WO2021137339A1 - Dispositif d'affichage d'image et son procédé de fonctionnement - Google Patents

Dispositif d'affichage d'image et son procédé de fonctionnement Download PDF

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Publication number
WO2021137339A1
WO2021137339A1 PCT/KR2020/000097 KR2020000097W WO2021137339A1 WO 2021137339 A1 WO2021137339 A1 WO 2021137339A1 KR 2020000097 W KR2020000097 W KR 2020000097W WO 2021137339 A1 WO2021137339 A1 WO 2021137339A1
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WO
WIPO (PCT)
Prior art keywords
image
display panel
area
display
rolled
Prior art date
Application number
PCT/KR2020/000097
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English (en)
Korean (ko)
Inventor
구선본
장해원
강동현
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to PCT/KR2020/000097 priority Critical patent/WO2021137339A1/fr
Publication of WO2021137339A1 publication Critical patent/WO2021137339A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters

Definitions

  • the present invention relates to a video display device and an operating method thereof.
  • An image display device is a device having a function of displaying an image that a user can watch.
  • LCD Liquid Crystal Display Device
  • PDP Plasma Display Panel
  • ELD Electro luminescent Display
  • VFD Vauum Fluorescent Display
  • an image display device using an organic light emitting diode has superior luminance and viewing angle characteristics compared to an image display device such as LCD, and does not require a backlight unit, so it can be implemented in an ultra-thin shape. There are advantages.
  • the flexible display panel including the organic light emitting diode (OLED) is formed on a substrate made of a material having flexibility such as polyimide, it can be bent or wound on a roller. , by using a flexible display panel, it is possible to implement an image display device that is wound or unfolded on a roller.
  • OLED organic light emitting diode
  • a driving element such as a thin film transistor (TFT) for controlling the current flowing through the organic light emitting diode (OLED) is provided for each pixel of the display panel.
  • TFT thin film transistor
  • the electric characteristics of the driving elements are the same in all pixels, but the electric characteristics of the driving elements may not be uniform due to process conditions, driving environment, etc.
  • the organic light emitting diode (OLED) may deteriorate.
  • a screen displayed on a display panel is photographed through an external measuring device and color correction is performed by detecting an area with non-uniform luminance through color coordinate analysis of each area of the screen, or a driving element or an organic light emitting diode ( The voltage applied to the OLED) is sensed, and compensation for afterimage removal is performed by checking the degree of change or deterioration of the electrical characteristics of each device.
  • the conventional image display apparatus determines the state of the display panel according to a user input or a preset time interval and performs an operation for color correction or afterimage compensation, but this operation is not periodically performed by the user. Otherwise, when the preset time interval is long, there is a problem in that the possibility of problems such as generation of bad pixels or afterimages increases.
  • the present invention aims to solve the above and other problems.
  • Another object of the present invention is to provide an image display device capable of determining the state of the display panel using a built-in image sensor when the display panel is rolled up or rolled down, and an operating method thereof.
  • an image display device includes a housing, a roller disposed inside the housing, and a plurality of pixels, and a display panel wound or unwound on the roller, so as to face the display panel
  • An image sensor disposed inside the housing and a control unit for controlling the operation of the roller so that the display panel is rolled up or rolled down, wherein the control unit is configured to cause the display panel to roll-up
  • a preset image is displayed through at least one area of the display panel that is not exposed to the outside of the housing, a sensing signal is received from the image sensor while the preset image is displayed, and based on the sensing signal It is possible to determine the state of the display panel.
  • the operation of generating a sensing signal by at least one image sensor included in the image display device while the preset image is displayed, and the sensing signal and the at least one image sensor may be disposed inside the housing of the image display device to face the display panel.
  • the state of the display panel is determined using an image sensor built into the image display device, and when a problem occurs, the user can display It is possible to immediately perform an operation according to the state of the display panel before recognizing the abnormal state of the panel, thereby improving the user's reliability and satisfaction with the performance and quality of the product.
  • FIG. 1 and 2 are diagrams illustrating an image display device having a rollable display according to an embodiment of the present invention.
  • 3 to 5B are diagrams illustrating examples of configurations included in an image display device according to various embodiments of the present disclosure.
  • FIG 6 is an example of an internal block diagram of an image display device according to an embodiment of the present invention.
  • FIG. 7 is an example of an internal block diagram of the display of FIG. 6 .
  • FIG. 8 is an example of a flowchart of a method of operating an image display apparatus according to an embodiment of the present invention.
  • 9A and 9B are an example of a flowchart of a method of operating an image display apparatus according to an embodiment of the present invention.
  • 10A to 14C are diagrams referenced for explaining an operating method of an image display apparatus according to various embodiments of the present disclosure.
  • module and “part” for the components used in the following description are given simply in consideration of the ease of writing the present specification, and do not give a particularly important meaning or role by themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.
  • FIG. 1 and 2 are diagrams illustrating an image display device having a rollable display according to an embodiment of the present invention.
  • the image display device 100 may be a device that processes and outputs an image.
  • the video display device 100 is not particularly limited as long as it can display a screen corresponding to a video signal, such as a TV or a monitor.
  • the image display apparatus 100 may receive a broadcast signal, process it, and output a signal-processed broadcast image.
  • the image display device 100 may correspond to a broadcast reception device.
  • the image display device 100 may receive a broadcast signal wirelessly through an antenna, or may receive a broadcast signal through a wire through a cable.
  • the image display apparatus 100 may receive a terrestrial broadcast signal, a satellite broadcast signal, a cable broadcast signal, an Internet Protocol Television (IPTV) broadcast signal, and the like.
  • a terrestrial broadcast signal a satellite broadcast signal
  • a cable broadcast signal a cable broadcast signal
  • IPTV Internet Protocol Television
  • the image display device 100 may include a display 20 and a housing 30 .
