Image display device

Abstract

The present disclosure relates to an image display device. The image display device according to one embodiment of the present disclosure comprises: a panel; a first circuit board including a signal processing device and a power manager; a connector for connection to the power manager in the first circuit board; a second circuit board which includes a plurality of input ports connected to the connector and which outputs a driving voltage to the panel; and a cable connected between a plurality of ports of the power manager and the connector, wherein the power manager variably changes a setting level for overcurrent protection of some of the plurality of ports when a foreign substance is attached to some of the plurality of input ports connected to the connector. Therefore, an image can be stably displayed even if a foreign substance is attached to a display.

Description

Video display device

[0001] The present disclosure relates to an image display device, and more particularly, to an image display device capable of stably displaying an image despite foreign matter being attached to the display.

[0002] A video display device is a device that displays images.

[0003] In response to the recent increase in image resolution and image clarity, the display resolution of the display within the image display device is increasing.

[0004] Meanwhile, for image display, various voltages are supplied to the panel within the display, and at this time, it is desirable to set a current level for over current protection.

[0005] However, when a foreign substance is attached to the display, the supply of video signals to the panel is interrupted due to the current level setting for overcurrent protection.

[0006] For example, if a simple foreign substance is attached to the display, a problem occurs where the image is not displayed.

[0007] The problem of the present disclosure is to provide an image display device that can stably display an image despite foreign matter being attached to the display.

[0008] Another object of the present disclosure is to provide a display device capable of limiting overcurrent protection due to foreign matter attached to the display.

[0009] Another problem of the present disclosure is to provide a video display device capable of performing a protective operation when a crack occurs in the panel.

[0010] According to one embodiment of the present disclosure for solving the above problem, a video display device comprises a first circuit board including a panel, a signal processing device, and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager varies a setting level for overcurrent protection of some of the plurality of ports when a foreign substance is attached to some of the plurality of input ports connected to the connector.

[0011] Meanwhile, the power manager may increase the setting level for overcurrent protection of some of the plurality of ports from the first level to the second level if foreign substances are attached to some of the plurality of input ports connected to the connector.

[0012] Meanwhile, the power manager can sequentially increase the setting level for overcurrent protection of some of the multiple input ports connected to the connector when foreign matter is attached to some of the multiple ports.

[0013] Meanwhile, the power manager can sequentially increase the setting level for overcurrent protection of some of the multiple input ports connected to the connector to a level below the allowable level when foreign substances are attached to some of the multiple ports.

[0014] Meanwhile, the power manager may vary the setting level for overcurrent protection of ports corresponding to some of the plurality of input ports among the plurality of ports when foreign substances are attached to some of the plurality of input ports connected to the connector, and may maintain the setting level for overcurrent protection of ports not corresponding to some of the plurality of input ports among the plurality of ports.

[0015] Meanwhile, if a foreign substance is attached to some of the plurality of input ports connected to the connector, the power manager may increase the setting level for overcurrent protection of ports corresponding to some of the plurality of input ports from the first level to the second level, and maintain the setting level for overcurrent protection of ports not corresponding to some of the plurality of input ports at the first level.

[0016] Meanwhile, the power manager may be turned off if a crack occurs in the panel.

[0017] Meanwhile, the power manager can detect a current output from at least some of the plurality of ports, and if the detected current is equal to or greater than a first level and less than an allowable value, turn off, and after turning off, turn on again, and after turning on again, increase a set level for overcurrent protection from the first level to a second level.

[0018] Meanwhile, the power manager may detect a current output from at least some of the plurality of ports after increasing the setting level to a second level, and if the detected current is equal to or greater than the second level and less than the allowable value, may be turned off, and after being turned off, may be turned on again, and after being turned on again, may be turned on again to increase the setting level for overcurrent protection from the second level to a third level.

[0019] Meanwhile, the power manager can detect a current output from at least some of the plurality of ports after increasing the set level to the second level, and maintain the set level at the second level if the detected current is less than the second level.

[0020] Meanwhile, the power manager may detect a current output from at least some of the plurality of ports after increasing the setting level to a third level, and if the detected current is equal to or greater than the third level and less than the allowable value, may be turned off, and after being turned off, may be turned on again, and after being turned on again, may be able to increase the setting level for overcurrent protection from the third level to a fourth level.

[0021] Meanwhile, the power manager can detect a current output from at least some of the plurality of ports after increasing the setting level to the third level, and maintain the setting level at the third level if the detected current is less than the third level.

[0022] Meanwhile, the power manager can detect the current output from at least some of the plurality of ports and turn off if the detected current is above an allowable value.

[0023] Meanwhile, the power manager detects a current output from at least some of the plurality of ports, and if the detected current is equal to or higher than a first level, which is a set level, and less than an allowable value, the power manager is turned off, and when turned off, a signal for converting a high level to a low level can be transmitted to a signal processing device through a fault port.

[0024] Meanwhile, the power manager may be turned off when the overcurrent protection level is higher than a predetermined number of ports among a plurality of input ports connected to the connector, and may change the setting level when the overcurrent protection level is higher than a predetermined number of ports among a plurality of input ports connected to the connector.

[0025] According to another embodiment of the present disclosure, a video display device includes a panel, a first circuit board including a signal processing device and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager detects a current output from at least some of the plurality of ports, and when the detected current is equal to or greater than a first level and less than an allowable value, is turned off, and after being turned off, is turned on again, and after being turned on again, changes a set level for overcurrent protection of some of the plurality of ports from the first level to a second level.

[0026] According to another embodiment of the present disclosure, a video display device includes a panel, a first circuit board including a signal processing device and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager varies a setting level for overcurrent protection of a port corresponding to some of the plurality of input ports among the plurality of ports when a foreign substance is attached to some of the plurality of input ports connected to the connector, and maintains the setting level for overcurrent protection of a port not corresponding to some of the plurality of input ports among the plurality of ports.

[0027] According to one embodiment of the present disclosure, a video display device comprises a panel, a first circuit board including a signal processing device and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager varies a setting level for overcurrent protection of some of the plurality of ports when a foreign substance is attached to some of the plurality of input ports connected to the connector. Accordingly, an image can be stably displayed despite the attachment of a foreign substance to the display. In particular, overcurrent protection due to a foreign substance attached to the display can be limited.

[0028] Meanwhile, if foreign matter is attached to some of the multiple input ports connected to the connector, the power manager can increase the setting level for overcurrent protection of some of the multiple ports from Level 1 to Level 2. This makes it possible to limit overcurrent protection due to foreign matter attached to the display.

[0029] Meanwhile, the power manager can sequentially increase the setting level for overcurrent protection of some of the multiple input ports connected to the connector if foreign matter is attached to some of the ports. This can limit overcurrent protection due to foreign matter attached to the display.

[0030] Meanwhile, if foreign matter adheres to some of the multiple input ports connected to the connector, the power manager can sequentially increase the setting level for overcurrent protection for some of the multiple ports to a level below the allowable limit. This allows for limiting overcurrent protection due to foreign matter attached to the display.

[0031] Meanwhile, if a foreign substance is attached to some of the multiple input ports connected to the connector, the power manager can change the setting level for overcurrent protection of ports corresponding to some of the multiple input ports, and maintain the setting level for overcurrent protection of ports not corresponding to some of the multiple input ports. Accordingly, it is possible to limit overcurrent protection due to foreign substances attached to the display.

[0032] Meanwhile, if a foreign substance is attached to some of the plurality of input ports connected to the connector, the power manager can increase the setting level for overcurrent protection of ports corresponding to some of the plurality of input ports from the first level to the second level, and maintain the setting level for overcurrent protection of ports not corresponding to some of the plurality of input ports at the first level. Accordingly, it is possible to limit overcurrent protection due to foreign substances attached to the display.

[0033] Meanwhile, the power manager can be turned off if a crack occurs in the panel. This allows for protective actions to be taken in the event of a crack in the panel.

[0034] Meanwhile, the power manager can detect the current output from at least some of the plurality of ports, and if the detected current is higher than a first level and lower than an allowable value, turn off, turn on again after turning off, and increase the set level for overcurrent protection from the first level to the second level after turning on again. Accordingly, overcurrent protection due to foreign substances attached to the display can be limited.

[0035] Meanwhile, the power manager may detect the current output from at least some of the plurality of ports after increasing the set level to the second level, and if the detected current is greater than or equal to the second level and less than the allowable value, turn off, and after turning off, turn on again, and after turning on again, increase the set level for overcurrent protection from the second level to the third level. Accordingly, overcurrent protection due to foreign substances attached to the display may be limited.

[0036] Meanwhile, the power manager can detect the current output from at least some of the multiple ports after increasing the set level to the second level, and maintain the set level at the second level if the detected current is below the second level. This can limit overcurrent protection due to foreign matter attached to the display.

[0037] Meanwhile, the power manager can detect the current output from at least some of the plurality of ports after increasing the setting level to the third level, and if the detected current is higher than the third level and lower than the allowable value, turn off, and after turning off, turn on again, and after turning on again, increase the setting level for overcurrent protection from the third level to the fourth level. Accordingly, it is possible to limit overcurrent protection due to foreign substances attached to the display.

[0038] Meanwhile, the power manager can detect the current output from at least some of the multiple ports after increasing the set level to the third level, and maintain the set level at the third level if the detected current is below the third level. This can limit overcurrent protection due to foreign matter attached to the display.

[0039] Meanwhile, the power manager can detect the current output from at least some of the multiple ports and turn off if the detected current exceeds the allowable limit. This can limit overcurrent protection due to foreign matter attached to the display.

[0040] Meanwhile, the power manager detects the current output from at least some of the plurality of ports, and if the detected current is higher than a first level, which is a set level, and lower than an allowable value, the power manager is turned off, and when turned off, a high-level to low-level conversion signal can be transmitted to a signal processing device through a fault port. Accordingly, overcurrent protection due to foreign matter attached to the display can be limited.

[0041] Meanwhile, the power manager may be turned off when the overcurrent protection level is higher than a predetermined number of ports among the plurality of input ports connected to the connector, and may change the setting level when the overcurrent protection level is higher than a predetermined number of ports among the plurality of input ports connected to the connector. Accordingly, it is possible to limit overcurrent protection due to foreign substances attached to the display.

[0042] According to another embodiment of the present disclosure, a video display device comprises a panel, a first circuit board including a signal processing device and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager detects a current output from at least some of the plurality of ports, and if the detected current is equal to or greater than a first level and less than an allowable value, turns off, and after turning off, turns on again, and after turning on again, changes a set level for overcurrent protection of some of the plurality of ports from the first level to a second level. Accordingly, it is possible to stably display an image despite the attachment of a foreign substance to the display. In particular, it is possible to limit overcurrent protection due to a foreign substance attached to the display.

