all recognized response times are included in the reference response time range.

[0247] Secondary Correction of Overdrive Table

[0248] The first control unit (240) can recognize the image quality based on the second analysis image received from the second image sensor (220).

[0249] The first control unit (240) can recognize the image quality based on the second analysis image received in real time from the second image sensor (220).

[0250] The first control unit (240) can recognize changes in a plurality of block images based on the second analysis image received in real time, and can recognize whether the image quality is in a normal state or an abnormal state based on the recognized changes in the plurality of block images.

[0251] The change of multiple block images may include the change of multiple character images within multiple background images.

[0252] The image quality may include at least one of afterimage, inverse afterimage, and color distortion. Color distortion may include a state in which a color different from the target color is displayed.

[0253] The first control unit (240) can recognize the image quality using a pre-stored image analysis program.

[0254] The first control unit (240) can recognize the image quality as abnormal based on the recognition of at least one of afterimage, inverse afterimage, and discoloration within a plurality of block images.

[0255] As illustrated in FIG. 12, the first control unit (240) can recognize a color block image (s1, s2) in which a color is recognized based on color recognition, recognize an inverse afterimage block image (s3, s4) in which an inverse afterimage is recognized based on inverse afterimage recognition, and recognize an afterimage block image (s5, s6) in which an afterimage is recognized based on afterimage recognition.

[0256] The first control unit (240) recognizes the gray value of the background image and the gray value of the character image of the recognized colored block image, recognizes a setting voltage corresponding to the change from the gray value of the background image to the gray value of the character image, and can correct the recognized setting voltage.

[0257] The first control unit (240) recognizes the gray value of the background image and the gray value of the character image of the recognized inverse afterimage block image, and can correct the set voltage by raising the set voltage by a certain voltage based on the gray value of the character image and the gray value of the background image.

[0258] The first control unit (240) can perform control to increase the set voltage corresponding to the polling overdrive control based on inverse afterimage recognition.

[0259] Polling overdrive control may include control to lower the voltage to change the gray value to a gray value lower than the current gray value.

[0260] Inverse afterimage may occur when the voltage of the liquid crystal unit reaches the target voltage early due to a high set voltage during polling overdrive control.

[0261] That is, the first control unit (240) recognizes a relatively higher gray value and a relatively lower gray value between the gray value of the recognized character image and the gray value of the background image, recognizes a set voltage when changing from the recognized high gray value to the recognized low gray value, and can correct the recognized set voltage by increasing the recognized set voltage by a certain voltage.

[0262] The first control unit (240) recognizes the gray value of the background image and the gray value of the character image of the recognized afterimage block image, and can correct the set voltage by raising the set voltage by a certain voltage based on the gray value of the background image and the gray value of the character image.

[0263] The first control unit (240) can perform control to increase the set voltage corresponding to the rising overdrive control based on afterimage recognition.

[0264] Rising overdrive control may include control to raise the voltage to change the gray value to a gray value higher than the current gray value.

[0265] Afterimages may occur when the voltage of the liquid crystal part reaches the target voltage slowly due to a low set voltage.

[0266] That is, the first control unit (240) recognizes a relatively higher gray value and a relatively lower gray value among the gray values ​​of the recognized character image and the gray value of the background image, recognizes a set voltage when changing from the recognized low gray value to the recognized high gray value, and can correct the recognized set voltage by increasing the recognized set voltage by a certain voltage.

[0267] The first control unit (240) can secondarily correct an overdrive table that has been first corrected based on the recognition of at least one of afterimage, inverse afterimage, and color distortion within a plurality of block images.

[0268] The first control unit (240) can repeat the secondary correction of the overdrive table until afterimages, inverse afterimages, and discoloration are not recognized within a plurality of block images.

[0269] The first control unit (240) can recognize the image quality as normal based on the fact that afterimages, inverse afterimages, and color distortion are not recognized within a plurality of block images, and can terminate the secondary correction of the overdrive table.

[0270] Below, another example of determining the correction of an overdrive table based on color distortion, afterimage, and inverse afterimage recognition is described.

[0271] The first control unit (240) can recognize the color of a character image in a color block image (s1, s2) in which color is recognized, recognize the difference between the color of the character image to be actually displayed and the recognized color, and determine whether to correct the overdrive table for color based on the recognized difference.

[0272] For example, the first control unit (240) recognizes color information corresponding to a recognized color based on preset color standard information, recognizes a color distortion ratio based on the recognized color information and the color information of the character image to be actually displayed, can correct the overdrive table based on the recognized color distortion ratio exceeding a first reference ratio, and can maintain the overdrive table based on the recognized color distortion ratio being less than or equal to the first reference ratio.

[0273] The first control unit (240) can recognize a colored block image as a normal block image based on the fact that the recognized colored ratio is less than or equal to the first reference ratio.

[0274] As illustrated in FIG. 13, the first control unit (240) recognizes the actual character image and the inverse character image in the recognized inverse character block image, recognizes the ratio (x%) of the inverse character image to the actual character image, can correct the overdrive table based on whether the recognized ratio (x%) exceeds the second reference ratio, and can maintain the overdrive table based on whether the recognized ratio is less than or equal to the second reference ratio.

[0275] For example, recognizing the ratio of an inverse afterimage character image to an actual character image may include recognizing the ratio of the area occupied by the actual character image in the background image to the area occupied by the inverse afterimage character image in the background area.

[0276] The first control unit (240) can recognize the inverse afterimage block image as a normal state block image based on the fact that the recognized ratio is less than or equal to the second reference ratio.

[0277] The first control unit (240) recognizes the actual character image and the afterimage character image in the recognized afterimage block image, recognizes the ratio of the inverse afterimage (->afterimage) character image to the actual character image, can correct the overdrive table based on whether the recognized ratio exceeds the third reference ratio, and can maintain the overdrive table based on whether the recognized ratio is less than or equal to the third reference ratio.

[0278] For example, recognizing the ratio of the afterimage character image to the actual character image may include recognizing the ratio of the area occupied by the actual character image in the background image to the area occupied by the afterimage character image in the background area.

[0279] The first control unit (240) can recognize the residual block image as a normal state block image based on the fact that the recognized ratio is less than or equal to the third reference ratio.

[0280] The first, second, and third standard ratios may be the same or different from each other.

[0281] The first control unit (240) may include at least one first processor (241) for controlling the operation of the analysis device (200) and at least one first memory (242) for storing a program and data for controlling the operation of the analysis device (200).

[0282] At least one first processor (241) may include an algorithm for controlling the operation of components within the analysis device (200), at least one memory for storing data in the form of a program, and one or more processor chips that perform the aforementioned operation using the data stored in at least one memory, or one or more processing cores.

[0283] At least one first processor (241) can process various data and various signals using instructions, data, programs and / or software stored in the first memory (242).

[0284] At least one first processor (241) may include one or more of a CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerated Processing Unit), MIC (Many Integrated Core), DSP (Digital Signal Processor), NPU (Neural Processing Unit), hardware accelerator, or machine learning accelerator.

[0285] The first memory (242) can store the original overdrive table received from the display device.

[0286] The first memory (242) can store an overdrive table that has been corrected in the first stage.

[0287] The first memory (242) can store a second-corrected overdrive table.

[0288] The first memory (242) can store an original overdrive table corresponding to the identification information of the display device.

[0289] The first memory (242) can store reference image quality information for recognizing the normal state of the image quality.

[0290] The first memory (242) can store a first program for testing the response speed of the liquid crystal.