  • the housing 30 may have an internal space, and at least a portion of the display 20 may be located inside the housing 30 . At least a portion of the display 20 may be located outside the housing 30 .
  • An opening may be formed on one surface of the housing 30 , and at least a portion of the display 20 may be exposed to the outside of the housing 30 through the opening.
  • a direction parallel to the longitudinal direction of the housing 30 may be referred to as a first direction DR1 , a +x-axis direction, a -x-axis direction, a left direction, or a right direction.
  • a direction in which the display 20 displays a screen may be referred to as a +z axis, a forward direction, or a forward direction.
  • a direction opposite to the direction in which the display 20 displays the screen may be referred to as a -z axis, a rearward direction, or a rearward direction.
  • the third direction DR3 may be parallel to the +z-axis direction or the -z-axis direction.
  • a direction parallel to the height direction of the display device 100 may be referred to as a second direction DR2 , a +y-axis direction, a -y-axis direction, an upper direction, or a lower direction.
  • the third direction DR3 may be a direction perpendicular to the first direction DR1 and/or the second direction DR2 .
  • the first direction DR1 and the second direction DR2 may be collectively referred to as a horizontal direction.
  • the third direction DR3 may be referred to as a vertical direction.
  • the left-right direction LR may be parallel to the first direction DR1
  • the vertical direction UD may be parallel to the second direction DR2 .
  • the degree to which at least a portion of the display 20 is exposed to the outside of the housing 30 may be adjusted as necessary.
  • the display 20 may display an image.
  • the display 20 may display an image through at least a partial area exposed to the outside of the housing 30 among the entire area.
  • the display 20 may be a rollable display including a flexible display panel (not shown).
  • the display 20 may include an organic light emitting panel formed of an organic light emitting diode (OLED).
  • OLED organic light emitting diode
  • a roller 143 (refer to FIG. 4A ) on which the rollable display is wound and a motor (not shown) rotating the roller 143 may be located inside the housing 30 .
  • the display 20, according to the rotation of the roller 143 may be rolled-up (roll up) or roll-down (roll down), through the roll-up or roll-down of the display (20) , a size of an area exposed to the outside of the housing 30 (hereinafter, referred to as an exposed area) among the entire area of the display 20 may be adjusted.
  • the image display apparatus 100 may adjust the size of an exposure area among the entire area of the display 20 according to a mode.
  • the image display device 100 may allow the display 20 to be wound on a roller positioned inside the housing 30 so that the display 20 is not exposed to the outside of the housing 30 through the opening.
  • the zero view mode refers to a mode in which the display 20 is not exposed to the outside of the housing 30 and only some components of the image display device 100 (eg, the audio output unit 285 of FIG. 6 ) are operated. can mean
  • the display 20 is rolled up according to the rotation of the roller 143 , and a portion of the entire area of the display 20 may be exposed to the outside of the housing 30 .
  • the image display apparatus 100 may display an image through a portion of the entire area of the display 20 exposed to the outside of the housing 30 in a line view mode.
  • the line view mode may refer to a mode in which only a portion of the entire area of the display 20 is exposed to the outside of the housing 30 .
  • the display 20 is rolled up according to the rotation of the roller 143 , so that the entire area of the display 20 may be exposed to the outside of the housing 30 .
  • the image display apparatus 100 may display an image through the entire area of the display 20 exposed to the outside of the housing 30 in a full view mode.
  • the full view mode may refer to a mode in which the entire area of the display 20 is exposed to the outside of the housing 30 .
  • 3 to 5B are diagrams illustrating examples of configurations included in an image display device according to various embodiments of the present disclosure.
  • the display 20 may include a display panel 10 and a plate 15 .
  • the display panel 10 may be flexible.
  • the display panel 10 may be an organic light emitting display panel including an organic light emitting diode (OLED).
  • OLED organic light emitting diode
  • the display panel 10 may have a front surface for displaying an image.
  • the display panel 10 may have a rear surface opposite to the front surface.
  • the front surface of the display panel 10 may be covered with a light-transmitting material.
  • the light-transmitting material may be a synthetic resin or a film.
  • the plate 15 may be coupled, fastened, or attached to the rear surface of the display panel 10 .
  • the plate 15 may include a metal material.
  • the plate 15 may be referred to as a module cover 15 , a cover 15 , a display panel cover 15 , a panel cover 15 , an apron 15 , and the like.
  • the FFC cable 231 may be connected to the timing controller board 105 mounted on the panel roller 143 .
  • a through hole 615 may be formed on the panel roller 143 , and the FFC cable 231 may be connected to the timing controller board 105 through the through hole 615 .
  • the through hole 615 is located on one side of the panel roller 143 and may penetrate the outer peripheral portion of the panel roller 143 .
  • the FFC cable 231 may be connected to one side of the timing controller board 105 through the through hole 615 .
  • the connection to the timing controller board 105 may be maintained due to the through hole 615 . Accordingly, the FFC cable 231 may not be twisted by rotating together with the panel roller 143 .
  • a portion of the FFC cable 231 may be wound around the panel roller 143 .
  • a portion of the FFC cable 231 wound around the panel roller 143 may be referred to as a fourth portion 231d.
  • the fourth portion 231d may be in contact with the outer peripheral surface of the panel roller 143 .
  • a portion of the FFC cable 231 may pass through the through hole 615 .
  • a portion of the FFC cable 231 passing through the through hole 615 may be referred to as a fifth portion 231e.
  • a lower end of the FFC cable 231 may be electrically connected to the timing controller board 105 .
  • a portion of the FFC cable 231 may be located inside the panel roller 143 .
  • a portion of the FFC cable 231 positioned inside the panel roller 143 may be referred to as a sixth portion 231f.
  • the sixth part 231f may be electrically connected to the timing controller board 105 .
  • the image sensor 261 may be located inside the housing 30 .
  • the image sensor 261 may be disposed along the longitudinal direction of the housing 30 .