[0043] According to another embodiment of the present disclosure, a video display device comprises a panel, a first circuit board including a signal processing device and a power manager, a connector for connection with the power manager in the first circuit board, a plurality of input ports connected to the connector, a second circuit board for outputting a driving voltage to the panel, and a cable connected between the plurality of ports of the power manager and the connector, wherein the power manager varies a setting level for overcurrent protection of a port corresponding to some of the plurality of input ports among the plurality of ports when a foreign substance is attached to some of the plurality of input ports connected to the connector, and maintains the setting level for overcurrent protection of a port not corresponding to some of the plurality of input ports among the plurality of ports. Accordingly, it is possible to stably display an image despite the attachment of a foreign substance to the display. In particular, it is possible to limit overcurrent protection due to a foreign substance attached to the display.

[0044] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0045] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0046] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0047] Figure 4 is an example of an internal block diagram of the display of Figure 2.

[0048] Figure 5 is an example of an internal circuit diagram of the power supply unit of Figure 2.

[0049] Fig. 6a is an example of a rear view of the image display device of Fig. 1.

[0050] Figures 6b to 6c are drawings referenced in the description of Figure 6a.

[0051] Figures 7a and 7b are drawings illustrating foreign substances being attached to a display.

[0052] Figures 7c to 7d are drawings referenced in the description of Figures 7a to 7b.

[0053] FIG. 8A is an example of an internal circuit diagram of an image display device according to one embodiment of the present disclosure.

[0054] FIG. 8b is another example of an internal circuit diagram of a video display device according to one embodiment of the present disclosure.

[0055] Figures 9a and 9b are drawings referenced in the description of Figures 8a and 8b.

[0056] FIG. 10a is a flowchart showing an operation method of an image display device according to an embodiment of the present disclosure.

[0057] FIG. 10b is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0058] FIG. 10c is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0059] FIG. 10d is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0060] Figures 11a to 12b are drawings referenced in the description of Figures 10a to 10d.

[0061] Figure 13 is another example of an internal block diagram of the display of Figure 2.

[0062] Figures 14a and 14b are drawings for reference in the description of the organic light-emitting panel of Figure 13.

[0063] Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

[0064] The suffixes "module" and "part" used in the following description are given solely for the convenience of writing this specification and do not impart any particularly significant meaning or role to the components themselves. Therefore, the terms "module" and "part" may be used interchangeably.

[0065] FIG. 1 is a drawing illustrating an image display device according to one embodiment of the present disclosure.

[0066] Referring to the drawing, the image display device (100) may include a display (180).

[0067] Meanwhile, the display (180) may be implemented as any one of various panels. For example, the display (180) may be any one of a liquid crystal display panel (LCD panel), an organic light-emitting panel (OLED panel), an inorganic light-emitting panel (LED panel), etc.

[0068] Meanwhile, a video display device (100) according to one embodiment of the present disclosure includes a liquid crystal display panel (210 of FIG. 4), a first circuit board (MD of FIG. 8a) including a signal processing device (170 of FIG. 8a) and a power manager (233 of FIG. 8a), a second circuit board (SPa, SPb) having connectors (CTab, CTbb) for connection with the power manager (233) in the first circuit board (MD) and a plurality of input ports (PTI1 to PTIn) connected to the connectors (CTab, CTbb) and outputting a driving voltage to the panel (210), and cables (CBa, CBb) connected between the plurality of ports (PTa to PTd, PT1 to PT40) of the power manager (233) and the connectors (CTab, CTbb).

[0069] Meanwhile, the power manager (233) in the image display device (100) according to one embodiment of the present disclosure changes the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connectors (CTab, CTbb).

[0070] Accordingly, it is possible to stably display an image despite the attachment of a foreign substance (OTa or OTb) to the display (180). In particular, it is possible to limit overcurrent protection caused by a foreign substance (OTa or OTb) attached to the display (180).

[0071] Meanwhile, a video display device (100b) according to another embodiment of the present disclosure includes a first circuit board (MD of FIG. 8a) including an organic light-emitting panel (210b of FIG. 13), a signal processing device (170 of FIG. 8a), and a power manager (233 of FIG. 8a), a second circuit board (SPa, SPb) having connectors (CTab, CTbb) for connection with the power manager (233) in the first circuit board (MD), a plurality of input ports (PTI1 to PTIn) connected to the connectors (CTab, CTbb) and outputting a driving voltage to the panel (210), and cables (CBa, CBb) connected between the plurality of ports (PTa to PTd, PT1 to PT40) of the power manager (233) and the connectors (CTab, CTbb).

[0072] Meanwhile, the power manager (233) in the image display device (100b) according to another embodiment of the present disclosure varies the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connectors (CTab, CTbb).

[0073] Accordingly, it is possible to stably display an image despite the attachment of a foreign substance (OTa or OTb) to the display (180b). In particular, it is possible to limit overcurrent protection caused by a foreign substance (OTa or OTb) attached to the display (180b).

[0074] Meanwhile, the video display device (100) of Fig. 1 can be a TV, monitor, tablet PC, mobile terminal, etc.

[0075] Figure 2 is an example of an internal block diagram of the video display device of Figure 1.

[0076] Referring to FIG. 2, an image display device (100) according to an embodiment of the present disclosure may include an image receiving unit (105), an external device interface unit (130), a storage unit (140), a user input interface unit (150), a sensor unit (not shown), a signal processing unit (170), a display (180), and an audio output unit (185).

[0077] The video receiving unit (105) may include a tuner unit (110), a demodulation unit (120), a network interface unit (130), and an external device interface unit (130).

[0078] Meanwhile, unlike the drawing, the video receiving unit (105) may include only a tuner unit (110), a demodulator unit (120), and an external device interface unit (130). That is, it may not include a network interface unit (130).

[0079] The tuner unit (110) selects an RF broadcast signal corresponding to a channel selected by the user or all pre-stored channels among RF (Radio Frequency) broadcast signals received through an antenna (not shown). In addition, it converts the selected RF broadcast signal into an intermediate frequency signal or a baseband video or audio signal.

[0080] For example, if the selected RF broadcast signal is a digital broadcast signal, it is converted into a digital IF signal (DIF), and if it is an analog broadcast signal, it is converted into an analog baseband video or audio signal (CVBS / SIF). That is, the tuner unit (110) can process a digital broadcast signal or an analog broadcast signal. The analog baseband video or audio signal (CVBS / SIF) output from the tuner unit (110) can be directly input to the signal processing device (170).

[0081] Meanwhile, the tuner unit (110) may be equipped with multiple tuners to receive broadcast signals of multiple channels. Alternatively, a single tuner that simultaneously receives broadcast signals of multiple channels is also possible.

[0082] The demodulation unit (120) receives the digital IF signal (DIF) converted from the tuner unit (110) and performs a demodulation operation.

[0083] The demodulator (120) can output a stream signal (TS) after performing demodulation and channel decoding. At this time, the stream signal may be a signal in which a video signal, an audio signal, or a data signal is multiplexed.

[0084] The stream signal output from the demodulator (120) can be input to the signal processing device (170). The signal processing device (170) performs demultiplexing, image / audio signal processing, etc., and then outputs an image to the display (180) and outputs an audio to the audio output device (185).

[0085] The external device interface unit (130) can transmit or receive data to or from a connected external device (not shown), for example, a set-top box (50). To this end, the external device interface unit (130) may include an A / V input / output unit (not shown).

[0086] The external device interface unit (130) can be connected to external devices such as a DVD (Digital Versatile Disk), Blu-ray, game device, camera, camcorder, computer (laptop), set-top box, etc., via wired / wireless connection, and can also perform input / output operations with the external devices.

[0087] The A / V input / output unit can receive video and audio signals from an external device. Meanwhile, the wireless communication unit (not shown) can perform short-range wireless communication with other electronic devices.

[0088] Through this wireless communication unit (not shown), the external device interface unit (130) can exchange data with an adjacent mobile terminal (600). In particular, the external device interface unit (130) can receive device information, running application information, application images, etc. from the mobile terminal (600) in mirroring mode.

[0089] The network interface unit (135) provides an interface for connecting the video display device (100) to a wired / wireless network, including the Internet. For example, the network interface unit (135) can receive content or data provided by the Internet, a content provider, or a network operator via a network.

[0090] Meanwhile, the network interface unit (135) may include a wireless communication unit (not shown).

[0091] The storage unit (140) may store programs for each signal processing and control within the signal processing device (170), and may also store signal-processed image, voice, or data signals.

[0092] In addition, the storage unit (140) may also perform a function for temporary storage of video, audio, or data signals input to the external device interface unit (130). In addition, the storage unit (140) may store information regarding a specific broadcast channel through a channel memory function such as a channel map.

[0093] Although the storage unit (140) of FIG. 2 illustrates an embodiment in which the storage unit (140) is provided separately from the signal processing device (170), the scope of the present disclosure is not limited thereto. The storage unit (140) may be included within the signal processing device (170).

[0094] The user input interface unit (150) transmits a signal input by the user to the signal processing device (170) or transmits a signal from the signal processing device (170) to the user.

[0095] For example, a user input signal such as power on / off, channel selection, screen setting, etc. may be transmitted / received from a remote control device (200), a user input signal input from a local key (not shown) such as a power key, a channel key, a volume key, a setting value, etc. may be transmitted to a signal processing device (170), a user input signal input from a sensor unit (not shown) that senses a user's gesture may be transmitted to the signal processing device (170), or a signal from the signal processing device (170) may be transmitted to a sensor unit (not shown).

[0096] The signal processing device (170) can demultiplex an input stream or process demultiplexed signals through a tuner unit (110), a demodulator unit (120), a network interface unit (135), or an external device interface unit (130) to generate and output a signal for video or audio output.

[0097] For example, the signal processing device (170) can receive a broadcast signal or an HDMI signal received from the image receiving unit (105), perform signal processing based on the received broadcast signal or HDMI signal, and output a signal-processed image signal.

[0098] An image signal processed by a signal processing device (170) may be input to a display (180) and displayed as an image corresponding to the image signal. In addition, an image signal processed by a signal processing device (170) may be input to an external output device through an external device interface unit (130).

[0099] The voice signal processed in the signal processing device (170) can be output as sound to the audio output unit (185). In addition, the voice signal processed in the signal processing device (170) can be input to an external output device through the external device interface unit (130).

[0100] Although not illustrated in FIG. 2, the signal processing device (170) may include a demultiplexing unit, an image processing unit, etc. That is, the signal processing device (170) may perform various signal processing operations and, accordingly, may be implemented in the form of a system on chip (SOC). This will be described later with reference to FIG. 3.

[0101] In addition, the signal processing device (170) can control the overall operation within the video display device (100). For example, the signal processing device (170) can control the tuner unit (110) to select (tune) an RF broadcast corresponding to a channel selected by a user or a pre-stored channel.

[0102] In addition, the signal processing device (170) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0103] Meanwhile, the signal processing device (170) can control the display (180) to display an image. At this time, the image displayed on the display (180) may be a still image or a moving image, and may be a 2D image or a 3D image.

[0104] Meanwhile, the signal processing device (170) can cause a predetermined object to be displayed within an image displayed on the display (180). For example, the object can be at least one of a connected web screen (newspaper, magazine, etc.), an EPG (Electronic Program Guide), various menus, widgets, icons, still images, videos, and text.