[0291] The first memory (242) can store a second program for testing the image quality. For example, the second program for testing the image quality may include a program for checking the afterimage of the image.

[0292] The first memory (242) can store a third program for analyzing the image quality.

[0293] The third program may be a program using artificial intelligence.

[0294] The first memory (242) can store data necessary for various embodiments.

[0295] The first memory (242) may be implemented in the form of a memory embedded in the analysis device (200) or in the form of a memory that can be attached to the analysis device (200) depending on the purpose of data storage. For example, data for operating the analysis device (200) may be stored in a memory embedded in the analysis device (200), and data for the expansion function of the analysis device (200) may be stored in a memory that can be attached to the analysis device (200).

[0296] Meanwhile, the memory embedded in the analysis device (200) may be implemented as at least one of volatile memory (e.g., DRAM (dynamic RAM), SRAM (static RAM), or SDRAM (synchronous dynamic RAM), non-volatile memory (e.g., OTPROM (one time programmable ROM), PROM (programmable ROM), EPROM (erasable and programmable ROM), EEPROM (electrically erasable and programmable ROM), mask ROM, flash ROM, flash memory (e.g., NAND flash or NOR flash), hard drive, or solid state drive (SSD).

[0297] In addition, the memory that can be attached to the analysis device (200) may be implemented in the form of a memory card (e.g., CF (compact flash), SD (secure digital), Micro-SD (micro secure digital), Mini-SD (mini secure digital), xD (extreme digital), MMC (multi-media card), etc.) or an external memory that can be connected to a USB port (e.g., USB memory), but is not limited thereto.

[0298] The first memory (242) may include one or more memory chips or one or more memory blocks.

[0299] The first input unit (250) can receive user input. Here, user input may include input from a manager, input from an analyst, etc.

[0300] The first input unit (250) can receive transmission commands for the first and second programs.

[0301] The first input unit (250) can receive execution commands for the first and second programs. Or the first input unit (250) can receive display commands for the first and second test images.

[0302] The first input unit (250) can receive an analysis start command, an analysis end command, etc. of the display device (100).

[0303] The first input unit (250) may also receive identification information of the display device (100).

[0304] The first input unit (250) may include hardware devices such as various buttons or switches, pedals, keyboards, mice, trackballs, various levers, handles or sticks.

[0305] Additionally, the first input unit (250) may include a device that is a GUI (Graphical User Interface), such as a touch pad, i.e., software. The touch pad may be implemented as a touch screen panel (TSP) and form a layered structure with the display unit.

[0306] It can be composed of a touch screen panel (TSP) that forms an interlayer structure with the touch pad.

[0307] The display unit (260) can display analysis result information of the display device (100) and can display analysis progress information.

[0308] The display unit (260) may display transmission information of the overdrive table of the display device (100) and may also display identification information of the display device (100).

[0309] The display unit (260) may be provided with a cathode ray tube (CRT), digital light processing (DLP) panel, plasma display panel, liquid crystal display (LCD) panel, electroluminescence (EL) panel, electrophoretic display (EPD) panel, electrochromic display (ECD) panel, light-emitting diode (LED) panel or organic light-emitting diode (OLED) panel, but is not limited thereto.

[0310] The functions related to artificial intelligence according to the present disclosure are operated through a processor and memory. The processor may be composed of one or more processors. In this case, the one or more processors may be general-purpose processors such as CPUs, APs, and DSPs (Digital Signal Processors), graphics-dedicated processors such as GPUs and VPUs (Vision Processing Units), or artificial intelligence-dedicated processors such as NPUs. The one or more processors control the processing of input data according to predefined operation rules or artificial intelligence models stored in memory. Alternatively, if the one or more processors are artificial intelligence-dedicated processors, the artificial intelligence-dedicated processors may be designed with a hardware structure specialized for processing a specific artificial intelligence model.

[0311] The predefined rules of operation or artificial intelligence models are characterized by being created through learning. Here, being created through learning means that a predefined rules of operation or artificial intelligence models configured to perform desired characteristics (or objectives) are created by a basic artificial intelligence model being trained using multiple learning data by a learning algorithm. Such learning may be performed on the device itself where the artificial intelligence according to the present disclosure is executed, or it may be performed through a separate server and / or system. Examples of learning algorithms include supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but are not limited to the examples described above.

[0312] An artificial intelligence model may be composed of multiple neural network layers. Each of the multiple neural network layers has multiple weight values ​​and performs neural network operations through operations between the results of previous layers and the multiple weights. The multiple weights possessed by the multiple neural network layers can be optimized based on the learning results of the artificial intelligence model. For example, the multiple weights may be updated so that the loss value or cost value obtained from the artificial intelligence model during the learning process is reduced or minimized. Artificial neural networks may include deep neural networks (DNNs), such as Convolutional Neural Networks (CNNs), Deep Neural Networks (DNNs), Recurrent Neural Networks (RNNs), Restricted Boltzmann Machines (RBMs), Deep Belief Networks (DBNs), Bidirectional Recurrent Deep Neural Networks (BRDNNs), or Deep Q-Networks, but are not limited to the examples mentioned above.

[0313] At least one component may be added or removed in response to the performance of the components of the analysis device illustrated in FIG. 6. Additionally, it will be readily understood by those skilled in the art that the relative positions of the components may be changed in response to the performance or structure of the system.

[0314] Meanwhile, each component illustrated in Fig. 6 refers to a software and / or hardware component such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

[0315] FIG. 14 is a control configuration diagram of a display device according to one embodiment.

[0316] The display device may include a display panel (120), a second input unit (130), a second communication unit (140), and a second control unit (150).

[0317] The display panel (120) can display an image based on the control command of the second control unit (150).

[0318] For example, the display panel (120) can display a first test video for recognizing response time and a second test video for recognizing image quality.

[0319] The display panel (120) may include a liquid crystal display panel. The description of the display panel is as described in FIG. 2, so the description here is omitted.

[0320] The second input unit (130) can receive user input. Here, user input may include input from an administrator, input from an analyst, etc.

[0321] The second input unit (130) can receive a communication connection command and a communication termination command with the analysis device (200).

[0322] The second input unit (130) can receive a correction start command for the overdrive table and a correction end command for the overdrive table.

[0323] The second input unit (130) can receive an execution command for at least one of the first and second programs.

[0324] The second input unit (130) can receive a display command for the first and second test images.

[0325] The second input unit (130) can receive power on and off commands.

[0326] The second input unit (130) may include hardware devices such as various buttons or switches, pedals, keyboards, mice, trackballs, various levers, handles or sticks.

[0327] The second input unit (130) may include a GUI (Graphical User Interface), such as a touch pad, i.e., a software device. The touch pad may be implemented as a touch screen panel (TSP) and may form a layered structure with the display unit.

[0328] It can be composed of a touch screen panel (TSP) that forms an interlayer structure with the touch pad.

[0329] The second communication unit (140) can perform communication between internal components of the display device (100) or with the analysis device (200).

[0330] The second communication unit (140) can receive a display command for the first test image and a display command for the second test image from the analysis device (200) and transmit the received display command for the first test image and the display command for the second test image to the second control unit (150).

[0331] The second communication unit (140) can transmit identification information of the display device to the analysis unit (200) based on receiving request information for identification information of the display device from the analysis unit (200).

[0332] The second communication unit (140) can transmit the corrected overdrive table to the second control unit (150) based on receiving the corrected overdrive table from the analysis device (200).

[0333] The second communication unit (140) can transmit at least one of the first and second programs received from the analysis device (200) to the second control unit (150).