  • the image sensor 261 may be disposed to face the display panel 10 .
  • the image sensor 261 is disposed adjacent to the guide bar 234 of the housing 30 so as to photograph at least one region that is not exposed to the outside through the opening of the housing 30 among the entire region of the display panel 10 . It may be disposed inside.
  • the image sensor 261 may be coupled, fastened, or attached to the sensor support 265 .
  • the sensor support 265 may be disposed to extend downwardly from the top surface of the housing 30 .
  • the sensor support 265 may be coupled, fastened, or attached to the top surface of the housing 30 , and may extend downwardly from the top surface of the housing 30 .
  • the image sensor 261 may include a plurality of photoelectric conversion elements.
  • the photoelectric conversion device may be an integrated circuit using a semiconductor device manufacturing technology, and may be a device that detects a photon of received light and converts it into an electrical signal.
  • the photoelectric conversion element may be a photodiode that detects light and generates electric charge.
  • the image sensor 261 may include a plurality of sub image sensors 263 .
  • Each of the plurality of sub image sensors 263 may include at least one photoelectric conversion element.
  • the image sensor 261 may include at least one sensing group 262 including three or more sub image sensors 263 .
  • a plurality of sub image sensors 263 included in the image sensor 261 may be arranged side by side along the length direction of the image sensor 261 .
  • the image sensor 261 may acquire an image of one area of the display panel 10 at once through a plurality of sub image sensors 263 arranged side by side in the longitudinal direction.
  • a guide rail 267 may be disposed on the sensor support 265 , and the image sensor 261 may be connected to the guide rail 267 so as to be movable along the guide rail 267 .
  • the image sensor 261 may acquire an image of one area of the display panel 10 while moving along the guide rail 267 .
  • FIG 6 is an example of an internal block diagram of an image display device according to an embodiment of the present invention.
  • the image display device 100 includes a broadcast receiving unit 205 , an external device interface unit 230 , a network interface unit 235 , a storage unit 240 , a user input interface unit 250 , and a sensor. It may include a unit 260 , a control unit 270 , a driving unit 275 , a display 280 , an audio output unit 285 , and/or a power supply unit 290 .
  • the broadcast receiver 205 may include a tuner 210 and a demodulator 220 .
  • the tuner unit 210 may select a broadcast signal corresponding to a channel selected by the user or all channels stored in advance among broadcast signals received through an antenna (not shown) or a cable (not shown).
  • the tuner unit 210 may convert the selected broadcast signal into an intermediate frequency signal or a baseband video or audio signal.
  • the selected broadcast signal may be converted into a digital IF signal (DIF), and if the selected broadcast signal is an analog broadcast signal, it may be converted into an analog baseband image or audio signal (CVBS/SIF).
  • DIF digital IF signal
  • CVBS/SIF analog baseband image or audio signal
  • the tuner unit 210 may process a digital broadcast signal or an analog broadcast signal.
  • the analog baseband video or audio signal (CVBS/SIF) output from the tuner unit 210 may be directly input to the control unit 270 .
  • the tuner unit 210 may sequentially select broadcast signals of all broadcast channels stored through the channel storage function among the received broadcast signals, and convert them into an intermediate frequency signal or a baseband video or audio signal.
  • the tuner unit 210 may include a plurality of tuners in order to receive broadcast signals of a plurality of channels.
  • a single tuner that simultaneously receives broadcast signals of a plurality of channels is also possible.
  • the demodulator 220 may receive the digital IF signal DIF converted by the tuner 210 and perform a demodulation operation.
  • the demodulator 220 may output a stream signal TS after demodulation and channel decoding are performed.
  • the stream signal may be a signal obtained by multiplexing an image signal, an audio signal, or a data signal.
  • the stream signal output from the demodulator 220 may be input to the controller 270 .
  • the controller 270 After performing demultiplexing and image/audio signal processing, the controller 270 outputs an image through the display 280 (eg, the display 20 ), and outputs an audio through the audio output unit 285 . can do.
  • the external device interface unit 230 may transmit or receive data with an external device connected thereto.
  • the external device interface unit 230 may include an A/V input/output unit (not shown).
  • the external device interface unit 230 may be connected to an external device such as a DVD (Digital Versatile Disk), Blu-ray, game device, camera, camcorder, computer (notebook), set-top box, etc. by wire/wireless and , it is also possible to perform input/output operations with an external device.
  • DVD Digital Versatile Disk
  • Blu-ray Blu-ray
  • game device camera
  • camcorder computer
  • set-top box etc.
  • the A/V input/output unit may receive video and audio signals from an external device.
  • the external device interface unit 230 establishes a communication network with various remote control devices 300 to receive a control signal related to the operation of the image display device 100 from the remote control device 300 or display an image. Data related to the operation of the device 100 may be transmitted to the remote control device 300 .
  • the external device interface unit 230 may include a communication module (not shown) for short-range wireless communication with other electronic devices.
  • the external device interface unit 230 may transmit/receive data to/from an adjacent electronic device.
  • the external device interface unit 230 may receive device information, executed application information, application image, and the like, from the mobile terminal in the mirroring mode.
  • the network interface unit 235 may provide an interface for connecting the image display device 100 to a wired/wireless network including an Internet network.
  • the network interface unit 235 may receive content or data provided by the Internet or a content provider or network operator through a network.
  • the network interface unit 235 may include a communication module (not shown) for connection with a wired/wireless network.
  • the external device interface unit 230 and / or the network interface unit 235 Wi-Fi (Wireless Fidelity), Bluetooth (Bluetooth), Bluetooth low energy (Bluetooth Low Energy; BLE), Zigbee, Communication module for short-range communication such as near field communication (NFC), long-term evolution (LTE), LTE Advance (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications (UMTS) system) and a communication module for cellular communication such as Wireless Broadband (WiBro).