[0105] Meanwhile, the signal processing device (170) can recognize the user's location based on an image captured from a camera (not shown). For example, the distance (z-axis coordinate) between the user and the image display device (100) can be determined. In addition, the x-axis coordinate and y-axis coordinate within the display (180) corresponding to the user's location can be determined.

[0106] The display (180) generates a driving signal by converting a video signal, data signal, OSD signal, control signal, etc. processed by the signal processing device (170) or a video signal, data signal, control signal, etc. received from the external device interface unit (130).

[0107] Meanwhile, the display (180) is configured as a touch screen and can be used as an input device in addition to an output device.

[0108] The audio output unit (185) receives a signal processed by the signal processing device (170) and outputs it as voice.

[0109] A camera unit (not shown) photographs a user. The camera unit (not shown) may be implemented with a single camera, but is not limited thereto, and may also be implemented with multiple cameras. Image information captured by the camera unit (not shown) may be input to a signal processing device (170).

[0110] The signal processing device (170) can detect the user's gesture based on an image captured from a shooting unit (not shown) or a signal detected from a sensor unit (not shown), or a combination thereof.

[0111] The power supply unit (190) supplies power to the entire image display device (100). In particular, the power supply unit (190) can supply power to a signal processing device (170) that can be implemented in the form of a system on chip (SOC), a display (180) for image display, and an audio output unit (185) for audio output.

[0112] Specifically, the power supply unit (190) may be equipped with a converter that converts AC voltage into DC voltage and a dc / dc converter that converts the level of the DC voltage.

[0113] The remote control device (200) transmits user input to the user input interface unit (150). To this end, the remote control device (200) may use Bluetooth, RF (Radio Frequency) communication, IR (Infrared) communication, UWB (Ultra Wideband), ZigBee, etc. In addition, the remote control device (200) may receive video, audio, or data signals output from the user input interface unit (150) and display or output the same as audio on the remote control device (200).

[0114] Meanwhile, the above-described video display device (100) may be a digital broadcast receiver capable of receiving fixed or mobile digital broadcasts.

[0115] Meanwhile, the block diagram of the image display device (100) illustrated in FIG. 2 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the image display device (100) actually implemented. That is, two or more components may be combined into one component, or one component may be subdivided into two or more components, as needed. In addition, the functions performed by each block are intended to explain the embodiment of the present disclosure, and the specific operations or devices thereof do not limit the scope of the present disclosure.

[0116] Figure 3 is an example of an internal block diagram of the signal processing device of Figure 2.

[0117] Referring to the drawings, a signal processing device (170) according to an embodiment of the present disclosure may include a demultiplexing unit (310), an image processing unit (320), a processor (330), and an audio processing unit (370). In addition, a data processing unit (not shown) may be further included.

[0118] The demultiplexer (310) demultiplexes the input stream. For example, when MPEG-2 TS is input, it can be demultiplexed to separate it into video, audio, and data signals, respectively. Here, the stream signal input to the demultiplexer (310) may be a stream signal output from the tuner (110), the demodulator (120), or the external device interface (130).

[0119] The image processing unit (320) can perform signal processing on an input image. For example, the image processing unit (320) can perform image processing on an image signal demultiplexed from the demultiplexing unit (310).

[0120] To this end, the image processing unit (320) may include an image decoder (325), a scaler (335), an image quality processing unit (635), an image encoder (not shown), an OSD processing unit (340), a frame rate conversion unit (350), and a formatter (360).

[0121] The video decoder (325) decodes the demultiplexed video signal, and the scaler (335) scales the resolution of the decoded video signal so that it can be output on the display (180).

[0122] The video decoder (325) can be equipped with decoders of various standards. For example, it can be equipped with an MPEG-2, H.264 decoder, a 3D video decoder for color images and depth images, a decoder for multi-view images, etc.

[0123] The scaler (335) can scale an input video signal that has been decoded by a video decoder (325), etc.

[0124] For example, the scaler (335) can upscale when the size or resolution of the input image signal is small, and downscale when the size or resolution of the input image signal is large.

[0125] The image quality processing unit (635) can perform image quality processing on an input image signal for which image decoding has been completed in the image decoder (325), etc.

[0126] For example, the image quality processing unit (635) may perform noise removal processing of an input image signal, expand the resolution of the gradation of an input image signal, perform image resolution enhancement, perform signal processing based on high dynamic range (HDR), vary the frame rate, or perform image quality processing corresponding to panel characteristics, particularly organic light-emitting panels.

[0127] The OSD processing unit (340) generates an OSD signal based on user input or on its own. For example, based on a user input signal, a signal for displaying various information in the form of graphics or text on the screen of the display (180) may be generated. The generated OSD signal may include various data such as the user interface screen of the image display device (100), various menu screens, widgets, and icons. In addition, the generated OSD signal may include a 2D object or a 3D object.

[0128] In addition, the OSD processing unit (340) can generate a pointer that can be displayed on the display based on a pointing signal input from the remote control device (200). In particular, such a pointer can be generated from a pointing signal processing device, and the OSD processing unit (240) can include such a pointing signal processing device (not shown). Of course, it is also possible for the pointing signal processing device (not shown) to be provided separately rather than being included within the OSD processing unit (240).

[0129] The frame rate converter (FRC) (350) can convert the frame rate of an input video. Meanwhile, the frame rate converter (350) can also output the video as is without a separate frame rate conversion.

[0130] Meanwhile, the formatter (360) can change the format of an input video signal into a video signal for display on a display and output it.

[0131] In particular, the formatter (360) can change the format of the video signal to correspond to the display panel.

[0132] Meanwhile, the formatter (360) can also change the format of the video signal. For example, the format of the 3D video signal can be changed to any one of various 3D formats, such as a side-by-side format, a top-down format, a frame sequential format, an interlaced format, and a checker box format.

[0133] The processor (330) can control the overall operation within the image display device (100) or the signal processing device (170).

[0134] For example, the processor (330) can control the tuner (110) to select (tune) an RF broadcast corresponding to a channel selected by the user or a pre-stored channel.

[0135] In addition, the processor (330) can control the image display device (100) by a user command or internal program input through the user input interface unit (150).

[0136] Additionally, the processor (330) can perform data transmission control with the network interface unit (135) or the external device interface unit (130).

[0137] Additionally, the processor (330) can control the operation of the demultiplexing unit (310), the image processing unit (320), etc., within the signal processing device (170).

[0138] Meanwhile, the audio processing unit (370) within the signal processing device (170) can perform audio processing of the demultiplexed audio signal. For this purpose, the audio processing unit (370) can be equipped with various decoders.

[0139] Additionally, the audio processing unit (370) within the signal processing device (170) can process bass, treble, volume control, etc.

[0140] A data processing unit (not shown) within a signal processing device (170) can perform data processing on a demultiplexed data signal. For example, if the demultiplexed data signal is an encoded data signal, it can be decoded. The encoded data signal may be electronic program guide information (EPG) information that includes broadcast information such as the start time and end time of a broadcast program broadcast on each channel.

[0141] Meanwhile, the block diagram of the signal processing device (170) illustrated in FIG. 3 is a block diagram for one embodiment of the present disclosure. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the signal processing device (170) actually implemented.

[0142] In particular, the frame rate conversion unit (350) and formatter (360) may be provided separately from the image processing unit (320).

[0143] Figure 4 is an example of an internal block diagram of the display of Figure 2.

[0144] Referring to the drawing, a display (180) based on a liquid crystal display (LCD panel) may include a liquid crystal display (210), a driving controller (230), a driving driver (238), and a backlight (250).

[0145] A liquid crystal panel (210) includes a first substrate on which a plurality of gate lines (GL) and data lines (DL) are arranged in a matrix form to cross each other to display an image, and thin film transistors and pixel electrodes connected thereto are formed in the crossing area, a second substrate having a common electrode, and a liquid crystal layer formed between the first substrate and the second substrate.

[0146] Based on various signals from the drive controller (230), signal processing device (170), and drive voltage from the power supply unit (190), signals can be output to the drive driver (238).

[0147] For this purpose, the drive controller (230) may include a timing controller (232) and a power manager (233).

[0148] The timing controller (232) can receive a control signal, R, G, B image signal, vertical synchronization signal (Vsync), etc. from the signal processing device (170), and output a gate control signal and a data control signal based on the control signal.

[0149] Meanwhile, the power manager (233) can boost the voltage of the gate control signal and data control signal from the timing controller (232) and output the boosted gate control signal and the boosted data control signal.

[0150] Next, the gate driver (234) and the data driver (236) within the driving driver (238) can supply scan signals and data signals to the liquid crystal panel (210) through the gate line (GL) and the data line (DL), based on the boosted gate control signal and the boosted data control signal, respectively.

[0151] Meanwhile, the backlight (250) supplies light to the liquid crystal panel (210). To this end, the backlight (250) may include a backlight (252) including a plurality of light sources, a scan driving unit (254) that controls scanning driving of the backlight (252), and a light source driving unit (256) that turns the backlight (252) on / off.

[0152] A predetermined image is displayed using light emitted from a backlight (250) while the light transmittance of the liquid crystal layer is controlled by an electric field formed between the pixel electrode and the common electrode of the liquid crystal panel (210).

[0153] Meanwhile, the power supply unit (190) or power manager (233) can supply a common electrode voltage (Vcom) to the liquid crystal panel (210) and a gamma voltage to the data driver (236). In addition, it can supply a driving voltage to the backlight (250) to drive the backlight (252).

[0154] Figure 5 is an example of an internal circuit diagram of the power supply unit of Figure 2.

[0155] Referring to the drawing, the image display device (100) of FIG. 5 may include a display (180) including a power supply unit (190), a microcomputer (750), a relay (755), a timing controller (232), a power manager (233), and a panel (210).

[0156] When the plug (PLG) is connected to the outlet, AC voltage (Vac) is supplied to the power supply unit (190), and when the plug (PLG) is removed from the outlet, AC voltage is not supplied to the power supply unit (190).

[0157] The power supply unit (190) may include an ac / dc converter (710) that converts alternating current voltage (Vac) into a direct current voltage, a first dc / dc converter (715) that converts the level of the direct current voltage, a second dc / dc converter (720) that converts the level of the direct current voltage, a standby unit (725) that supplies standby power based on a counter (726) when the power is off, a control unit (910), etc.

[0158] Meanwhile, when a power-on signal is received from the remote control device (200), the relay (755) operates, and an operation signal (RL) can be input to the microcomputer (750).

[0159] The microcomputer (750) receives operating power (V1) from the power supply unit (190), operates, and can output a power control signal (Vdd_CL) to the power supply unit (190).

[0160] The power supply unit (190) outputs operating power (Vdd) to the timing controller (232) or the power manager (233) in response to the power control signal (Vdd_CL), and outputs a driving voltage (Vdr) to the panel (210), and the timing controller (232) or the power manager (233) can output operating power (Vdd) to the panel (210).