[0334] The second communication unit (140) can transmit at least one execution command of the first and second programs received from the analysis device (200) to the second control unit (150).

[0335] The second communication unit (140) may also transmit information about the initial time, which is the start time of the test, to the analysis device (200) based on the control command of the second control unit (150).

[0336] The second communication unit (140) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel with the analysis device (200), and the performance of communication through the established communication channel.

[0337] The second communication unit (140) may also transmit specification information of the main chip or identification information of the main chip related to the image display of the display device to the analysis device (200).

[0338] The second communication unit (140) can also transmit information about the original overdrive table to the analysis device (200).

[0339] The second communication unit (140) can also transmit information about the target voltage for each gray value to the analysis device (200).

[0340] The second communication unit (140) can transmit information regarding the minimum voltage for each gray value during rising overdrive control to the analysis device (200), and it is also possible to transmit information regarding the maximum voltage for each gray value during falling overdrive control to the analysis device (200).

[0341] A specific example of the second communication unit (140) is the same as a specific example of the first communication unit (230), so the explanation is omitted.

[0342] The second control unit (150) can be electrically connected to various parts and / or devices of the display device (100) and can control various parts and / or devices. That is, the second control unit (150) controls the overall operation of the display device (100).

[0343] The second control unit (150) can control the operation of the display device (100) based on user input received by the second input unit (130).

[0344] The second control unit (150) can control the display panel (120) so that output information related to the operation of the display device (100) is output.

[0345] The second control unit (150) can control the second communication unit (140) to recognize whether there is a connection with the analysis device (200) and to transmit identification information of the display device to the analysis device (200) based on the recognition of a connection with the analysis device (200).

[0346] The connection with the analysis device (200) may include a connection via wired communication and a connection via wireless communication.

[0347] The second control unit (150) may also control the second communication unit (140) to transmit identification information of the main chip of the display device to the analysis device (200) based on the connection with the analysis device (200).

[0348] The second control unit (150) can control the storage of the received first program when the first program for testing the response speed of the liquid crystal is received.

[0349] The second control unit (150) can control the storage of the received second program when the second program for testing the image quality is received.

[0350] It is also possible for at least one of the first and second programs to be stored in the second memory (152).

[0351] The second control unit (150) can control the execution of the first program based on receiving an execution command of the first program from the analysis device (200) or the second input unit (130).

[0352] The second control unit (150) can control the display panel so that the first test image is displayed when controlling the execution of the first program.

[0353] The second control unit (150) can control the display panel to display the first test image based on receiving a display command for the first test image from the analysis device (200) or the second input unit (130).

[0354] The first test image is a plurality of gray images having different gray values, and may include the nth gray image of the nth gray value (gn) from the first gray image of the first gray value (g1). Here, n may be a number corresponding to the bits of the gray scale.

[0355] The first test image may include a gray image of a first gray value (g1), a gray image of an n-th gray value (gn), and a plurality of gray images having different gray values ​​at reference ratio intervals from the first gray value (g1) to the n-th gray value (gn).

[0356] For example, the reference ratio may be approximately 5%, approximately 10%, or approximately 20%. This is just one example of a reference ratio, and the reference ratio is not limited to this.

[0357] When n is 256 and the reference ratio is 20%, the first test image may include a first gray image of a first gray value (g1), a second gray image of a 51st gray value, a third gray image of a 102nd gray value, a fourth gray image of a 153rd gray value, a fifth gray image of a 204th gray value, and a sixth gray image of a 256th gray value (g256).

[0358] The first test image may include a gray image of a first gray value (g1), a gray image of an n-th gray value (gn), and a plurality of gray images having gray values ​​at intervals of reference multiples between the first gray value (g1) and the n-th gray value (gn).

[0359] For example, the reference multiple can be 8, 16, 32, or 64. This is just one example of a reference multiple, and the reference multiple is not limited to this.

[0360] When n is 256 and the reference multiple is 32, the first test image may include a first gray image of a first gray value (g1), a second gray image of a 32-gray value, a fourth gray image of a 64-gray value, a fifth gray image of a 96-gray value, a sixth gray image of a 128-gray value, a seventh gray image of a 160-gray value, an eighth gray image of a 192-gray value, a ninth gray image of a 224-gray value, and a tenth gray image of a 256-gray value (g256).

[0361] The first test image may include a gray image in which the gray value changes at a first reference time interval. Here, the first reference time may be the display maintenance time of the currently displayed gray image, or it may be a time for recognizing the point in time when voltage is applied to display the gray image in which the gray value has changed.

[0362] For example, the display device (100) may sequentially apply a first setting voltage and a first target voltage to the liquid crystal unit (125) to display a gray image of a first gray value at the initial time of the test, and when a first reference time elapses from the time the first setting voltage is applied to the liquid crystal unit, sequentially apply a second setting voltage and a second target voltage to the liquid crystal unit (125) to display a gray image of a second gray value, and when a first reference time elapses from the time the second setting voltage is applied to the liquid crystal unit, sequentially apply a third setting voltage and a fourth target voltage to the liquid crystal unit (125) to display a gray image of a third gray value.

[0363] The initial time of the test may be the starting point at which voltage is applied to the liquid crystal portion to display a gray image of the first gray value.

[0364] The second control unit (150) can control the display panel (120) to sequentially display multiple gray images having different gray values.

[0365] The second control unit (150) can terminate the first program based on the fact that multiple gray images having different gray values ​​are all displayed.

[0366] The second control unit (150) can terminate the display control of the first test image based on the fact that multiple gray images having different gray values ​​are all displayed.

[0367] The second control unit (150) can control the execution of the second program based on receiving an execution command for the second program from the analysis device (200) or the second input unit (130).

[0368] The second control unit (150) can control the display panel (120) so that the second test video is displayed when controlling the execution of the second program.

[0369] The second control unit (150) can control the display panel (120) to display the second test image based on receiving a display command for the second test image from the analysis device (200) or the second input unit (130).

[0370] The second control unit (150) can control the display panel (120) to display the second test video in real time.

[0371] For example, the second control unit (150) can control the display panel to display the first block image (bm1), and when the second reference time has elapsed, control the display panel (120) to display the second block image (bm2).

[0372] The first block image (bm1) may include n background images (gb1) corresponding to grayscale bits and n character images (gt1) displayed within the n background images (gb1).

[0373] The second block image (bm2) may include n background images (gb1) and n character images (gt2->gt1) displayed within the n background images (gb1).

[0374] In the first and second block images, background images of the same row may have the same gray value, and background images of different rows may have different gray values.

[0375] In the first and second block images, character images in the same column may have the same gray value, and character images in different columns may have different gray values.

[0376] The second block image (bm2) displayed on the display device (100) may be an image in which all character images (gt2) in the first block image (bm1) displayed on the display device (100) have been moved to the left column.

[0377] The second control unit (150) can terminate the second program based on the fact that all block images are displayed.

[0378] When the second control unit (150) receives a corrected overdrive table from the second communication unit (140), it can update the original overdrive table stored in the second memory (152) with the corrected overdrive table.

[0379] The second control unit (150) can control the voltage applied to the liquid crystal unit based on an updated overdrive table. Controlling the voltage applied to the liquid crystal unit may include controlling the electric field in the liquid crystal unit. Controlling the voltage applied to the liquid crystal unit may include controlling the voltage applied to the first and second electrode units.

[0380] The case in which the gray value of the liquid crystal unit (125) is increased from the first gray value to the second gray value is described. Here, the first gray value is the initial gray value, and the second gray value may be the changed gray value.