  • Wi-Fi Wireless Fidelity
  • Bluetooth Bluetooth
  • Bluetooth Low Energy Bluetooth Low Energy
  • BLE Bluetooth Low Energy
  • Zigbee Zigbee
  • Communication module for short-range communication such as near field communication (NFC), long-term evolution (LTE), LTE Advance (LTE-A), code division multiple access (CDMA), wideband CDMA (WCDMA), universal mobile telecommunications (UMTS) system
  • a communication module for cellular communication such as Wireless Broadband (W
  • the storage unit 240 may store a program for processing and controlling each signal in the control unit 270 , or may store a signal-processed image, audio, or data signal.
  • the storage unit 240 stores application programs designed for the purpose of performing various tasks that can be processed by the control unit 270 , and upon request of the control unit 270 , selectively selects some of the stored application programs. can provide
  • the program stored in the storage unit 240 is not particularly limited as long as it can be executed by the control unit 270 .
  • the storage unit 240 may perform a function for temporarily storing an image, audio, or data signal received from an external device through the external device interface unit 230 .
  • the storage unit 240 may store information about a predetermined broadcast channel through a channel storage function such as a channel map.
  • the storage unit 240 may store various data received through the external device interface unit 230 , the network interface unit 235 , and/or the user input interface unit 250 .
  • FIG. 6 illustrates an embodiment in which the storage unit 240 is provided separately from the control unit 270 , the scope of the present invention is not limited thereto, and the storage unit 240 may be included in the control unit 270 .
  • the storage unit 240 may include a volatile memory (eg, DRAM, SRAM, SDRAM, etc.), a non-volatile memory (eg, a flash memory), a hard disk drive (HDD), or a solid state drive (Solid). -state drive (SSD), etc.) may be included.
  • a volatile memory eg, DRAM, SRAM, SDRAM, etc.
  • a non-volatile memory eg, a flash memory
  • HDD hard disk drive
  • Solid solid state drive
  • SSD solid state drive
  • the user input interface unit 250 may transmit a signal input by the user to the control unit 270 or may transmit a signal from the control unit 270 to the user.
  • the user input interface unit 250 transmits/receives user input signals such as power on/off, channel selection, and screen setting from the remote control device 300 , or is provided in the image display device 100 .
  • a user input signal input from a local key such as a power key, a channel key, a volume key, and a setting value may be transmitted to the controller 270 .
  • the sensor unit 260 may include at least one sensor.
  • the sensor unit 260 may include a proximity sensor, a temperature/humidity sensor, an illuminance sensor, and the like.
  • the sensor unit 260 may measure a physical quantity or detect an operating state of the image display device 100 to convert the measured or sensed information into an electrical signal, and transmit the converted electrical signal to the control unit 270 . have.
  • the sensor unit 260 may include at least one panel temperature sensor (not shown) for detecting the temperature of the display panel 10 .
  • the panel temperature sensor may be attached to the display panel 10 or may be added in the form of a circuit for sensing a temperature between the display panel 10 and the panel driver 230 (refer to FIG. 7 ).
  • the sensor unit 260 may include an image sensor 261 .
  • the image sensor 261 may be implemented as either a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal-Oxide Semiconductor) image sensor.
  • the image sensor 261 may be implemented as a line image sensor, an array image sensor, or the like.
  • the image display device 100 includes an image signal processor that processes a sensing signal generated by a lens (not shown) on which light is incident and the image sensor 261 and converts it into a digital image; ISP) (not shown) and the like may be further included.
  • the image signal processor (ISP) may be included in the controller 270 .
  • the controller 270 may include at least one processor, and may control the overall operation of the image display apparatus 100 by using the processor included therein.
  • the processor may be a general processor such as a central processing unit (CPU).
  • the processor may be a dedicated device such as an ASIC or other hardware-based processor.
  • the control unit 270 demultiplexes a stream input through the tuner unit 210 , the demodulator 220 , the external device interface unit 230 , or the network interface unit 235 or processes the demultiplexed signals. , can generate and output a signal for video or audio output.
  • the driving unit 275 may include a panel roller 143 on which the display 280 is wound and at least one motor (not shown).
  • the display panel 10 may be wound or unwound on the panel roller 143 according to the rotation of the motor.
  • the rotation of the motor may be controlled by the controller 270 .
  • the controller 270 may determine the height of the area exposed to the outside of the housing 30 among the entire area of the display panel 10 based on the rotation degree of the panel roller 143 .
  • the display 280 may include an image signal, a data signal, an OSD signal, a control signal, or an image signal and data received from the external device interface unit 230 processed by the controller 270 .
  • a driving signal may be generated by converting a signal, a control signal, or the like. In this regard, it will be described with reference to FIG.
  • the display 280 may include a display panel 10 and a panel driver 281 .
  • the display panel 10 may include a plurality of pixels, and the plurality of pixels may be connected to a plurality of gate lines GL and data lines DL intersecting in a matrix form.
  • a plurality of thin film transistors TFTs may be disposed at intersections of the plurality of gate lines GL and the data lines DL.
  • the plurality of pixels provided in the display panel 10 may include RGB sub-pixels.
  • the plurality of pixels included in the display panel 10 may include RGBW sub-pixels.
  • the display 280 may convert an image signal, a data signal, an OSD signal, a control signal, etc. processed by the controller 270 to generate driving signals for a plurality of pixels.
  • the panel driver 281 may drive the display panel 10 based on a control signal and a data signal transmitted from the controller 270 .
  • the panel driver 281 may include a timing controller 282 , a gate driver 284 , and/or a data driver 286 .
  • the timing controller 282 may receive a control signal, an image signal, and the like from the controller 170 .
  • the timing controller 282 may control the gate driver 284 and/or the data driver 286 in response to a control signal.
  • the timing controller 282 may rearrange the image signal according to the specification of the data driver 286 and transmit it to the data driver 286 .