[0161] Meanwhile, a second dc / dc converter (720), a display (180), etc. are connected to the output terminal of the ac / dc converter (710), and accordingly, the second dc / dc converter (720), the display (180), etc. may be referred to as a load (LOAD) based on the converter (710).

[0162] Meanwhile, it is preferable that the AC / DC converter (710) be equipped with a switching element for efficient supply of high power in accordance with the trend of increasing display resolution of the display (180).

[0163] To this end, the control unit (910) can control the switching of the switching element within the ac / dc converter (710).

[0164] Fig. 6a is an example of a rear view of the image display device of Fig. 1. In particular, Fig. 6a illustrates an example of a rear view of the image display device (100) with the frame of the image display device (100) removed.

[0165] Referring to the drawing, the image display device (100) includes a first circuit board (MD) including a signal processing device (170) and a power manager (233), a connector (CTab, CTbb) for connection with the power manager (233) within the first circuit board (MD), a second circuit board (SPa, SPb) for outputting a driving voltage to a panel (210), and cables (CBa, CBb) connected between a plurality of ports (PTa to PTd, PT1 to PT40 of FIG. 9a) of the power manager (233) and the connectors (CTab, CTbb).

[0166] Meanwhile, the video display device (100) may further include a power board (PD) for supplying power to the panel (210) within the display (180). The power board (PD) at this time may include the power supply unit (190) of FIG. 5.

[0167] That is, a power board (PD), a first circuit board (MD), a second circuit board (SPa, SPb), and cables (CBa, CBb) can be arranged on the back of the video display device (100).

[0168] Meanwhile, the connectors (CT1, CT2) formed at one end of the cable (CBa, CBb) can be connected to connectors formed on the first circuit board (MD).

[0169] Meanwhile, the connectors (CTaa, CTba) formed at the other end of the cable (CBa, CBb) can be connected to the connectors (CTab, CTbb) formed on the second circuit board (SPa, SPb), respectively.

[0170] That is, the first connector (CTaa) formed at the other end of the first cable (CBa) can be connected to a connector (CTab) formed at the second circuit board (SPa), and the second connector (CTba) formed at the other end of the second cable (CBb) can be connected to a connector (CTbb) formed at the second circuit board (SPb), respectively.

[0171] Meanwhile, the first circuit board (MD) may be called a main board and may include a signal processing device (170) and a power manager (233).

[0172] Meanwhile, the signal processing device (170) may additionally include a timing controller (232) of FIG. 4 in addition to each component of FIG. 3.

[0173] Meanwhile, the second circuit board (SPa, SPb) may be equipped with a driving driver (238) that outputs a driving voltage to the panel (210). The driving driver (238) at this time may also be called a source driver.

[0174] Meanwhile, the video display device (100) may further include a plurality of audio output units (SPCa, SPCb) connected to the first circuit board (MD).

[0175] Figures 6b to 6c are drawings referenced in the description of Figure 6a.

[0176] Figure 6b illustrates that a connector (CT1) at the end of a cable (CBa) is coupled to a connector (CTab) in the second circuit board (SPa) of Figure 6a.

[0177] Accordingly, a clock signal or driving voltage from the power manager (233) is supplied to the second circuit board (SPa).

[0178] Figure 6c illustrates that the connector (CT1) at the end of the cable (CBa) is removed from the connector (CTab) in the second circuit board (SPa) of Figure 6a.

[0179] Accordingly, the clock signal or driving voltage from the power manager (233) is not supplied to the second circuit board (SPa).

[0180] Meanwhile, referring to FIGS. 6b to 6c, the second circuit board (SPa) has a plurality of input ports (PTI1 to PTIn) connected to a connector (CTab).

[0181] Meanwhile, the second circuit board (SPa) may further include a plurality of output ports (PTO1 to PTOn) for outputting a driving voltage to the panel (210).

[0182] The video display device (100) may further include a flexible cable (FCa) that is connected to a plurality of output ports (PTO1 to PTOn) and outputs a driving voltage or control signal to the panel (210).

[0183] Accordingly, a clock signal or driving voltage from the power manager (233) is supplied to the panel (210) via the second circuit board (SPa).

[0184] Figures 7a and 7b are drawings illustrating foreign substances being attached to a display.

[0185] Figure 7a illustrates an example of an input port (PTIb) within a second circuit board (SPa).

[0186] Referring to the drawing, the input port (PTIb) in the second circuit board (SPa) may have a plurality of input ports (PTI1 to PTIn) such as those in FIG. 6b.

[0187] At this time, multiple input ports (PTI1 to PTIn) can be arranged in a rectangular shape, spaced apart from each other.

[0188] Meanwhile, foreign substances (OTa), such as hair or dust, may be attached to some of the multiple input ports (PTI1 to PTIn).

[0189] In the drawing, a foreign substance (OTa) may be attached across the 11th input port (PTI11b) and the 12th input port (PTI12b), which are some of the multiple input ports (PTI1 to PTIn).

[0190] In this case, a short occurs between the 11th input port (PTI11b) and the 12th input port (PTI12b), which are some of the multiple input ports (PTI1 to PTIn), and the current flowing through the 11th input port (PTI11b) and the 12th input port (PTI12b) may significantly increase.

[0191] Meanwhile, the voltage output from each port from the power manager (233) is supplied to multiple input ports (PTI1 to PTIn) via a cable (CBa) and a connector (CTab), so when a foreign substance (OTa) is attached, a considerably large current flows to the ports corresponding to the first input port (PTI11b) and the twelfth input port (PTI12b) among the ports from the power manager (233).

[0192] Accordingly, the power manager (233) is turned off based on overcurrent protection, and eventually, the supply of driving voltage to the panel (210) is stopped, so that no image is displayed on the display (180).

[0193] Again, even if the power is turned on, due to the attachment of foreign matter (OTa), the supply of driving voltage to the panel (210) is interrupted, and an image cannot be displayed on the display (180).

[0194] Figure 7b illustrates another example of an input port (PTIc) within a second circuit board (SPa).

[0195] Referring to the drawing, the input port (PTIc) in the second circuit board (SPa) may have a plurality of input ports (PTI1 to PTIn) such as those in FIG. 6b.

[0196] At this time, the plurality of input ports (PTI1 to PTIn) may be arranged in a rectangular shape, spaced apart from each other. In particular, the plurality of input ports (PTI1 to PTIn) may be connected to a base (BS) and arranged in a rectangular shape.

[0197] Meanwhile, foreign matter (OTb), such as hair or dust, may be attached to some of the multiple input ports (PTI1 to PTIn).

[0198] In the drawing, a foreign substance (OTb) may be attached across the 11th input port (PTI11c) and the 12th input port (PTI12c), which are some of the multiple input ports (PTI1 to PTIn).

[0199] In this case, a short occurs between the 11th input port (PTI11c) and the 12th input port (PTI12c), which are some of the multiple input ports (PTI1 to PTIn), and the current flowing through the 11th input port (PTI11c) and the 12th input port (PTI12c) may significantly increase.

[0200] Meanwhile, the voltage output from each port from the power manager (233) is supplied to multiple input ports (PTI1 to PTIn) via a cable (CBa) and a connector (CTab), so when a foreign substance (OTb) is attached, a considerably large current flows to the ports corresponding to the first input port (PTI11c) and the twelfth input port (PTI12c) among the ports from the power manager (233).

[0201] Accordingly, the power manager (233) is turned off based on overcurrent protection, and eventually, the supply of driving voltage to the panel (210) is stopped, so that no image is displayed on the display (180).

[0202] Again, even if the power is turned on, due to the attachment of foreign matter (OTb), the supply of driving voltage to the panel (210) is interrupted, so that an image cannot be displayed on the display (180).

[0203] Figures 7c to 7d are drawings referenced in the description of Figures 7a to 7b.

[0204] Figure 7c illustrates that an image (711) is displayed on the display (180) before attachment of a foreign substance (OTa, OTb).

[0205] FIG. 7d illustrates that the display (180) is turned off based on overcurrent protection after attachment of foreign substances (OTa, OTb).

[0206] As shown in FIGS. 7a and 7b, when foreign substances (OTa, OTb) are attached, unlike cracks in the panel (210) that cause temperature rise and current increase, the temperature does not rise, so it is preferable not to operate overcurrent protection.

[0207] Accordingly, in this disclosure, a method is proposed to vary or limit the overcurrent protection operation when a foreign substance (OTa, OTb) is attached. This is described with reference to FIG. 10a and below.

[0208] FIG. 8A is an example of an internal circuit diagram of an image display device according to one embodiment of the present disclosure.

[0209] Referring to the drawings, an image display device (100) according to one embodiment of the present disclosure includes a panel (210), a first circuit board (MD) including a signal processing device (170) and a power manager (233), a connector (CTab, CTbb) for connection with the power manager (233) in the first circuit board (MD), a second circuit board (SPa, SPb) having a plurality of input ports (PTI1 to PTIn) connected to the connectors (CTab, CTbb) and outputting a driving voltage to the panel (210), and cables (CBa, CBb) connected between the plurality of ports (PTa to PTd, PT1 to PT40) of the power manager (233) and the connectors (CTab, CTbb).

[0210] Meanwhile, the signal processing device (170) may additionally include a timing controller (232) in addition to each component of FIG. 3.

[0211] Meanwhile, the power manager (233) performs I2C communication with the signal processing device (170) and can transmit a fault signal to the signal processing device (170).

[0212] For example, the power manager (233) can output a high level fault signal when overcurrent protection does not operate, and can output a low level fault signal when overcurrent protection operates.

[0213] Meanwhile, the signal processing device (170) can transmit an enable signal or a data (tcom data) signal to the power manager (233).

[0214] For example, the power manager (233) can be turned off while outputting a low level fault signal when overcurrent protection is activated.

[0215] At this time, the signal processing device (170) can control the power manager (233) to turn on again by outputting an ENABLE signal when receiving a low level fault signal.

[0216] Meanwhile, the signal processing device (170) can receive current level information flowing to the power manager (233) through I2C communication.

[0217] Meanwhile, the signal processing device (170) may not output an ENABLE signal even if it receives a low-level fault signal if the current level information received via I2C communication exceeds the allowable value and determines that it is a panel crack or the like. Accordingly, the power manager (233) and the panel (210) may be turned off.

[0218] Meanwhile, the signal processing device (170) may output an ENABLE signal when it receives a low-level fault signal while the current level information received through I2C communication is below the allowable level, and determines that a foreign substance has been added, etc. Accordingly, the power manager (233) and the panel (210) may be turned on.

[0219] In the drawing, it is illustrated that a plurality of second circuit boards (SPa, SPb) are provided, but this is not limited to this, and it is also possible to implement it with a single circuit board.

[0220] Meanwhile, the second circuit board (SPa, SPb) may be provided with a connector (CTab, CTbb) connected to a cable (CBa, CBb), a plurality of input ports (PTIa, PTIb) connected to the connector (CTab, CTbb), and a plurality of input ports (PTOa, PTOb) connected to a flexible cable (FCa, FCb).