[0381] It is explained assuming that a first target voltage and a first setting voltage corresponding to a first gray value are stored, and a second target voltage and a second setting voltage corresponding to a second gray value are stored.

[0382] The second control unit (150) can control the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) rises from a first target voltage to a second set voltage, control the voltage applied to the liquid crystal unit (125) so that when the voltage applied to the liquid crystal unit (125) reaches the second set voltage, the voltage applied to the liquid crystal unit (125) drops to the second target voltage, and control the voltage applied to the liquid crystal unit (125) so that when the voltage applied to the liquid crystal unit (125) reaches the second target voltage, the voltage applied to the liquid crystal unit (125) is maintained at the second target voltage.

[0383] The second setting voltage may be a voltage stored in the overdrive table.

[0384] The second setting voltage is a voltage for reducing the response time when changing from the first gray value to the second gray value, and may be a voltage higher than the second target voltage.

[0385] It is explained assuming that a second target voltage, a second set voltage, a second maximum voltage, and a second minimum voltage corresponding to a second gray value are stored, and a first target voltage, a second set voltage, a first minimum voltage, and a first maximum voltage corresponding to a first gray value are stored.

[0386] The second control unit (150) controls the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) rises from a first target voltage to a second set voltage, controls the voltage applied to the liquid crystal unit (125) so that when the voltage applied to the liquid crystal unit (125) reaches the second set voltage, the voltage applied to the liquid crystal unit (125) drops to a second minimum voltage, controls the voltage applied to the liquid crystal unit (125) so that when the voltage applied to the liquid crystal unit (125) reaches the second minimum voltage, the voltage applied to the liquid crystal unit (125) rises to a second target voltage, and controls the voltage applied to the liquid crystal unit (125) so that when the voltage applied to the liquid crystal unit (125) reaches the second target voltage, the voltage applied to the liquid crystal unit (125) is maintained at the second target voltage.

[0387] I will explain the case where the gray value of the liquid crystal part (125) is lowered from the fourth gray value to the third gray value.

[0388] The explanation assumes that a fourth target voltage and a fourth setting voltage corresponding to a fourth gray value are stored, and a third target voltage and a third setting voltage corresponding to a third gray value are stored.

[0389] For example, the second control unit (150) can control the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) decreases from a fourth target voltage to a third set voltage, and when the voltage applied to the liquid crystal unit (125) reaches the third set voltage, the voltage applied to the liquid crystal unit (125) can be controlled so that the voltage applied to the liquid crystal unit (125) decreases to a third target voltage, and when the voltage applied to the liquid crystal unit (125) reaches the third target voltage, the voltage applied to the liquid crystal unit (125) can be controlled so that the voltage applied to the liquid crystal unit (125) is maintained at the third target voltage.

[0390] The third setting voltage may be a voltage stored in the overdrive table.

[0391] The third setting voltage is a voltage for reducing the response time when changing from the fourth gray value to the third gray value, and may be a voltage lower than the third target voltage.

[0392] The explanation assumes that the fourth target voltage, fourth setting voltage, fourth maximum voltage, and fourth minimum voltage corresponding to the fourth gray value are stored, and the third target voltage, third setting voltage, third minimum voltage, and third maximum voltage corresponding to the third gray value are stored.

[0393] As another example, the second control unit (150) controls the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) decreases from a fourth target voltage to a third set voltage, and when the voltage applied to the liquid crystal unit (125) reaches the third set voltage, controls the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) increases to a third maximum voltage, and when the voltage applied to the liquid crystal unit (125) reaches the third maximum voltage, controls the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) decreases to a third target voltage, and when the voltage applied to the liquid crystal unit (125) reaches the third target voltage, controls the voltage applied to the liquid crystal unit (125) so that the voltage applied to the liquid crystal unit (125) is maintained at the third target voltage.

[0394] That is, when the second control unit (150) increases the gray value from the initial gray value to the changed gray value, it recognizes a setting voltage from the overdrive table for changing from the initial gray value to the changed gray value, recognizes a target voltage corresponding to the changed gray value, controls the voltage applied to the liquid crystal unit (125) to increase to the recognized setting voltage, and then controls the voltage applied to the liquid crystal unit (125) to decrease to the recognized target voltage.

[0395] When lowering the gray value from the initial gray value to the changed gray value, the second control unit (150) recognizes a setting voltage from the overdrive table for changing from the initial gray value to the changed gray value, recognizes a target voltage corresponding to the changed gray value, controls the voltage applied to the liquid crystal unit (125) to decrease to the recognized setting voltage, and then controls the voltage applied to the liquid crystal unit (125) to increase so that it reaches the recognized target voltage.

[0396] Whenever the second control unit (150) receives a command to display the corrected overdrive table and the first test image from the analysis device, it can correct the stored overdrive table to the corrected overdrive table and control the display panel so that the first test image is displayed based on the corrected overdrive table.

[0397] Whenever the second control unit (150) receives a command to display the corrected overdrive table and the second test image from the analysis device, it can correct the stored overdrive table to the corrected overdrive table and control the display panel so that the second test image is displayed based on the corrected overdrive table.

[0398] When the second control unit (150) receives the finally corrected overdrive table from the analysis device, it can finally correct the overdrive table stored in the second memory based on the received finally corrected overdrive table.

[0399] The second control unit (150) receives a corrected overdrive table from an external memory device based on the connection of an external memory device such as a USB, and it is also possible to update the original overdrive table stored in the second memory using the received overdrive table.

[0400] In this case, the external memory device can receive and store the corrected overdrive table from the analysis device and transmit the corrected overdrive table to the display device.

[0401] The second control unit (150) may include at least one second processor (151) for controlling the operation of the display device (100) and at least one second memory (152) for storing a program and data for controlling the operation of the display device (100).

[0402] At least one (1->2) processor (151) may include an algorithm for controlling the operation of components within a display device (100), at least one memory for storing data in the form of a program, and one or more processor chips that perform the aforementioned operation using the data stored in at least one memory, or one or more processing cores.

[0403] At least one second processor (151) can process various data and various signals using instructions, data, programs and / or software stored in the second memory (152).

[0404] At least one second processor (151) may include one or more of a CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerated Processing Unit), MIC (Many Integrated Core), DSP (Digital Signal Processor), NPU (Neural Processing Unit), hardware accelerator, or machine learning accelerator.

[0405] The second memory (152) can store the original overdrive table.

[0406] The original overdrive table may include information on the setting voltage for changing from the initial gray value to the changed gray value for each gray value.

[0407] The second memory (152) can store the updated overdrive table.

[0408] The second memory (152) can store identification information of the display device.

[0409] The second memory (152) can store information about the target voltage for each gray value.

[0410] The second memory (152) can also store information about the maximum voltage and minimum voltage for each gray value.

[0411] The second memory (152) can store the first program for testing the response speed of the liquid crystal.

[0412] The second memory (152) can store a second program for testing the image quality. For example, the second program for testing the image quality may include a program for checking the afterimage of the image.

[0413] The second memory (152) can store data necessary for various embodiments.

[0414] The second memory (152) may be implemented in the form of a memory embedded in the display device (100) or in the form of a memory that can be attached to the display device (100) depending on the purpose of data storage. For example, data for driving the display device (100) may be stored in a memory embedded in the display device (100), and data for the expansion function of the display device (100) may be stored in a memory that can be attached to the display device (100).