  • the gate driver 284 and the data driver 286 may supply a scan signal and an image signal to the display panel 10 through the gate line GL and the data line DL under the control of the timing controller 282 . have.
  • the data driver 286 may include a plurality of source driver integrated circuits (ICs) (not shown) corresponding to the plurality of data lines DL.
  • ICs source driver integrated circuits
  • the display 280 may be a flexible display including an organic light emitting panel formed of an organic light emitting diode (OLED).
  • the display panel 10 may be formed on a substrate made of a material having flexibility such as polyimide.
  • the plurality of pixels may be formed of an organic light emitting diode (OLED).
  • the display 280 may be capable of a three-dimensional display (3D display).
  • the display 280 capable of a 3D display may be divided into a glasses-free type and a glasses type.
  • the display 280 may be configured as a touch screen and used as an input device in addition to an output device.
  • the power supply unit 290 may supply the corresponding power throughout the image processing apparatus 100 .
  • the control unit 270 that can be implemented in the form of a system on chip (SOC), the display 280 for displaying an image, and the audio output unit 285 for outputting audio. have.
  • SOC system on chip
  • the power supply unit 290 may include a converter (not shown) that converts AC power into DC power, and a Dc/Dc converter (not shown) that converts the level of DC power.
  • the power supply unit 290 may supply a common electrode voltage Vcom to the display panel 10 and may supply a gamma voltage to the data driver 286 .
  • the image signal processed by the controller 270 may be input to the display 280 and displayed as an image corresponding to the image signal. Also, the image signal processed by the control unit 270 may be input to an external output device through the external device interface unit 230 .
  • the controller 270 may include a demultiplexer (not shown), an image processor (not shown), and the like.
  • the controller 270 may receive a sensing signal from the image sensor 261 and generate an image based on the received sensing signal. At this time, the control unit 270 may determine the height of the area exposed to the outside of the housing 30 among the entire area of the display panel 10 based on the degree of rotation of the panel roller 143 , An area of the display panel 10 corresponding to the sensing signal received from the sensor 261 may be determined.
  • the controller 270 controls the plurality of sub-image sensors 263 included in the sensing group 262 .
  • the sensing signals of the image sensor 263 may be compared. In this case, when any one of the sensing signals of the plurality of sub image sensors 263 is different from the other signals by a predetermined reference or more, an operation may be performed based on the remaining signals except for the corresponding signal. Through this, it is possible to further improve the accuracy of signal processing.
  • the audio output unit 285 may include an audio device such as a speaker and a buzzer, and may receive a signal processed by the control unit 270 and output it as a voice.
  • the audio signal processed by the controller 270 may be outputted to the audio output unit 285 . Also, the audio signal processed by the controller 270 may be input to an external output device through the external device interface unit 230 .
  • controller 270 may control overall operations within the image processing apparatus 100 .
  • control unit 270 may control the tuner unit 210 to select a channel selected by the user or a broadcast corresponding to a pre-stored channel (Tuning).
  • controller 270 may control the image processing apparatus 100 according to a user command input through the user input interface unit 250 or an internal program.
  • the controller 270 may control the display 280 to display an image.
  • the image displayed on the display 280 may be a still image or a moving image, and may be a 2D image or a 3D image.
  • the controller 270 may cause a predetermined 2D object to be displayed in the image displayed on the display 280 .
  • the object may be at least one of an accessed web screen (newspaper, magazine, etc.), an Electronic Program Guide (EPG), various menus, widgets, icons, still images, moving pictures, and text.
  • EPG Electronic Program Guide
  • the image processing apparatus 100 may further include a photographing unit (not shown).
  • the photographing unit may photograph the user.
  • the photographing unit may be implemented with one camera, but is not limited thereto, and may be implemented with a plurality of cameras.
  • the photographing unit may be embedded in the image processing apparatus 100 on the display 280 or disposed separately. Image information captured by the photographing unit may be input to the control unit 270 .
  • the controller 270 may determine the location of the user based on the image captured by the photographing unit. For example, the controller 270 may determine the distance (z-axis coordinate) between the user and the image processing apparatus 100 . In addition, the controller 270 may determine the x-axis coordinates and the y-axis coordinates in the display 280 corresponding to the user's location.
  • the controller 270 may detect the user's gesture based on each or a combination of an image captured by the photographing unit or a signal sensed from the sensor unit.
  • the image display device 100 may further include an input unit (not shown).
  • the input unit may be provided on one side of the main body of the image display device 100 .
  • the input unit may include a touch pad, a physical button, and the like.
  • the input unit may receive various user commands related to the operation of the image display apparatus 100 , and may transmit a control signal corresponding to the input command to the control unit 270 .
  • the image display device 100 may be a fixed type or a mobile type digital broadcasting receiver capable of receiving digital broadcasting.
  • the block diagram of the image display device 100 shown in FIG. 6 is only a block diagram for an embodiment of the present invention, and each component of the block diagram is actually implemented according to the specifications of the image display device 100 . may be incorporated, added, or omitted.
  • two or more components may be combined into one component, or one component may be subdivided into two or more components as needed.
  • the function performed in each block is for explaining the embodiment of the present invention, and the specific operation or device does not limit the scope of the present invention.
  • the remote control device 300 may include various communication modules such as Wireless Fidelity (Wi-Fi), Bluetooth (Bluetooth), Bluetooth Low Energy (BLE), Zigbee, and Near Field Communication (NFC).
  • Wi-Fi Wireless Fidelity
  • Bluetooth Bluetooth
  • BLE Bluetooth Low Energy
  • Zigbee Zigbee
  • NFC Near Field Communication
  • the remote control device 300 may transmit a user command to the user input interface unit 250 through the communication module.
  • the remote control device 300 may receive, through the communication module, an image, audio or data signal output from the user input interface unit 250 , and display it or output the audio signal from the remote control device 300 . have.
  • FIG. 8 is an example of a flowchart of a method of operating an image display apparatus according to an embodiment of the present invention.