[0221] Meanwhile, the second circuit board (SPa, SPb) may further include a source driver (SDa, SDb) for driving voltage output between the plurality of input ports (PTIa, PTIb) and the plurality of input ports (PTOa, PTOb).

[0222] The source driver (SDa, SDb) at this time can correspond to the driving driver (238) of Fig. 4.

[0223] Meanwhile, the driving voltage output from the second circuit board (SPa, SPb) is supplied to the panel (210) through the flexible cable (FCa, FCb).

[0224] Meanwhile, the video display device (100) may further include a power board (PD) for supplying power to a panel (210) or main board (MD) within the display (180).

[0225] FIG. 8b is another example of an internal circuit diagram of a video display device according to one embodiment of the present disclosure.

[0226] Referring to the drawing, the image display device (100a) of FIG. 8b is similar to the image display device (100) of FIG. 8a, but differs in that the signal processing device (170) and the timing controller (232) within the first circuit board (MDb) are separated.

[0227] Meanwhile, the power manager (233) performs I2C communication with the timing controller (232) and can transmit a fault signal to the timing controller (232).

[0228] For example, the power manager (233) can output a high level fault signal when overcurrent protection does not operate, and can output a low level fault signal when overcurrent protection operates.

[0229] Meanwhile, the timing controller (232) can transmit an enable signal or a data (tcom data) signal to the power manager (233).

[0230] For example, the power manager (233) can be turned off while outputting a low level fault signal when overcurrent protection is activated.

[0231] At this time, the timing controller (232) can control the power manager (233) to turn on again by outputting an ENABLE signal when receiving a low level fault signal.

[0232] Meanwhile, the timing controller (232) can receive current level information flowing to the power manager (233) through I2C communication.

[0233] Meanwhile, the timing controller (232) may not output an ENABLE signal even if it receives a low-level fault signal if the received current level information exceeds the allowable value, such as a panel crack. Accordingly, the power manager (233) and the panel (210) may be turned off.

[0234] Meanwhile, when the timing controller (232) receives a low-level fault signal through I2C communication while the current level information received is below the allowable level, it may determine that a foreign substance has been added, etc., and output an enable signal. Accordingly, the power manager (233) and the panel (210) may be turned on.

[0235] Figures 9a and 9b are drawings referenced in the description of Figures 8a and 8b.

[0236] First, Fig. 9a is a drawing illustrating a power manager (233).

[0237] Referring to the drawing, the power manager (233) may have a plurality of ports (PTa to PTd, PT1 to PT40) for data exchange with a signal processing device (170) or a timing controller (232).

[0238] For example, the power manager (233) may be equipped with a port (PTa) that performs I2C communication for transmitting current level information, etc., a port (PTb) that outputs a fault signal, a port (PTc) that receives an enable signal, and a port (PTd) that receives a data (tcom data) signal.

[0239] Meanwhile, the power manager (233) may be equipped with multiple ports (PT1 to PT40) for connection with cables (CBa, CBb).

[0240] For example, the power manager (233) may be provided with a plurality of ports (PT1 to PT20) for connection with the first cable (CBa) and a plurality of ports (PT21 to PT40) for connection with the second cable (CBb).

[0241] Meanwhile, a plurality of ports (PT1 to PT20) of the power manager (233) can be electrically connected to a plurality of input ports (PTI1 to PTIn) within the second circuit board (SPa) via the first cable (CBa) and the connector (CTab) within the second circuit board (SPa).

[0242] Meanwhile, a plurality of ports (PT21 to PT40) of the power manager (233) can be electrically connected to a plurality of input ports within the second circuit board (SPb) via a second cable (CBab, connector (CTbb) within the second circuit board (SPb).

[0243] Figure 9b is a drawing referenced in the description of the port of the power manager (233) of Figure 9a.

[0244] Referring to the drawing, among the multiple ports (PT1 to PT20) of the power manager (233), the first port (PT1) can output a voltage (VTERM) corresponding to a differential data signal and a driving voltage (VCC) of a source driver (SDa).

[0245] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the second port (PT2) can output the panel driving voltage (HVDD).

[0246] Meanwhile, the level of the panel driving voltage (HVDD) may be higher than the level of the voltage (VTERM) corresponding to the differential data signal (differential data) or the level of the driving voltage (VCC) of the source driver (SDa).

[0247] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the third port (PT3) can output a panel driving voltage (VDD). The level of the panel driving voltage (VDD) can be higher than the level of the panel driving voltage (HVDD).

[0248] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the fourth port (PT4) can output a common voltage (VCOM) and a first gate voltage (VGL1).

[0249] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the fifth port (PT5) can output a panel driving voltage (VST). At this time, the panel driving voltage (VST) can correspond to the frame start voltage.

[0250] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the sixth port (PT6) can output a panel driving voltage (RST). At this time, the panel driving voltage (RST) can correspond to a frame reset voltage.

[0251] Next, the seventh port (PT7) among the multiple ports (PT1 to PT20) of the power manager (233) can output the second gate voltage (VGL2).

[0252] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the 8th port (PT8) can output the panel driving voltage (VGH_EVEN), and the 9th port (PT9) can output the panel driving voltage (VGH_OFF).

[0253] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the 10th port (PT10) can output a null driving voltage (VGH).

[0254] Next, among the multiple ports (PT1 to PT20) of the power manager (233), the 11th to 20th ports (PT11 to PT20) can output multiple gate signals (CLK1 to CLK10).

[0255] Meanwhile, among the multiple ports (PT1 to PT20) of the power manager (233), the 11th to 20th ports (PT11 to PT20) may be named clock ports.

[0256] Meanwhile, the power manager (233) can detect current flowing in multiple ports (PT1 to PT20) and perform overcurrent protection based on the detected current.

[0257] For example, the power manager (233) can detect the current flowing in ports (PT2, PT4 to PT20) excluding the first port (PT1) and the third port (PT3) among a plurality of ports (PT1 to PT20), and perform overcurrent protection based on the detected current.

[0258] Specifically, the power manager (233) can perform an overcurrent protection operation based on a setting level for overcurrent protection for each port (PT2, PT4 to PT20).

[0259] Meanwhile, the power manager (233) outputs a fault signal (Sft) converted from a high level to a low level at the time Tbb through the fault port (PTb) when the detected current is higher than the set level for overcurrent protection, and is turned off.

[0260] Accordingly, the signal output from the power manager (233) is not supplied to the second circuit board (SPa, SPb), and as a result, the panel (210) is not driven. As a result, protection of internal circuit elements or protection of the panel (210) can be performed.

[0261] Meanwhile, as shown in FIGS. 7a and 7b, when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) in the second circuit board (SPa), unlike a crack in the panel (210) that causes a temperature rise and an increase in current, it is preferable not to operate overcurrent protection because the temperature does not rise.

[0262] Accordingly, in this disclosure, a method is proposed to vary or limit the overcurrent protection operation when a foreign substance (OTa, OTb) is attached. This is described with reference to FIG. 10a and below.

[0263] FIG. 10a is a flowchart showing an operation method of an image display device according to an embodiment of the present disclosure.

[0264] Referring to the drawing, the image display device (100) is powered on based on a power-on signal or the like (S1010).

[0265] Accordingly, the power supply unit (190) can supply DC voltage to a power manager (233), etc.

[0266] Meanwhile, the power manager (233) can be turned on based on the DC voltage from the power supply unit (190) after power-on (S1015).

[0267] Next, the signal processing device (170) or the timing controller (232) determines whether a foreign substance is attached to a part of the input port (PTI) or a part of the output port (PTO) in the second circuit board (SPa) (S1020).

[0268] For example, the signal processing device (170) or the timing controller (232) can receive a fault signal from the power manager (233) and determine whether a foreign substance is attached based on the level of the fault signal.

[0269] Specifically, the signal processing device (170) or the timing controller (232) can determine that a foreign substance is attached when a low level fault signal is received from the power manager (233).

[0270] More specifically, when the signal processing device (170) or the timing controller (232) receives a low-level fault signal while the current level information from the power manager (233) is below the allowable value, it can determine that a foreign substance is attached rather than a panel crack.

[0271] Meanwhile, the signal processing device (170) or timing controller (232) can output an enable signal to the power manager (233) when a foreign substance is attached.

[0272] Meanwhile, the power manager (233) receives an enable signal from the signal processing device (170) or the timing controller (232), and varies the setting level for overcurrent protection based on the enable signal.

[0273] For example, the power manager (233) can increase the setting level for overcurrent protection from the first level (LV1) to the second level (LV2) when a foreign substance is attached to a part of the input port (PTI) or a part of the output port (PTO) within the second circuit board (SPa).

[0274] In this way, by increasing the setting level for overcurrent protection, it is possible to limit overcurrent protection due to foreign matter (OTa or OTb) attached to the display (180).

[0275] That is, by limiting the overcurrent protection operation due to a foreign substance (OTa or OTb) attached to the display (180), it is possible to prevent the power manager (233) from turning off and the panel (210) from turning off.

[0276] Meanwhile, in step 1020 (S1020), the signal processing device (170) or the timing controller (232) may determine that no foreign substance is attached when a high level signal is received from the power manager (233).

[0277] Accordingly, the power manager (233) can maintain the setting level for overcurrent protection as is (S1027).

[0278] For example, the power manager (233) can maintain the setting level for overcurrent protection at the first level (LV1).

[0279] Next, the signal processing device (170) or the timing controller (232) determines whether a crack has occurred in the panel (210) (S1050), and if a crack has occurred in the panel (210), the power manager (233) and the panel (210) can be controlled to be turned off (S1055).

[0280] For example, the power manager (233) can detect current flowing in multiple ports (PT1 to PT20) during operation, and transmit detected current level information to a signal processing device (170) or a timing controller (232) based on the detected current.

[0281] Meanwhile, the signal processing device (170) or timing controller (232) can determine that the received current level information is above the allowable value, such as a panel crack.

[0282] Meanwhile, the power manager (233) may be turned off when a crack occurs in the panel (210) because the current level information is greater than the allowable value set for overcurrent protection.

[0283] Meanwhile, the signal processing device (170) or the timing controller (232) may not transmit an enable signal to the power manager (233) that is in the off state. Accordingly, the power manager (233) and the panel (210) may remain off.

[0284] According to FIG. 10a, the power manager (233) varies the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab). Accordingly, it is possible to stably display an image despite the attachment of a foreign substance (OTa or OTb) to the display (180). In particular, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0285] Meanwhile, the power manager (233) can increase the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) from the first level (LV1) to the second level (LV2) when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab). Accordingly, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0286] Meanwhile, the power manager (233) can sequentially increase the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab). Accordingly, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0287] FIG. 10b is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0288] Referring to the drawing, the image display device (100) is powered on based on a power-on signal or the like (S1010).

[0289] Next, the power manager (233) can be turned on based on the DC voltage from the power supply unit (190) after power-on (S1015).

[0290] Next, the signal processing device (170) or the timing controller (232) determines whether a foreign substance is attached to a part of the input port (PTI) or a part of the output port (PTO) in the second circuit board (SPa) (S1020).