[0415] Meanwhile, the memory embedded in the display device (100) may be implemented as at least one of volatile memory (e.g., DRAM (dynamic RAM), SRAM (static RAM), or SDRAM (synchronous dynamic RAM), non-volatile memory (e.g., OTPROM (one time programmable ROM), PROM (programmable ROM), EPROM (erasable and programmable ROM), EEPROM (electrically erasable and programmable ROM), mask ROM, flash ROM, flash memory (e.g., NAND flash or NOR flash), hard drive, or solid state drive (SSD).

[0416] In addition, the memory that can be attached to and detached from the display device (100) may be implemented in the form of a memory card (e.g., CF (compact flash), SD (secure digital), Micro-SD (micro secure digital), Mini-SD (mini secure digital), xD (extreme digital), MMC (multi-media card), etc.) or an external memory that can be connected to a USB port (e.g., USB memory), but is not limited thereto.

[0417] The second memory (152) may include one or more memory chips or one or more memory blocks.

[0418] At least one component may be added or removed in response to the performance of the components of the display device illustrated in FIG. 14. Additionally, it will be readily understood by those skilled in the art that the relative positions of the components may be changed in response to the performance or structure of the system.

[0419] Meanwhile, each component illustrated in FIG. 14 refers to a software and / or hardware component such as a Field Programmable Gate Array (FPGA) and an Application Specific Integrated Circuit (ASIC).

[0420] FIG. 15 is a control flowchart of an analysis device that primarily corrects the overdrive table of a display device according to one embodiment.

[0421] The analysis device can transmit request information requesting identification information of the display device (100) to the display device, and when the identification information of the display device is received from the display device (100), it can recognize an overdrive table provided in the display device (100) from a server or a first memory.

[0422] The analysis device can transmit request information requesting an overdrive table to the display device, and it is also possible to receive the overdrive table of the display device from the display device.

[0423] The analysis device can transmit a display command of the first test image to the display device (501).

[0424] Transmitting a display command for the first test sheet image may include transmitting an execution command for the first program.

[0425] When display control information for the first test image is received from the display device, the analysis device can acquire a first analysis image of the first test image displayed on the display device using the first image sensor (210) (502). At this time, the analysis device can acquire the first analysis image in real time.

[0426] The analysis device can receive information about the initial time of the start of the test from the display device.

[0427] The analysis device can recognize the response time for each gray value when changing from a gray image with one gray value to a gray image with another gray value based on the initial time, the first reference time, and the acquired first analysis image (503).

[0428] Other gray values ​​may be larger or smaller than a single gray value.

[0429] The analysis device can receive information about the initial time of the start of the test from the display device.

[0430] For example, the analysis device may recognize a first response time at which the first gray image is displayed based on an initial time and a time at which the first gray image is recognized, recognize a second response time at which the first gray image changes to the second gray image based on an initial time, a first reference time, and a time at which the second gray image is recognized, and recognize a third response time at which the second gray image changes to the third gray image based on an initial time, a first reference time, and a time at which the third gray image is recognized.

[0431] In this way, the analysis device can obtain a response time table for response times by gray value.

[0432] The analysis device can recognize the average response time for each recognized response time and recognize the reference response time based on the recognized average response time (504).

[0433] Here, the reference response time can be the average response time, or a response time that is lower than the average response time by a certain amount. The certain amount of time can be a preset time.

[0434] The analysis device may also receive a reference response time from the first input unit (250).

[0435] The analysis device can recognize a reference response time range based on the reference response time. For example, the reference response time range may include a range from 0 to the reference response time.

[0436] The analysis device can identify whether the recognized response times are less than or equal to the reference response time (505).

[0437] Identifying whether the recognized response times are less than or equal to the reference response time may include identifying whether the response times in the response time table are less than or equal to the reference response time.

[0438] Based on the fact that at least one of the recognized response times is identified as exceeding the reference response time, the analysis device recognizes at least one response time among the recognized response times that exceeds the reference response time (506), recognizes at least one set voltage corresponding to the recognized at least one response time (507), and can correct the recognized at least one set voltage (508).

[0439] The analysis device recognizes at least one response time greater than a reference response time among the recognized response times, recognizes at least one initial gray value and at least one change gray value corresponding to the recognized at least one response time, recognizes a set voltage when changing from the recognized at least one initial gray value to the at least one change gray value, and can correct the recognized set voltage.

[0440] For example, the case where the reference response time is 1.4 ms is described with reference to FIG. 13. The analysis device recognizes at least one response time greater than the reference response time, such as 5.2 ms, 5.6 ms, and 5.7 ms, recognizes the a-gray value and b-gray value for each recognized response time, recognizes all set voltages when changing from the initial gray value to the changed gray value for each response time, and can correct all recognized set voltages.

[0441] The initial gray value is the first gray value, and the change gray value may include the second, third, fourth, fifth, and sixth gray values. At this time, when changing from the initial gray value of the analysis device to the change gray value, all setting voltages can be corrected by increasing them by a certain voltage increment.

[0442] As another example, the analysis device recognizes a plurality of response times that are smaller than a reference response time among the recognized response times, recognizes at least one response time among the recognized plurality of response times that has the smallest difference from the reference response time, recognizes at least one initial gray value and at least one change gray value corresponding to the recognized at least one response time, recognizes a set voltage corresponding to the recognized at least one initial gray value and at least one change gray value, and can correct the recognized set voltage.

[0443] For example, the case where the reference response time is 1.4 ms is described with reference to FIG. 11. The analysis device recognizes multiple response times of 0.5 ms, 0.6 ms, and 0.7 ms that are smaller than the reference response time, recognizes the response time of 0.7 ms that has the smallest difference from the reference response time among the recognized response times, recognizes an initial gray value and a changed gray value corresponding to the recognized response time of 0.7 ms, recognizes the set voltage when changing from the initial gray value to the changed gray value, and can correct the recognized set voltage.

[0444] Since the initial gray value is greater than the changed gray value, the analysis device can perform polling overdrive control corresponding to the decrease in the gray value. That is, the analysis device can correct the recognized set voltage to be lower by a certain voltage.

[0445] As another example, the analysis device recognizes the maximum response time among the recognized response times, recognizes the initial gray value and the change gray value corresponding to the recognized maximum response time, recognizes the set voltage for the recognized initial gray value and the change gray value, and can also correct each of the recognized set voltages.

[0446] Whenever the analysis device corrects the overdrive table based on the response time, it can transmit the corrected overdrive table to the display device and transmit a command to display the first test image through the corrected overdrive table to the display device.

[0447] The analysis device can repeat the process of acquiring a first analysis image when display control information of a first test image is received from a display device, and correcting at least one set voltage in an overdrive table based on the acquired first analysis image until all recognized response times become less than or equal to a reference response time.

[0448] That is, the analysis device can repeat the correction of at least one set voltage until all recognized response times become less than or equal to the reference response time.

[0449] The analysis device can complete the correction of the overdrive table by completing the correction of at least one set voltage based on the fact that all recognized response times are less than or equal to the reference response time (509).

[0450] FIG. 16 is a control flowchart of an analysis device that secondarily corrects the overdrive table of a display device according to one embodiment.

[0451] The analysis device can transmit a command to display the second test image to the display device (511).

[0452] Transmitting a display command for the second test sheet image may include transmitting an execution command for the second program.

[0453] When display control information for the second test image is received from the display device, the analysis device can use the second image sensor (220) to acquire the second test image displayed on the display device as the second analysis image (512).

[0454] The analysis device can analyze the second analysis image received in real time from the second image sensor (220) using artificial intelligence and recognize the image quality based on the analysis result (513).

[0455] Recognizing the image quality may include recognizing whether the image quality is in a normal state or an abnormal state.