  • the image display apparatus 100 may check whether operation control of the panel roller 143 is performed so that the display panel 10 is rolled up or rolled down in operation S810 .
  • the image display device 100 uses the panel roller 143 to roll the display panel 10 up or down. You can control the action.
  • the image display device 100 is not exposed to the outside of the housing 30 while the display panel 10 is rolled up or rolled down.
  • a preset image may be displayed through at least one of the areas (hereinafter, non-exposed areas) of the display panel 10 .
  • At least one region on which a preset image is displayed may be a region corresponding to the position of the image sensor 261 disposed inside the housing 30 .
  • the preset image includes a red image, a green image, a blue image, a gray image according to a preset gradation value, a grayscale pattern image, and a test pattern image (eg: SMPTE color bar image).
  • an image may not be displayed in the exposed area of the entire area of the display panel 10, and a static image different from a preset image displayed in the non-exposed area An image or a dynamic image may be displayed.
  • the image display apparatus 100 may generate a sensing signal through the image sensor 261 while a preset image is displayed through at least one of the non-exposed areas of the display panel 10 .
  • the image display apparatus 100 may determine the state of the display panel 10 based on the sensing signal generated by the image sensor 261 in operation S840 .
  • the image sensor 261 may continuously generate a sensing signal and transmit it to the control unit 270 , and the control unit 270 responds to the sensing signal received from the image sensor 261 .
  • a corresponding image can be created.
  • the image display apparatus 100 may compare an image corresponding to the sensing signal with a reference image, and may determine the state of the display panel 10 based on a result of comparing the two images.
  • the reference image may be an image pre-stored in the storage unit 240 for determining the state of the display panel 10 .
  • the image display apparatus 100 may determine whether at least one area including an afterimage exists among the entire area of the display panel 10 by comparing the image corresponding to the sensing signal with the reference image. have.
  • the image display apparatus 100 may compare an image corresponding to the sensing signal with a reference image to determine whether there is at least one area in which luminance is non-uniform due to a defective pixel.
  • the image display apparatus 100 may check whether operation control for the panel roller 143 is completed in operation S850 .
  • the image display device 100 when the power is turned off, operation control for the panel roller 143 is completed, so that the display panel 10 is not exposed to the outside of the housing 30 . , it can be checked whether all of the interior of the housing 30 has been moved.
  • the operation control for the panel roller 143 is completed, so that the entire area of the display panel 10 is the housing 30 . It can be checked whether or not it has been exposed to the outside of
  • the image display device 100 branches to operation S820 to continuously display a preset image through at least one of the non-exposed regions of the display panel 10 . and may generate a sensing signal through the image sensor 261 .
  • the image display apparatus 100 may perform a function according to the state of the display panel 10 when the operation control for the panel roller 143 is completed in operation S860 .
  • the image display apparatus 100 may provide for at least one pixel included in the corresponding area to compensate for the afterimage. action can be performed.
  • the image display apparatus 100 may perform color correction on defective pixels included in the corresponding area. .
  • the image display apparatus 100 first determines the state of the display panel 10 , and when the operation of the panel roller operation 143 is completed, the display panel.
  • the image display device 100 may determine the state of the display panel 10 and perform a function according to the state of the display panel 10
  • the image display apparatus 100 may determine the state of the display panel 10 and perform a function according to the state of the display panel 10 .
  • 9A and 9B are an example of a flowchart of a method of operating an image display apparatus according to an embodiment of the present invention. A detailed description of the content overlapping with the content described in FIG. 8 will be omitted.
  • the image display apparatus 100 may check whether the operation of the panel roller 143 is controlled so that the display panel 10 is rolled up or rolled down.
  • the image display apparatus 100 may check whether the operation of the panel roller 143 is controlled so that the display panel 10 rolls down in operation S902 .
  • the operation of the panel roller 143 may be controlled so that the display panel 10 rolls down.
  • the image display apparatus 100 may display an image for detecting a preset afterimage through at least one of the non-exposed areas of the display panel 10 while the display panel 10 is rolled down in operation S903.
  • the image for afterimage detection may be a gray image according to a preset grayscale value. For example, among 256 gray levels, it may be a 32 gray level gray image or a 64 gray level gray image.
  • the image for afterimage detection may be at least one of a red image, a green image, and a blue image.
  • an image may not be displayed in the exposed area among the entire area of the display panel 10, and a static image different from the image for afterimage detection displayed in the non-exposed area, or A dynamic image may be displayed.
  • the image display device 100 generates a sensing signal through the image sensor 261 while a preset image for afterimage detection is displayed through at least one of the non-exposed regions of the display panel 10 in operation S904 .
  • the image display apparatus 100 determines whether at least one area including an afterimage exists among the entire area of the display panel 10 based on the sensing signal generated by the image sensor 261 .
  • the size of the exposed area 21 and the size of the non-exposed area 22 of the display panel 10 may be continuously changed while the display panel 10 is rolled down. Also, one area corresponding to the position of the image sensor 261 among the non-exposed areas 22 of the display panel 10 may be continuously changed while the display panel 10 is rolled down.
  • the display panel 10 is rolled down, and the position of the first line area 1010 among the non-exposed areas 22 is an image disposed inside the housing 30 .
  • a gray image may be displayed on the first line area 1010 .
  • the image display apparatus 100 may generate a sensing signal through the image sensor 261 while a gray image is displayed on the first line area 1010 .
  • the image display device 100 corresponds to the gray image displayed through the first line area 1010 by the sensing signal generated by the image sensor 261 based on the rotation degree of the panel roller 143 . It can be confirmed that the sensing signal is
  • the display panel 10 continues to roll down, so that the positions of the second line area 1020 and the third line area 1030 among the non-exposed areas 22 are determined by the housing 30 .
  • gray images may be sequentially displayed on the second line area 1020 and the third line area 1030 .