[0291] For example, if the signal processing device (170) or the timing controller (232) receives a low-level fault signal while the current level information of some ports from the power manager (233) is below the allowable value, it may determine that a foreign substance is attached rather than a panel crack.

[0292] As another example, the signal processing device (170) or the timing controller (232) may determine that there is no foreign matter attached when it receives a high level fault signal while the current level information of some other ports from the power manager (233) is below the allowable value.

[0293] Meanwhile, if a foreign substance is attached to a part of an input port (PTI) or a part of an output port (PTO) in the second circuit board (SPa), the signal processing device (170) or the timing controller (232) can control the setting level for overcurrent protection of the corresponding port of the power manager (233) to be varied (S1031).

[0294] For example, as shown in FIG. 7a, when a foreign substance (OTa) is attached across the 11th input port (PTI11b) and the 12th input port (PTI12b) among the plurality of input ports (PTI1 to PTIn) of the second circuit board (SPa), the current level flowing through the 11th port (PT11) and the 12th port (PT12) among the plurality of ports (PT1 to PT20) of the power manager (233) may be equal to or higher than the set level.

[0295] Accordingly, the signal processing device (170) or the timing controller (232) can control the setting level for overcurrent protection of the 11th port (PT11) and the 12th port (PT12) among the multiple ports (PT1 to PT20) of the power manager (233) to vary from the first level to the second level.

[0296] Meanwhile, in step 1020 (S1020), if no foreign matter is attached to a part of the input port (PTI) or a part of the output port (PTO) in the second circuit board (SPa), the signal processing device (170) or the timing controller (232) can control the power manager (233) to maintain the set level for overcurrent protection of the corresponding port as is (S1034).

[0297] For example, as shown in FIG. 7a, when a foreign substance (OTa) is attached across the 11th input port (PTI11b) and the 12th input port (PTI12b) among the plurality of input ports (PTI1 to PTIn) of the second circuit board (SPa), the current level flowing through the 11th port (PT11) and the 12th port (PT12) among the plurality of ports (PT1 to PT20) of the power manager (233) may be equal to or higher than the set level.

[0298] Accordingly, the signal processing device (170) or the timing controller (232) can control the power manager (233) to maintain the set level for overcurrent protection of other ports (PT1 to PT10, PT13 to PT20) except for the 11th port (PT11) and the 12th port (PT12).

[0299] Finally, according to FIG. 10b, when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab), the power manager (233) varies the setting level for overcurrent protection of a port corresponding to some of the plurality of input ports (PTI1 to PTIn) among the plurality of ports (PTa to PTd, PT1 to PT40), and maintains the setting level for overcurrent protection of a port not corresponding to some of the plurality of input ports (PTI1 to PTIn) among the plurality of ports (PTa to PTd, PT1 to PT40). Accordingly, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0300] Specifically, when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab), the power manager (233) can increase the setting level for overcurrent protection of a port corresponding to some of the plurality of input ports (PTI1 to PTIn) among the plurality of ports (PTa to PTd, PT1 to PT40) from the first level (LV1) to the second level (LV2), and maintain the setting level for overcurrent protection of a port not corresponding to some of the plurality of input ports (PTI1 to PTIn) among the plurality of ports (PTa to PTd, PT1 to PT40) at the first level (LV1). Accordingly, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0301] FIG. 10c is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0302] Referring to the drawing, the image display device (100) is powered on based on a power-on signal or the like (S1010).

[0303] Next, the power manager (233) can be turned on based on the DC voltage from the power supply unit (190) after power-on (S1015).

[0304] Next, the power manager (233) detects the current flowing through at least some of the plurality of ports (PT1 to PT20) during operation (S1038).

[0305] Next, the power manager (233) can transmit the detected current information to the signal processing device (170) or the timing controller (232).

[0306] Meanwhile, the power manager (233) is turned off when the detected current information is higher than the first level, which is the set level.

[0307] Meanwhile, the power manager (233) remains on when the detected current information is lower than the first level, which is the set level.

[0308] Next, the signal processing device (170) or the timing controller (232) can determine whether the detected current information is equal to or higher than the first level, which is the set level, and less than the allowable value (S1040).

[0309] Meanwhile, the signal processing device (170) or the timing controller (232) can control to maintain the first level, which is the set level, when the detected current information is lower than the first level, which is the set level (S1041).

[0310] Accordingly, the setting level for overcurrent protection of the power manager (233) can be maintained at the first level.

[0311] Meanwhile, the signal processing device (170) or the timing controller (232) can turn on the turned off power manager (233) again when the detected current information is higher than the first level, which is the set level, and lower than the allowable value (S1042).

[0312] For example, the signal processing device (170) or the timing controller (232) can transmit an enable signal to the power manager (233) when the detected current information is equal to or higher than the first level, which is a set level, and less than the allowable value.

[0313] Accordingly, the turned off power manager (233) is turned on again.

[0314] Next, the power manager (233) can increase the setting level for overcurrent protection from the first level to the second level after being turned on again (S1043).

[0315] Next, the power manager (233) detects the current flowing through at least some of the plurality of ports (PT1 to PT20) during operation.

[0316] Meanwhile, the power manager (233) is turned off when the detected current information is higher than the second level, which is the set level.

[0317] Meanwhile, the power manager (233) remains on when the detected current information is less than the second level, which is the set level.

[0318] Next, the signal processing device (170) or the timing controller (232) can determine whether the detected current information is higher than the second level, which is the set level, and lower than the allowable value (S1044).

[0319] Meanwhile, the signal processing device (170) or the timing controller (232) can control to maintain the second level, which is the set level, when the detected current information is lower than the second level, which is the set level (S1045).

[0320] Accordingly, the setting level for overcurrent protection of the power manager (233) can be maintained at the second level.

[0321] Meanwhile, the signal processing device (170) or the timing controller (232) can turn on the turned off power manager (233) again when the detected current information is higher than the second level, which is the set level, and lower than the allowable value (S1046).

[0322] For example, the signal processing device (170) or the timing controller (232) can transmit an enable signal to the power manager (233) when the detected current information is higher than the second level, which is the set level, and lower than the allowable value.

[0323] Accordingly, the turned off power manager (233) is turned on again.

[0324] Next, the power manager (233) can increase the setting level for overcurrent protection from the second level to the third level after being turned on again (S1048).

[0325] Next, the power manager (233) detects the current flowing through at least some of the plurality of ports (PT1 to PT20) during operation.

[0326] Meanwhile, the power manager (233) is turned off when the detected current information is higher than the third level, which is the set level.

[0327] Meanwhile, the power manager (233) remains on when the detected current information is lower than the set level, which is the third level.

[0328] Next, the signal processing device (170) or the timing controller (232) can determine whether the detected current information is higher than the third level, which is the set level, and higher than the allowable value (S1050).

[0329] Meanwhile, if the detected current information is above the allowable value, the signal processing device (170) or the timing controller (232) determines that there is a crack in the panel (210) and can keep the turned off power manager (233) turned off (S1055).

[0330] For example, the signal processing device (170) or the timing controller (232) may not transmit an enable signal to the power manager (233) if the detected current information is above an allowable value. Accordingly, the turned-off power manager (233) and panel (210) remain turned off.

[0331] That is, according to FIG. 10c, when a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab), the power manager (233) can sequentially increase the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40).

[0332] For example, if a foreign substance (OTa or OTb) is attached to some of the plurality of input ports (PTI1 to PTIn) connected to the connector (CTab), the power manager (233) can sequentially increase the setting level for overcurrent protection of some of the plurality of ports (PTa to PTd, PT1 to PT40) to below the allowable value (Lmt). Accordingly, it is possible to limit overcurrent protection due to a foreign substance (OTa or OTb) attached to the display (180).

[0333] Specifically, the power manager (233) detects a current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40), and if the detected current is equal to or greater than a first level (LV1) and less than a tolerance (Lmt), it is turned off, and after being turned off, it is turned on again, and after being turned on again, it can increase the set level for overcurrent protection from the first level (LV1) to the second level (LV2).

[0334] Meanwhile, the power manager (233) detects the current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40) after increasing the setting level to the second level (LV2), and if the detected current is equal to or higher than the second level (LV2) and less than the allowable value (Lmt), it turns off, turns on again after turning off, and after turning on again, it can increase the setting level for overcurrent protection from the second level (LV2) to the third level (LV3).

[0335] Meanwhile, the power manager (233) can detect the current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40) after increasing the setting level to the second level (LV2), and maintain the setting level at the second level (LV2) when the detected current is less than the second level (LV2).

[0336] Meanwhile, the power manager (233) detects the current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40) after increasing the setting level to the third level (LV3), and if the detected current is higher than the third level (LV3) and lower than the allowable value (Lmt), it turns off, and after turning off, it turns on again, and after turning on again, it can increase the setting level for overcurrent protection from the third level (LV3) to the fourth level (LV4). Accordingly, it is possible to limit overcurrent protection due to foreign substances (OTa or OTb) attached to the display (180).

[0337] Meanwhile, the power manager (233) can detect the current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40) after increasing the setting level to the third level (LV3), and maintain the setting level at the third level (LV3) when the detected current is less than the third level (LV3).

[0338] Meanwhile, the power manager (233) detects the current output from at least some of the multiple ports (PTa to PTd, PT1 to PT40) and can be turned off if the detected current exceeds the allowable value (Lmt). Accordingly, it is possible to limit overcurrent protection due to foreign substances (OTa or OTb) attached to the display (180).

[0339] Meanwhile, the power manager (233) detects the current output from at least some of the plurality of ports (PTa to PTd, PT1 to PT40), and if the detected current is higher than the first level (LV1) which is the set level and lower than the allowable value (Lmt), it is turned off, and when turned off, it can transmit a conversion signal (Sft) from a high level to a low level to the signal processing device (170) through the fault port (PTb).

[0340] FIG. 10d is a flowchart showing an operation method of an image display device according to another embodiment of the present disclosure.

[0341] Referring to the drawing, the image display device (100) is powered on based on a power-on signal or the like (S1010).

[0342] Next, the power manager (233) can be turned on based on the DC voltage from the power supply unit (190) after power-on (S1015).

[0343] Next, the power manager (233) detects the current flowing through at least some of the plurality of ports (PT1 to PT20) during operation.

[0344] Next, the power manager (233) can transmit current information detected for each port (PT1 to PT40) to a signal processing device (170) or a timing controller (232).

[0345] Meanwhile, the power manager (233) can be powered off when the number of ports through which a current exceeding the set level for overcurrent protection flows among each port (PT1 to PT40) is a predetermined number or more.

[0346] Meanwhile, the signal processing device (170) or the timing controller (232) determines whether the number of ports through which a current exceeding a set level for overcurrent protection flows among each port (PT1 to PT40) is a predetermined number or more (S1019), and if so, may not transmit an enable signal to the power manager (233).

[0347] Accordingly, the power manager (233) is continuously turned off when the number of ports in which a current exceeding the set level for overcurrent protection flows among each port (PT1 to PT40) is a predetermined number or more (S1055).