[0456] More specifically, when the analysis device analyzes a second analysis image received in real time, it recognizes changes in a plurality of block images displayed on a display device and can recognize whether the image quality is in a normal state or an abnormal state based on the recognized changes in the plurality of block images.

[0457] Recognizing changes in multiple block images may include recognizing changes in character images within multiple block images.

[0458] Recognizing changes in multiple block images allows recognizing whether at least one of color distortion, inverse afterimage, and afterimage occurs in at least one block image when a character image within multiple block images changes.

[0459] That is, the analysis device can identify whether there is an abnormal block image (514).

[0460] If the analysis device identifies that an abnormal block image exists, it can recognize at least one of the discoloration, inverse afterimage, and afterimage generated in the abnormal block image.

[0461] That is, the analysis device can recognize abnormal state information for the block image in an abnormal state (515).

[0462] If there are multiple block images in an abnormal state, the analysis device can recognize abnormal state information for each block image in an abnormal state.

[0463] The analysis device can recognize the gray value of the background image of the abnormal block image and the gray value of the character projection (516).

[0464] The analysis device can recognize a set voltage based on abnormal state information for an abnormal state block image, a gray value of the background image of an abnormal state block image, and a gray value of a character projection (517), and correct the recognized set voltage (518).

[0465] This will be explained with reference to Fig. 12.

[0466] The analysis device can recognize a color block image (s1, s2) in which a color is recognized based on color recognition, recognize an inverse afterimage block image (s3, s4) in which an inverse afterimage is recognized based on inverse afterimage recognition, and recognize an afterimage block image (s5, s6) in which an afterimage is recognized based on afterimage recognition.

[0467] The analysis device recognizes the gray value of the background image and the gray value of the character image of the recognized colored block image, recognizes a set voltage corresponding to the change from the gray value of the background image to the gray value of the character image, and can correct the recognized set voltage.

[0468] The analysis device recognizes the gray values ​​of the background image and the character image of the recognized inverse afterimage block image, and can correct the set voltage by increasing the set voltage by a certain amount based on the gray values ​​of the recognized character image and the background image.

[0469] More specifically, the analysis device recognizes a relatively higher gray value and a relatively lower gray value among the gray values ​​of the recognized character image and the background image, recognizes the higher gray value as the initial gray value and the lower gray value as the change gray value, recognizes a set voltage corresponding to the initial gray value and the change gray value, and can correct the recognized set voltage by increasing the recognized set voltage by a certain amount.

[0470] The analysis device recognizes the gray values ​​of the background image and the character image of the recognized afterimage block image, and can correct the set voltage by increasing the set voltage by a certain amount based on the gray values ​​of the background image and the character image.

[0471] More specifically, the analysis device recognizes a relatively higher gray value and a relatively lower gray value among the gray values ​​of the recognized character image and the background image, recognizes the lower gray value of the two as the initial gray value and the higher gray value of the two as the change gray value, recognizes the set voltage when changing from the initial gray value to the change gray value, and can correct the recognized set voltage by increasing the recognized set voltage by a certain amount.

[0472] The analysis device can correct the overdrive table based on image quality.

[0473] Whenever the analysis device corrects the overdrive table based on image quality, it can transmit the corrected overdrive table to the display device and transmit a command to display a second test image through the corrected overdrive table to the display device.

[0474] The analysis device can repeat the process of acquiring a second analysis image when display control information of a second test image is received from a display device until the image quality reaches a normal state, and correcting at least one set voltage in an overdrive table based on the acquired second analysis image.

[0475] The analysis device can recognize the image quality as normal based on the fact that afterimages, inverse afterimages, and color distortions are not recognized within a plurality of block images, and can complete the correction of the overdrive table (519).

[0476] The analysis device can finally transmit the corrected overdrive table to the display device.

[0477] FIG. 17 is a control configuration diagram of a display device according to another embodiment.

[0478] To maintain consistency with the terminology of the first embodiment, the second and third programs and the second test video are described without describing the first program and the first test video.

[0479] A display device according to another embodiment can communicate with a user device (300).

[0480] A display device according to another embodiment may include a display panel (120), a second input unit (130), a second communication unit (140), and a second control unit (160).

[0481] The display panel (120) and the second input unit (130) of the display device according to another embodiment are identical to the display panel (120) and the second input unit of one embodiment, so a description is omitted.

[0482] The second communication unit (140) can communicate with the user device (300).

[0483] If a third program is provided in the user device, the second communication unit (140) can receive a corrected overdrive table from the user device (300) and transmit the received overdrive table to the second control unit (160).

[0484] Here, the third program may be a program for image quality analysis.

[0485] When a third program is provided in the user device (300), the second communication unit (140) can transmit the identification information of the display device to the user device (300) based on receiving request information for the identification information of the display device from the user device (300).

[0486] In the case where the third program is not provided in the user device (300) and the third program is provided in the display device, the second communication unit (140) may receive the second analysis image from the user device (300) and transmit the received second analysis image to the second control unit (160).

[0487] The second communication unit (140) can receive a display command for the second test image from the user device (300) and transmit the received display command for the second test image to the second control unit (160).

[0488] The second communication unit (140) can transmit at least one of the received second program and third program to the second control unit (160) based on receiving at least one of the second program and third program from the user device (300).

[0489] The second communication unit (140) can transmit at least one execution command of the second program and the third program received from the user device (300) to the second control unit (160).

[0490] In addition, the configuration of the second communication unit (140) is the same as that of the second communication unit of one embodiment, so the description is omitted.

[0491] A case where the third program is not provided in the second control unit (160) is described.

[0492] The second control unit (160) can transmit the identification information of the display device to the user device when it receives request information for the identification information of the display device from the user device (300).

[0493] The second control unit (160) can control the display panel so that the second test image is displayed when it receives a command to execute the second program or a command to display the second test image from the user device (300).

[0494] When the second control unit (160) receives a corrected overdrive table from the user device (300), it can update the overdrive table stored in the second memory using the received overdrive table.

[0495] A case in which a third program is provided in the second control unit (160) is described.

[0496] The second control unit (160) can recognize the image quality based on the second analysis image received from the user device (300).

[0497] The second control unit (160) can recognize the image quality based on the second analysis image received in real time from the user device (300). The second control unit (160) can analyze the image using the third program and recognize the image quality based on the image analysis result.

[0498] The second control unit (160) can recognize changes in multiple block images through image analysis and recognize whether the image quality is in a normal state or an abnormal state based on the recognized changes in multiple block images.

[0499] The change of multiple block images may include the change of multiple character images within multiple background images.

[0500] The image quality may include at least one of afterimage, inverse afterimage, and color distortion. Color distortion may include a state in which a color different from the target color is displayed.

[0501] The second control unit (160) can recognize the image quality as abnormal based on the recognition of at least one of afterimage, inverse afterimage, and discoloration within a plurality of block images.

[0502] The second control unit (160) can recognize abnormal state information for an abnormal block image.

[0503] If there are multiple block images in an abnormal state, the analysis device can recognize abnormal state information for each block image in an abnormal state.

[0504] The second control unit (160) can correct the overdrive table of the display device based on the recognition of at least one of afterimage, inverse afterimage, and color distortion within a plurality of block images.

[0505] More specifically, the second control unit (160) recognizes the gray value of the background image of the abnormal block image and the gray value of the character projection, recognizes the set voltage based on the abnormal state information for the abnormal block image, the gray value of the background image of the abnormal block image, and the gray value of the character projection, and can correct the recognized set voltage. This configuration is identical to that of one embodiment, so a detailed description is omitted.