  • the image display apparatus 100 may generate a sensing signal through the image sensor 261 while gray images are sequentially displayed on the second line area 1020 and the third line area 1030 .
  • the image display device 100 may display a sensing signal generated by the image sensor 261 based on the rotation degree of the panel roller 143 to the second line area 1020 or the third line area 1030 . It can be confirmed that it is a sensing signal corresponding to the displayed gray image.
  • the image display device 100 displays the gray image only in the line area corresponding to the position of the image sensor 261 and controls the gray image not to be displayed any more in the remaining area of the non-exposed area 22, so that unnecessary Power consumption can be reduced.
  • the image display device 100 may detect an area with a high probability of generating an afterimage through various methods while displaying a screen through the exposed area of the display panel 10, , a preset image for afterimage detection may be displayed only for an area in which an afterimage is highly likely to occur.
  • the image display apparatus 100 may determine whether there is an object corresponding to a predetermined logo among objects included in the screen, and an area including the object corresponding to the predetermined logo. can be detected as a region with a high probability of generating an afterimage.
  • the image display apparatus 100 divides the display panel 10 into a plurality of blocks, calculates a difference between frames of an image displayed through each block for a predetermined time, so that the difference between the frames is less than a predetermined standard.
  • a block can be detected as a region with a high probability of afterimage occurrence.
  • the image display device 100 displays the corresponding one area 1101 can be detected as a region with a high probability of generating an afterimage.
  • the line area 1110 including one area 1101 detected as an area with a high probability of generating an afterimage is displayed.
  • a position corresponding to the position of the image sensor 261 is reached, a gray image may be displayed on the corresponding line region 1110 , and a gray image displayed on the corresponding line region 1110 through the image sensor 261 may be A corresponding sensing signal may be generated.
  • FIG. 11B shows that a gray image is displayed on the corresponding line area 1110
  • the image display device 100 includes the image sensor 261 movable on the guide rail 267
  • the possibility of afterimage occurrence When the line region 1110 including the region 1101 detected as the high region reaches a position corresponding to the position of the image sensor 261 , a gray image may be displayed only on the region 1101 .
  • the image display apparatus 100 may move the image sensor 261 to correspond to the one area 1101 to generate a sensing signal corresponding to the gray image displayed on the one area 1101 .
  • the image display device 100 branches to operation S903 and detects a preset afterimage through at least one of the non-exposed areas of the display panel 10 .
  • the operation of displaying an image for the purpose may be continued.
  • the image display apparatus 100 performs an operation for compensating for an afterimage with respect to an area including an afterimage among the entire area of the display panel 10 . can be performed.
  • the image display device 100 operates the thin film transistor DT, which is a driving element of the display panel 10, in a source follower manner, and then operates the thin film transistor DT.
  • the source voltage Vs may be detected as the sensing voltage VsenA, and the threshold voltage Vth of the thin film transistor DT may be calculated based on the sensing voltage VsenA.
  • the sensing voltage VsenA may be detected after the gate-source voltage Vgs of the thin film transistor DT reaches a saturation state.
  • the image display device 100 calculates the threshold voltage variation to determine the deterioration level of the driving element. may be determined, and the threshold voltage Vth of the driving element may be corrected based on the degradation level.
  • the image display apparatus 100 may correct the threshold voltage Vth of the driving element based on a look-up table of the luminance change amount according to the threshold voltage change amount.
  • the look-up table is generally prepared based on the threshold voltage change amount versus the luminance change amount calculated at a certain temperature (eg, room temperature, 25 degrees Celsius), the temperature of the display panel 10 through the panel temperature sensor or the like.
  • the threshold voltage Vth of the driving element may be corrected.
  • the threshold voltage Vth of the driving element can also be corrected.
  • the image display device 100 performs a preset defect through at least one of the non-exposed areas of the display panel 10 while the display panel 10 is rolled-up.
  • An image for detection of a pixel can be displayed.
  • the image for detecting the bad pixel may include at least one of a red image, a green image, a blue image, and a test pattern image (eg, an SMPTE color bar image).
  • the operation of the panel roller 143 may be controlled so that the display panel 10 is rolled up, and an image for detecting a preset bad pixel may be displayed while the display panel 10 is rolled up.
  • the image display device 100 receives a sensing signal through the image sensor 261 while an image for detecting a preset bad pixel is displayed through at least one of the non-exposed regions of the display panel 10 . can create
  • the image display apparatus 100 determines whether at least one area including a defective pixel exists among the entire area of the display panel 10 based on the sensing signal generated by the image sensor 261 . can judge
  • the size of the exposed area 21 and the size of the non-exposed area 22 of the display panel 10 may be continuously changed while the display panel 10 is rolled up. Also, one area corresponding to the position of the image sensor 261 among the non-exposed areas 22 of the display panel 10 may be continuously changed while the display panel 10 is rolled up.
  • the display panel 10 is rolled up, and the position of the first line area 1310 among the non-exposed areas 22 is an image disposed inside the housing 30 .
  • a red image may be displayed on the first line area 1310 .
  • the image display apparatus 100 may generate a sensing signal through the image sensor 261 while a red image is displayed on the first line area 1310 .
  • the image display device 100 corresponds to the red image displayed through the first line area 1310 by the sensing signal generated by the image sensor 261 based on the rotation degree of the panel roller 143 . It can be confirmed that the sensing signal is
  • the display panel 10 is rolled up, and the position of the second line area 1320 among the non-exposed areas 22 is disposed inside the housing 30 .
  • a green image different from the image displayed through the first line area 1310 may be displayed on the second line area 1320 , and the second line area 1320 .
  • a sensing signal may be generated through the image sensor 261 while the drawn image is displayed.
  • the display panel 10 is rolled up, and the position of the third line area 1330 among the non-exposed areas 22 is disposed inside the housing 30 . If it corresponds to the position of the image sensor 261, a blue image different from the image displayed through the first line area 1310 and the second line area 1320 may be displayed on the third line area 1330, , while a blue image is displayed on the third line region 1330 , a sensing signal may be generated through the image sensor 261 .