[0348] Meanwhile, in step 1019 (S1019), if the number of ports through which a current exceeding a set level for overcurrent protection flows among each port (PT1 to PT40) is less than a predetermined number, step 1026 (S1026) may be performed.

[0349] Meanwhile, the power manager (233) may be turned off when a current exceeding the set level for overcurrent protection flows through some of the ports (PT1 to PT40).

[0350] In step 1026 (S1026), the signal processing device (170) or the timing controller (232) can determine whether a current exceeding a set level for overcurrent protection flows through some ports of the power manager (233) (S1026), and if so, output an enable signal to the power manager (233).

[0351] Meanwhile, the power manager (233) receives an enable signal from the signal processing device (170) or the timing controller (232), and varies the setting level for overcurrent protection based on the enable signal (S1030).

[0352] For example, the power manager (233) can increase the setting level for overcurrent protection of a part of the input port (PTI) or a part of the output port (PTO) within the second circuit board (SPa) from a first level (LV1) to a second level (LV2).

[0353] In this way, by increasing the setting level for overcurrent protection, it is possible to limit overcurrent protection due to foreign matter (OTa or OTb) attached to the display (180).

[0354] That is, according to FIG. 10d, the power manager (233) is turned off when the current exceeds the set level for overcurrent protection in a predetermined number or more of the multiple input ports (PTI1 to PTIn) connected to the connector (CTab).

[0355] Meanwhile, the power manager (233) can vary the setting level for overcurrent protection in a number of ports (PTI1 to PTIn) less than a predetermined number among the plurality of input ports connected to the connector (CTab), if the level is higher than the setting level. Accordingly, it is possible to limit overcurrent protection due to foreign substances (OTa or OTb) attached to the display (180).

[0356] Figures 11a to 12b are drawings referenced in the description of Figures 10a to 10d.

[0357] Figure 11a illustrates an example of a variable setting level for overcurrent protection of the power manager (233).

[0358] Referring to the drawing, after the power of the video display device (100) is turned on, if a current lower than the first level (LV1), which is a set level for overcurrent protection, is detected in some of the multiple input ports of the power manager (233), the operation of the power manager (233) is in a stable state, and thus the power manager (233) can remain on and operate.

[0359] That is, when the power is turned on at the Ta point, the power manager (233) can remain on and operate.

[0360] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), the current detected in some ports of the power manager (233) may be higher than the first level (LV1), which is the set level.

[0361] Accordingly, an overcurrent protection operation is executed in the power manager (233), and the power manager (233) is turned off.

[0362] At this time, the signal processing device (170) or the timing controller (232) can control the setting level to increase in order to continue displaying images, etc., when the level of current detected in some ports of the power manager (233) is below the allowable value (Lmt).

[0363] That is, the signal processing device (170) or the timing controller (232) can output an enable signal when the level of current detected in some port of the power manager (233) is less than the allowable value (Lmt).

[0364] The power manager (233) is turned on again based on the enable signal and can increase the setting level for overcurrent protection from the first level (LV1) to the second level (LV2).

[0365] In particular, the power manager (233) can increase the setting level for overcurrent protection from the first level (LV1) to the second level (LV2) at time Tb, as shown in the drawing.

[0366] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the second level (LV2), which is the set level, the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0367] Meanwhile, if a crack occurs in the panel (210) and the level of current detected in some ports of the power manager (233) is higher than the allowable value (Lmt), the signal processing device (170) or the timing controller (232) does not output an enable signal.

[0368] Accordingly, the power manager (233) continues to be turned off, and eventually the panel (210) also continues to be turned off.

[0369] Figure 11b illustrates another example of variation in the setting level for overcurrent protection of the power manager (233).

[0370] Referring to the drawing, when power is turned on at time T1, the power manager (233) can be turned on and operate.

[0371] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), the current detected in some ports of the power manager (233) may be higher than the first level (LV1), which is the set level.

[0372] Accordingly, an overcurrent protection operation is executed in the power manager (233), and the power manager (233) is turned off.

[0373] Meanwhile, the signal processing device (170) or the timing controller (232) can output an enable signal when the level of current detected in some ports of the power manager (233) is equal to or higher than the first level (LV1), which is a set level, and less than the allowable value (Lmt).

[0374] The power manager (233) can be turned on again based on the enable signal and increase the setting level for overcurrent protection from the first level (LV1) to the second level (LV2).

[0375] In particular, the power manager (233) can increase the setting level for overcurrent protection from the first level (LV1) to the second level (LV2) at time T2, as shown in the drawing.

[0376] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the second level (LV2), which is the set level, the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0377] Meanwhile, foreign substances (OTa or OTb) may be attached to some of the input ports of the second circuit board (SPa, SPb), so that the level of current detected in some ports of the power manager (233) may be higher than the set level, the second level (LV2), and lower than the allowable value (Lmt).

[0378] Accordingly, an overcurrent protection operation is executed in the power manager (233), and the power manager (233) is turned off.

[0379] Meanwhile, the signal processing device (170) or the timing controller (232) can output an enable signal when the level of current detected in some ports of the power manager (233) is higher than the second level (LV2), which is a set level, and lower than the allowable value (Lmt).

[0380] The power manager (233) can be turned on again based on the enable signal and increase the setting level for overcurrent protection from the second level (LV2) to the third level (LV3).

[0381] In particular, the power manager (233) can increase the setting level for overcurrent protection from the second level (LV2) to the third level (LV3) at time T3, as shown in the drawing.

[0382] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the third level (LV3), which is the set level, the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0383] Meanwhile, foreign substances (OTa or OTb) may be attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) may be higher than the set level, the third level (LV3), and lower than the allowable value (Lmt).

[0384] Accordingly, an overcurrent protection operation is executed in the power manager (233), and the power manager (233) is turned off.

[0385] Meanwhile, the signal processing device (170) or the timing controller (232) can output an enable signal when the level of current detected in some ports of the power manager (233) is higher than the third level (LV3), which is a set level, and lower than the allowable value (Lmt).

[0386] The power manager (233) can be turned on again based on the enable signal and increase the setting level for overcurrent protection from the third level (LV3) to the fourth level (LV4).

[0387] In particular, the power manager (233) can increase the setting level for overcurrent protection from the third level (LV3) to the fourth level (LV4) at time T4, as shown in the drawing.

[0388] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, which is the fourth level (LV4), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0389] Meanwhile, foreign substances (OTa or OTb) may be attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) may be higher than the set level, the fourth level (LV4), and lower than the allowable value (Lmt).

[0390] Accordingly, an overcurrent protection operation is executed in the power manager (233), and the power manager (233) is turned off.

[0391] Meanwhile, the signal processing device (170) or the timing controller (232) can output an enable signal when the level of current detected in some ports of the power manager (233) is higher than the fourth level (LV4), which is a set level, and lower than the allowable value (Lmt).

[0392] The power manager (233) can be turned on again based on the enable signal and increase the setting level for overcurrent protection from the fourth level (LV4) to the fifth level (LV5).

[0393] In particular, the power manager (233) can increase the setting level for overcurrent protection from the fourth level (LV4) to the fifth level (LV5) at time T5, as shown in the drawing.

[0394] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, which is the fifth level (LV5), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0395] Meanwhile, if a crack occurs in the panel (210) and the level of current detected in some ports of the power manager (233) is higher than the allowable value (Lmt), the signal processing device (170) or the timing controller (232) does not output an enable signal.

[0396] Accordingly, the power manager (233) continues to be turned off, and eventually the panel (210) also continues to be turned off.

[0397] Figure 11c illustrates another example of variation of the setting level for overcurrent protection of the power manager (233).

[0398] Referring to the drawing, when power is turned on at time Tm, the power manager (233) can be turned on and operate.

[0399] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), the current detected in some ports of the power manager (233) may be lower than the first level (LV1), which is the set level.

[0400] Meanwhile, the signal processing device (170) or the timing controller (232) can control the current level detected in some ports of the power manager (233) to be lowered to a set level when the current level is lower than the first level (LV1), which is a set level.

[0401] For example, the power manager (233) can reduce the setting level for overcurrent protection from the first level (LV1) to the sixth level (LVa) at time Tn, as shown in the drawing.

[0402] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, which is the sixth level (LVa), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0403] Meanwhile, the signal processing device (170) or the timing controller (232) can control the current level detected in some ports of the power manager (233) to be lowered to a set level when the current level is lower than the sixth level (LVa), which is a set level.

[0404] For example, the power manager (233) can reduce the setting level for overcurrent protection from the sixth level (LVa) to the seventh level (LVb) at the To point, as shown in the drawing.

[0405] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, which is the seventh level (LVb), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0406] Meanwhile, the signal processing device (170) or the timing controller (232) can control the current level detected in some ports of the power manager (233) to be lowered to a set level when the current level is lower than the seventh level (LVb), which is a set level.

[0407] For example, the power manager (233) can reduce the setting level for overcurrent protection from the seventh level (LVb) to the eighth level (LVc) at time Tp, as shown in the drawing.

[0408] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, the eighth level (LVc), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0409] Meanwhile, the signal processing device (170) or the timing controller (232) can control the current level detected in some ports of the power manager (233) to be lowered to a set level when it is lower than the eighth level (LVc), which is a set level.

[0410] For example, the power manager (233) can reduce the setting level for overcurrent protection from the 8th level (LVc) to the 9th level (LVd) at time Tq, as shown in the drawing.

[0411] Meanwhile, if a foreign substance (OTa or OTb) is attached to some of the input ports of the second circuit board (SPa, SPb), and the level of current detected in some ports of the power manager (233) is lower than the set level, which is the ninth level (LVd), the power manager (233) continues to operate, and ultimately, an image can be displayed stably.

[0412] Figure 12a illustrates an example of the port-specific setting level of the power manager (233).

[0413] Referring to the drawing, (a) of FIG. 12a illustrates a setting level for overcurrent protection of a port of a power manager (233) corresponding to an input port to which a foreign substance (OTa) of the 11th input port (PTI11b) and the 12th input port (PTI12b) of FIG. 7a is not attached.

[0414] As shown in the drawing, the signal processing device (170) or the timing controller (232) can control the power manager (233) to maintain the set level for overcurrent protection of other ports (PT1 to PT10, PT13 to PT20) except for the 11th port (PT11) and the 12th port (PT12).

[0415] That is, the signal processing device (170) or the timing controller (232) can control the setting level for overcurrent protection of ports (PT1 to PT10, PT13 to PT20) other than the 11th port (PT11) and the 12th port (PT12) among the multiple ports (PT1 to PT20) of the power manager (233) to be maintained at the first level (LV1).

[0416] (b) of Fig. 12a illustrates a setting level for overcurrent protection of a port of a power manager (233) corresponding to an input port to which a foreign substance (OTa) is attached, of the 11th input port (PTI11b) and the 12th input port (PTI12b) of Fig. 7a.