[0506] The second control unit (160) can correct the overdrive table based on the image quality.

[0507] Whenever the second control unit (160) corrects the overdrive table based on image quality, it can transmit the corrected overdrive table to the display device and transmit a command to display the second test image through the corrected overdrive table to the display device.

[0508] The second control unit (160) can repeat the process of acquiring a second analysis image and correcting at least one set voltage in an overdrive table based on the acquired second analysis image when display control information of a second test image is received from a display device until the image quality becomes normal.

[0509] The second control unit (160) can recognize the image quality as normal based on the fact that afterimages, inverse afterimages, and color distortions are not recognized within a plurality of block images, and can complete the correction of the overdrive table.

[0510] The second control unit (160) can finally transmit the corrected overdrive table to the display device.

[0511] The second control unit (160) may include at least one second processor (161) for controlling the operation of the display device (100) and at least one second memory (162) for storing a program and data for controlling the operation of the display device (100).

[0512] At least one second processor (161) may include an algorithm for controlling the operation of components within the display device (100), at least one memory for storing data in the form of a program, and one or more processor chips that perform the aforementioned operation using the data stored in at least one memory, or one or more processing cores.

[0513] At least one second processor (161) can process various data and various signals using instructions, data, programs and / or software stored in the second memory (162).

[0514] At least one second processor (161) may include one or more of a CPU (Central Processing Unit), GPU (Graphics Processing Unit), APU (Accelerated Processing Unit), MIC (Many Integrated Core), DSP (Digital Signal Processor), NPU (Neural Processing Unit), hardware accelerator, or machine learning accelerator.

[0515] The configuration of the second memory (162) is the same as the configuration of the second memory (152) shown in FIG. 14, so a detailed description is omitted.

[0516] The user device (300) can transmit a command to execute the second program or a command to display the second test video to the display device (100).

[0517] The user device (300) may include an image sensor that acquires an image displayed on the display device (100).

[0518] That is, the user device (300) can acquire the second test image displayed on the display device (100) as the second analysis image.

[0519] If the third program is not provided in the user device (300), the user device (300) can transmit the second analysis image acquired by the image sensor to the display device (100).

[0520] The user device (300) may also include a third program. The third program may be a program for analyzing the quality of an image displayed on a display device (100).

[0521] Hereinafter, the operation of the user device is described in the case where a third program is provided in the user device (300).

[0522] The user device (300) requests an overdrive table from the display device, and when the overdrive table is received from the display device, the received overdrive table can be stored.

[0523] The user device (300) can recognize whether the image quality displayed on the display device (100) is in a normal state or an abnormal state based on the second analysis image acquired by the image sensor.

[0524] The user device (300) can recognize an abnormal block image if it recognizes that the image quality displayed on the display device (100) is abnormal.

[0525] The user device (300) can recognize whether the abnormal block image is an abnormal block image due to color distortion, an abnormal block image due to inverse afterimage, or an abnormal block image due to afterimage. That is, the user device (300) can recognize abnormal state information regarding the abnormal block image.

[0526] The user device (300) recognizes the gray value of the background image of the recognized block image and the gray value of the character image, and can correct the set voltage based on the recognized abnormal state information, the gray value of the recognized background image and the gray value of the character image.

[0527] The configuration for correcting the set voltage based on recognized abnormal state information, the gray value of the recognized background image, and the gray value of the character image is identical to the configuration for correcting the set voltage based on recognized abnormal state information, the gray value of the recognized background image, and the gray value of the character image in one embodiment, so a description is omitted.

[0528] The user device (300) can correct the overdrive table received from the display device based on the correction of the set voltage and transmit the corrected overdrive table to the display device (100).

[0529] The user device (300) can be carried by the user or placed in the user's home or office, etc.

[0530] The user device (300) can be implemented as a computer or portable terminal that can connect to an external device through a network.

[0531] Here, a computer may include, for example, a notebook, desktop, laptop, tablet PC, slate PC, etc. equipped with a web browser, but is not limited thereto.

[0532] A portable terminal is a wireless communication device that ensures portability and mobility, and may include all kinds of handheld-based wireless communication devices such as PCS (Personal Communication System), GSM (Global System for Mobile communications), PDC (Personal Digital Cellular), PHS (Personal Handyphone System), PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication)-2000, CDMA (Code Division Multiple Access)-2000, W-CDMA (W-Code Division Multiple Access), WiBro (Wireless Broadband Internet) terminals, smartphones, etc., as well as wearable devices such as watches, rings, bracelets, anklets, necklaces, glasses, contact lenses, or head-mounted devices (HMDs).

[0533] The user device (300) may include a communication module capable of communicating with a display device (100), a user interface that receives user input or outputs information to the user, at least one processor that controls the operation of the user device (300), and at least one memory in which a program for controlling the operation of the user device (300) is stored.

[0534] A program, i.e., an application, for improving the response speed of a display device can be stored in the memory of the user device (300). The application may be sold with the user device (300) installed, or may be downloaded and installed from a server (not shown).

[0535] In addition, it is possible to store a program, i.e., an application, for controlling the display device (100) in the memory of the user device (300).

[0536] By running an application installed on the user device (300), the user can connect to a server (not shown) to create a user account and communicate with the server (not shown) based on the logged-in user account.

[0537] A user device (300) can register a display device (100) through a server. For example, if the display device (100) is operated to connect to the server according to the procedure guided by an application installed on the user device (300), the display device (100) can be registered to the user account by the server registering the identification information of the display device (100) (e.g., serial number or MAC address, etc.) to the corresponding user account.

[0538] Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium that stores instructions executable by a computer. The instructions may be stored in the form of program code and, when executed by a processor, may generate a program module to perform the operation of the disclosed embodiments. The recording medium may be implemented as a computer-readable recording medium.

[0539] Computer-readable recording media include all types of recording media that store instructions that can be decoded by a computer. Examples include ROM (Read Only Memory), RAM (Random Access Memory), magnetic tape, magnetic disk, flash memory, optical data storage devices, etc.

[0540] As described above, the disclosed embodiments have been explained with reference to the attached drawings. Those skilled in the art will understand that the present invention may be practiced in forms different from the disclosed embodiments without changing the technical spirit or essential features of the invention. The disclosed embodiments are illustrative and should not be interpreted restrictively.

Claims

1. A communication unit that communicates with a display device; A sensor for acquiring an image of a test image displayed on the above-mentioned display device; Based on a first image for a first test image acquired by the sensor and a second image for a second test image acquired by the sensor, a plurality of response times corresponding to the time when a plurality of first gray values ​​change to a plurality of second gray values ​​are recognized, and A control unit that controls a communication unit to transmit the recognized information to the display device in order to recognize information corresponding to the correction of the overdrive table of the display device based on the difference between the above-recognized multiple response times and a reference response time, and to correct the overdrive table of the display device based on the above-recognized information. An analysis device wherein the first image includes a plurality of first gray values ​​displayed on the display device, the second image includes a plurality of second gray values ​​displayed on the display device, and each of the plurality of second gray values ​​of the second image corresponds to each of the plurality of first gray values ​​but is a different value.

2. In claim 1, the control unit is, An analysis device that recognizes identification information of the display device, recognizes the original overdrive table of the display device based on the recognized identification information of the display device, and applies information corresponding to the correction to correct the recognized original overdrive table.