  • the display panel 10 is rolled up, and the line area corresponding to the position of the image sensor 261 among the non-exposed areas 22 of the display panel 10 is continuously changed. In the meantime, images for detecting bad pixels displayed through each line region may be different from each other.
  • operation S911 when at least one region in which luminance is non-uniform due to a defective pixel exists, color correction is performed on the defective pixel included in the corresponding region. action can be performed for
  • the image display apparatus 100 may identify a defective pixel included in an area having non-uniform luminance based on the color coordinate of an image corresponding to the sensing signal generated by the image sensor 261 , Color correction may be performed by changing the color coordinates of in-pixels. In this case, the image display apparatus 100 may change the color coordinates of the defective pixel based on the look-up table for the deviation of the color coordinates.
  • the image display apparatus 100 may check whether the roll-up operation of the panel roller 143 is completed and the display panel 10 is exposed to the outside of the housing 30 according to the setting.
  • the image display device 100 branches to operation S908 and detects preset bad pixels through at least one of the non-exposed areas of the display panel 10 .
  • the operation of displaying an image for detection may be continued.
  • the image display device 100 performs a function of detecting a bad pixel according to a user input, while the display panel 10 is rolled up or rolled down, the display panel 10 ), while sequentially displaying the red image, the green image, and the blue image through all the line regions of ), it is also possible to more accurately determine whether there is a defective pixel in the display panel 10 .
  • a red image, a green image, and a blue image are performed through the first line area 1410 among the non-exposed areas of the display panel 10 . may be sequentially displayed.
  • the image display device 100 generates sensing signals for the red image, the green image, and the blue image displayed through the first line region 1410 through the image sensor 261 and compares them with the reference image. By doing so, it is possible to more accurately determine whether there is a defective pixel.
  • the image display device 100 displays the second line area 1420 among the non-exposed areas of the display panel 10 .
  • the operation of the panel roller 143 may be controlled to correspond to the position of the image sensor 261 , and a red image, a green image, and a blue image may be sequentially displayed through the second line area 1420 .
  • the display panel 10 whenever the display panel 10 is rolled up or rolled down, the display panel ( 10), and when a problem occurs, an operation according to the state of the display panel 10 can be immediately performed before the user recognizes a state abnormality with respect to the display panel 10, so that the image display device 100 ) can improve the user's reliability and satisfaction with the performance and quality.
  • an operation according to the state of the display panel 10 with respect to a partial area of the display panel 10 detected through the image sensor 261 . can be quickly performed, so that the time required to perform an operation according to the state of the display panel 10 can be effectively reduced.
  • the method of operating an image display apparatus of the present invention can be implemented as processor-readable codes on a processor-readable recording medium provided in the image display apparatus.
  • the processor-readable recording medium includes all types of recording devices in which data readable by the processor is stored. Examples of the processor-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and also includes those implemented in the form of carrier waves such as transmission over the Internet. .
  • the processor-readable recording medium is distributed in a computer system connected through a network, so that the processor-readable code can be stored and executed in a distributed manner.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention concerne un dispositif d'affichage d'image et son procédé de fonctionnement. Un dispositif d'affichage d'image selon un mode de réalisation de la présente invention comprend un boîtier, un rouleau disposé à l'intérieur du boîtier et une pluralité de pixels. Le dispositif d'affichage d'image comprend : un panneau d'affichage qui peut être enroulé sur le rouleau ou déroulé de celui-ci ; un capteur d'image disposé à l'intérieur du boîtier de manière à faire face au panneau d'affichage ; et une unité de commande servant à commander le fonctionnement du rouleau pour que le panneau d'affichage s'enroule ou se déroule. L'unité de commande peut : afficher une image prédéfinie par l'intermédiaire d'au moins une région du panneau d'affichage pendant que le panneau d'affichage est enroulé ou déroulé, la première région n'étant pas exposée à l'extérieur du boîtier ; recevoir un signal de détection provenant du capteur d'image pendant que l'image prédéfinie est affichée ; et déterminer l'état du panneau d'affichage sur la base du signal de détection. Divers autres modes de réalisation sont également possibles.
PCT/KR2020/000097 2020-01-03 2020-01-03 Dispositif d'affichage d'image et son procédé de fonctionnement WO2021137339A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015194567A (ja) * 2014-03-31 2015-11-05 三菱電機株式会社 表示装置
KR20160043744A (ko) * 2014-10-14 2016-04-22 엘지디스플레이 주식회사 유기 발광 다이오드 표시장치
KR20170081094A (ko) * 2015-12-31 2017-07-11 엘지디스플레이 주식회사 유기발광다이오드 표시장치 및 그의 화질 보상방법
KR20170122313A (ko) * 2016-04-26 2017-11-06 삼성디스플레이 주식회사 플렉서블 표시 장치 및 플렉서블 표시 장치의 영상 보상 방법
US20180357985A1 (en) * 2017-06-08 2018-12-13 Lg Electronics Inc. Digital signage and operating method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015194567A (ja) * 2014-03-31 2015-11-05 三菱電機株式会社 表示装置
KR20160043744A (ko) * 2014-10-14 2016-04-22 엘지디스플레이 주식회사 유기 발광 다이오드 표시장치
KR20170081094A (ko) * 2015-12-31 2017-07-11 엘지디스플레이 주식회사 유기발광다이오드 표시장치 및 그의 화질 보상방법
KR20170122313A (ko) * 2016-04-26 2017-11-06 삼성디스플레이 주식회사 플렉서블 표시 장치 및 플렉서블 표시 장치의 영상 보상 방법
US20180357985A1 (en) * 2017-06-08 2018-12-13 Lg Electronics Inc. Digital signage and operating method thereof

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