3. In claim 2, the control unit is, An analysis device further comprising: recognizing at least one response time that exceeds the reference response time among the plurality of recognized response times; recognizing a first gray value among the plurality of first gray values ​​corresponding to the at least one recognized response time and a second gray value among the plurality of second gray values; recognizing a set voltage corresponding to the recognized first gray value and the recognized second gray value in the original overdrive table; correcting the original overdrive table by increasing the recognized set voltage by a first voltage based on the fact that the recognized first gray value is smaller than the recognized second gray value; and correcting the original overdrive table by decreasing the set voltage by a second voltage based on the fact that the recognized first gray value is larger than the recognized second gray value.

4. In Paragraph 1, It further includes an input section, The above-described control unit further comprises receiving the reference response time from the above-described input unit.

5. In claim 1, the control unit is, An analysis device further comprising recognizing an average response time for a plurality of recognized response times and recognizing a reference response time based on the recognized average response time.

6. In Paragraph 1, The above sensor includes a first sensor, and The recognized information corresponding to the correction of the over table of the display device is the recognized first information, and It further includes a second sensor for acquiring an image of a test image displayed on the display device; and The above control unit controls the communication unit to transmit the recognized first information to the display device so that a first correction of the overdrive table of the display device is performed based on the recognized first information, based on the fact that the recognized plurality of response times are less than or equal to the reference response time, and the analysis device that controls the communication unit to transmit the recognized second information to the display device in order to recognize the quality of the third image based on the third image of the third test image displayed on the display device acquired by the second sensor, recognize second information corresponding to the correction of the first corrected overdrive table based on the recognized quality, and correct the first corrected overdrive table based on the recognized second information.

7. In claim 6, the control unit is, An analysis device that recognizes at least one of afterimage, inverse afterimage, and discoloration based on a third image acquired by the second sensor, recognizes a block image in which at least one of the afterimage, inverse afterimage, and discoloration is recognized, recognizes a gray value of the background image of the recognized block image and a gray value of the character image of the recognized block image, recognizes a set voltage corresponding to the gray value of the recognized background image and the gray value of the recognized character image in the first corrected override table, recognizes a ratio of at least one of the afterimage, inverse afterimage, and discoloration for the character image in the block image, and, based on the recognized ratio exceeding a reference ratio, recognizes second information including a correction to the set voltage of the first corrected overdrive table so that the set voltage of the first corrected overdrive table is corrected based on the recognized second information.

8. In Paragraph 1, The above sensor includes a first sensor, and The recognized information corresponding to the correction of the overdrive table of the display device is the recognized first information, and The above communication unit further performs communication with a user device that acquires an image of a test image displayed on the display device, and The above control unit controls the communication unit to transmit the recognized first information to the display device so that a first correction to the overdrive table of the display device is performed based on the recognized first information, recognizes the quality of the third image based on the third image acquired by the user device, recognizes second information corresponding to the correction of the overdrive table that has been first corrected based on the recognized quality, and controls the communication unit to transmit the recognized second information to the display device so that the overdrive table that has been first corrected is corrected based on the recognized second information.

9. A communication unit that communicates with an external device; A display panel comprising a liquid crystal portion in which the arrangement of liquid crystal molecules is changed by a voltage applied to an electrode portion, and which displays a gray image having at least one gray value among a plurality of gray values ​​by changing the arrangement of the liquid crystal molecules; A memory storing an overdrive table comprising a target voltage corresponding to each of the plurality of gray values ​​and a plurality of setting voltages for changing from a first gray value to a second gray value for each of the plurality of gray values; and Based on a change in the gray value of an image displayed through the display panel, a first gray value and a second gray value changed from the first gray value among the plurality of gray values ​​are recognized, a target voltage corresponding to the second gray value is recognized, a set voltage corresponding to the recognized first gray value and the second gray value is recognized from the overdrive table, and after controlling the set voltage to be applied to the electrode part, the target voltage is controlled to be applied to the electrode part. A display device that corrects an overdrive table stored in the memory in response to receiving information for correcting an overdrive table from the above external device.

10. In claim 9, the control unit is, A display device further comprising controlling the display panel to display a first image and a second image based on a command for correction of the stored overdrive table received from the external device.

11. In claim 9, the external device is, A display device comprising an analysis device that analyzes the response time of a liquid crystal of the display panel and analyzes the image quality of the display panel, or a user device that acquires an image of the display panel, or a combination of the analysis device and the user device.

12. A method for controlling an analysis device comprising a communication unit communicating with a display device, a sensor and a control unit for acquiring an image of a test image displayed on the display device, wherein the control unit, by means of Recognizing the identification information of the above display device, Based on the identification information of the above-recognized display device, the original overdrive table of the display device is recognized, and A first image for a first test image displayed on the display device is obtained through the sensor, and a second image for a second test image displayed on the display device is obtained through the sensor. Based on the first image and the second image obtained above, a plurality of response times when changing from a plurality of first gray values ​​to a plurality of second gray values ​​are each recognized, and Based on the difference between the above-recognized multiple response times and the reference response time, information corresponding to the correction of the original overdrive table of the display device is recognized, and Based on the above recognized information, the recognized information is transmitted to the display device to correct the original overdrive table of the display device, and A method for controlling an analysis device, wherein the first image includes a plurality of first gray values ​​displayed on the display device, the second image includes a plurality of second gray values ​​displayed on the display device, and each of the plurality of second gray values ​​of the second image corresponds to each of the plurality of first gray values ​​but is a different value.

13. In claim 12, correcting the original overdrive table of the display device is performed by the control unit, Among the above-recognized multiple response times, at least one response time that exceeds the reference response time is recognized, and Recognizing a first gray value among the plurality of first gray values ​​and a second gray value among the plurality of second gray values ​​corresponding to at least one recognized response time, Recognizing the set voltage corresponding to the first gray value and the second gray value in the original overdrive table above, A control method for an analysis device comprising: correcting the original overdrive table by increasing the recognized set voltage by a first voltage based on the fact that the first gray value is smaller than the second gray value, or correcting the original overdrive table by decreasing the set voltage by a second voltage based on the fact that the recognized first gray value is larger than the recognized second gray value.

14. In Paragraph 12, The above sensor includes a first sensor, and The recognized information corresponding to the correction of the over table of the display device is the recognized first information, and the analysis device further includes a second sensor that acquires an image for a test image displayed on the display device. By the above control unit, Control the communication unit to transmit the recognized first information to the display device so that a first correction of the overdrive table of the display device is performed based on the recognized first information, based on the fact that the recognized plurality of response times are less than or equal to the reference response time. A third image for a third test image displayed on the display device is obtained through the second sensor, and Based on the third image above, the image quality of the third image is recognized, and Based on the above-mentioned recognized image quality, second information corresponding to the correction of the above-mentioned first-corrected overdrive table is recognized, and A control method for an analysis device further comprising transmitting the recognized second information to the display device in order to correct the first corrected overdrive table based on the recognized second information.

15. In claim 14, correcting the primary corrected overdrive table based on the recognized image quality is, Based on the third image acquired by the second sensor, at least one of afterimage, inverse afterimage, and discoloration is recognized, and Recognize a block image in which at least one of the above afterimage, inverse afterimage, and color is recognized, and Recognize the gray values ​​of the background image and the character image of the above-mentioned recognized block image, and Recognize the set voltage corresponding to the gray value of the recognized background image and the gray value of the recognized character image in the above primary corrected overdrive table, and Recognizing at least one ratio of afterimage, inverse afterimage, and discoloration for the character image in the block image above, and A control method for an analysis device comprising recognizing second information including a correction to the set voltage of the first corrected overdrive table based on the recognized second information based on the fact that the recognized ratio exceeds a reference ratio.

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