[0417] As shown in the drawing, the signal processing device (170) or the timing controller (232) can increase the setting level for overcurrent protection of the 11th port (PT11) and the 12th port (PT12) among the multiple ports (PT1 to PT20) of the power manager (233) from the first level (LV1) to the second level (LV2) at the time Tb2.

[0418] Accordingly, it is possible to limit overcurrent protection due to foreign substances (OTa or OTb) attached to the display (180).

[0419] Figure 12b illustrates another example of the port-specific setting level of the power manager (233).

[0420] Referring to the drawing, (a) of FIG. 12a illustrates an example of a setting level for overcurrent protection of a port (PT11) of a power manager (233) corresponding to an 11th input port (PTI11b) to which a foreign substance (OTa) of FIG. 7a is attached.

[0421] As shown in the drawing, the signal processing device (170) or the timing controller (232) can increase the setting level for overcurrent protection of the 11th port (PT11) among the multiple ports (PT1 to PT20) of the power manager (233) from the first level (LV1) to the second level (LV2) at time Tc2.

[0422] Referring to the drawing, (b) of FIG. 12a illustrates an example of a setting level for overcurrent protection of a port (PT12) of a power manager (233) corresponding to the 12th input port (PTI12b) to which a foreign substance (OTa) of FIG. 7a is attached.

[0423] As shown in the drawing, the signal processing device (170) or the timing controller (232) can increase the setting level for overcurrent protection of the 12th port (PT12) among the multiple ports (PT1 to PT20) of the power manager (233) from the first level (LV1) to the third level (LV3) at time Tc2.

[0424] That is, the signal processing device (170) or the timing controller (232) can vary the setting level for overcurrent protection according to the level of the detected current, even if a foreign substance (OTa or OTb) is attached to multiple input ports.

[0425] For example, if the current flowing in the 12th port (PT12) is greater than the current flowing in the 11th port (PT11), the signal processing device (170) or the timing controller (232) can control the setting level for overcurrent protection of the 12th port (PT12) to be greater than the setting level for overcurrent protection of the 11th port (PT11). Accordingly, when a foreign substance is attached, an image can be displayed stably.

[0426] Meanwhile, the signal processing device (170) or the timing controller (232) can set the setting level for overcurrent protection of the 11th to 20th ports (PT11 to PT20) corresponding to the clock port among each port (PT1 to PT20) of the power manager (233) to be different from the setting level of the other ports.

[0427] For example, the signal processing device (170) or the timing controller (232) may set the setting level for overcurrent protection of the 11th to 20th ports (PT11 to PT20) corresponding to the clock port among each port (PT1 to PT20) of the power manager (233) to be lower than the setting level of the other ports.

[0428] Accordingly, overcurrent protection of the 11th to 20th ports (PT11 to PT20) corresponding to the clock port can be stably performed.

[0429] Meanwhile, the operations of the signal processing device (170), timing controller (232), power manager (233), etc. in FIGS. 6a to 12b can be applied as is to an organic light-emitting panel (210b) or an inorganic light-emitting panel in addition to a liquid crystal display panel (210).

[0430] Below, the description will focus on the display (180) having an organic light-emitting panel.

[0431] Figure 13 is another example of an internal block diagram of the display of Figure 2.

[0432] Referring to the drawing, a display (180b) based on an organic light-emitting panel may include an organic light-emitting panel (210b), a first interface unit (230b), a second interface unit (231b), a timing controller (232b), a gate driver unit (234b), a data driver unit (236b), a memory (240b), a processor (270b), a current detector unit (510b), etc.

[0433] Meanwhile, a display (180b) based on an organic light-emitting panel may further include a power manager (233b).

[0434] The display (180b) receives a video signal (Vdb), a first DC voltage (V1b), and a second DC voltage (V2b), and can display a predetermined image based on the video signal (Vdb).

[0435] Meanwhile, the first interface unit (230b) within the display (180b) can receive a video signal (Vdb) and a first DC voltage (V1b) from the signal processing device (170b).

[0436] Here, the first DC voltage (V1b) can be used for the operation of the power manager (233b) and the timing controller (232b) within the display (180b).

[0437] Next, the second interface unit (231b) can receive a second DC voltage (V2b) from an external power supply unit (190b). Meanwhile, the second DC voltage (V2b) can be input to a data driving unit (236b) within the display (180b).

[0438] The timing controller (232b) can output a gate control signal and a data control signal based on the image signal (Vdb).

[0439] Meanwhile, the power manager (233b) can boost the voltage of the gate control signal and data control signal from the timing controller (232b) and output the boosted gate control signal and the boosted data control signal.

[0440] The boosted gate control signal at this time can correspond to the gate drive signal (Sgab), and the boosted data control signal can correspond to the data drive signal (Sdab).

[0441] For example, when the first interface unit (230b) converts the input image signal (Vdb) and outputs the converted image signal (va1b), the timing controller (232b) or the power manager (233b) can output the data driving signal (Sdab) and the gate driving signal (Sgab) based on the converted image signal (va1b).

[0442] The timing controller (timing controllerb) (232b) can receive, in addition to the video signal (Vdb) from the signal processing device (170b), a control signal, a vertical synchronization signal (Vsyncb), etc.

[0443] In addition, the timing controller (232b) or power manager (233b) can output a gate drive signal (Sgab) for operation of the gate drive unit (234b) and a data drive signal (Sdab) for operation of the data drive unit (236b) based on a control signal, a vertical synchronization signal (Vsyncb), etc., in addition to the video signal (Vdb).

[0444] The data driving signal (Sdab) at this time may be a data driving signal for driving RGBW subpixels when the panel (210b) has RGBW subpixels.

[0445] Meanwhile, the timing controller (232b) or power manager (233b) can further output a control signal (Csb) to the gate driver (234b).

[0446] The gate driving unit (234b) and the data driving unit (236b) supply a scan signal and an image signal to the organic light-emitting panel (210b) through the gate line (GLb) and the data line (DLb), respectively, in accordance with the gate driving signal (Sgab) and the data driving signal (Sdab) from the timing controller (232b) or the power manager (233b). Accordingly, the organic light-emitting panel (210b) displays a predetermined image.

[0447] Meanwhile, the organic light-emitting panel (210b) may include an organic light-emitting layer, and in order to display an image, a plurality of gate lines (GLb) and data lines (DLb) may be arranged in a matrix form to cross each pixel corresponding to the organic light-emitting layer.

[0448] Meanwhile, the data driving unit (236b) can output a data signal to the organic light-emitting panel (210b) based on the second DC voltage (V2b) from the second interface unit (231b).

[0449] The power manager (233b) can supply various power sources to the gate driver (234b), data driver (236b), timing controller (232b), etc.

[0450] The current detection unit (510b) can detect the current flowing in the subpixel of the organic light-emitting panel (210b). The detected current can be input to a processor (270b) or the like for cumulative current calculation.

[0451] The processor (270b) can perform various controls within the display (180b). For example, it can control the gate driver (234b), the data driver (236b), the timing controller (232b), etc.

[0452] Meanwhile, the processor (270b) can receive information on current flowing in the subpixel of the organic light-emitting panel (210b) from the current detection unit (510b).

[0453] Figures 14a and 14b are drawings for reference in the description of the organic light-emitting panel of Figure 13.

[0454] First, FIG. 14a is a drawing showing pixels within an organic light-emitting panel (210b).

[0455] Referring to the drawing, the organic light-emitting panel (210b) may have a plurality of scan lines (Scan 1 to Scan n) and a plurality of data lines (R1, G1, B1, W1 to Rm, Gm, Bm, Wm) intersecting therewith.

[0456] Meanwhile, a pixel (subpixel) is defined in the intersection area of ​​the scan line and the data line within the organic light-emitting panel (210b). In the drawing, a pixel having RGBW subpixels (SR1, SG1, SB1, SW1) is illustrated.

[0457] FIG. 14b illustrates the circuit of one subpixel within the pixel of the organic light-emitting panel of FIG. 14a.

[0458] Referring to the drawing, the organic light-emitting sub-pixel circuit (CRTm) may be an active type and include a scan switching element (SW1), a storage capacitor (Cst), a driving switching element (SW2), and an organic light-emitting layer (OLED).

[0459] The scan switching element (SW1) is turned on according to an input scan signal (Vdscan) by connecting a scan line to the gate terminal. When turned on, the input data signal (Vdata) is transmitted to the gate terminal of the driving switching element (SW2) or one end of the storage capacitor (Cst).

[0460] The storage capacitor (Cst) is formed between the gate terminal and the source terminal of the driving switching element (SW2), and stores a predetermined difference between the data signal level transmitted to one end of the storage capacitor (Cst) and the DC voltage (Vdd) level transmitted to the other end of the storage capacitor (Cst).

[0461] For example, if the data signal has different levels according to the PAM (Plus Amplitude Modulation) method, the power level stored in the storage capacitor (Cst) changes depending on the level difference of the data signal (Vdata).

[0462] As another example, when the data signal has different pulse widths according to the Pulse Width Modulation (PWM) method, the power level stored in the storage capacitor (Cst) changes depending on the difference in the pulse width of the data signal (Vdata).

[0463] The driving switching element (SW2) is turned on according to the power level stored in the storage capacitor (Cst). When the driving switching element (SW2) is turned on, a driving current (IOLED) proportional to the stored power level flows to the organic light-emitting layer (OLED). Accordingly, the organic light-emitting layer (OLED) performs a light-emitting operation.

[0464] The organic light-emitting layer (OLED) includes an RGBW emission layer (EML) corresponding to a subpixel, and may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron transport layer (ETL), and an electron injection layer (EIL), and may also include a hole blocking layer.

[0465] Meanwhile, subpixels all emit white light from the organic light-emitting diode (OLED), but separate color filters are provided for green, red, and blue subpixels to implement the colors. That is, green, red, and blue subpixels each additionally have green, red, and blue color filters. On the other hand, white subpixels emit white light, so separate color filters are not required.

[0466] Meanwhile, in the drawing, a case in which a p-type MOSFET is used as the scan switching element (SW1) and the driving switching element (SW2) is exemplified, but an n-type MOSFET, or other switching elements such as a JFET, IGBT, or SIC may also be used.

[0467] Meanwhile, a pixel is a hold-type element that continues to emit light in an organic light-emitting layer (OLED) after a scan signal is applied during a unit display period, specifically, during a unit frame.

[0468] Although the preferred embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the specific embodiments described above, and various modifications may be made by a person skilled in the art to which the present invention pertains without departing from the gist of the present disclosure as claimed in the claims, and such modifications should not be understood individually from the technical idea or prospect of the present disclosure.

Claims

1. Panel; A first circuit board including a signal processing unit and a power manager; A second circuit board having a connector for connection with the power manager within the first circuit board and a plurality of input ports connected to the connector, and outputting a driving voltage to the panel; A cable connected between the plurality of ports of the power manager and the connector; The above power manager, A video display device that changes the setting level for overcurrent protection of some of the plurality of ports when foreign substances are attached to some of the plurality of input ports connected to the connector.

2. In paragraph 1, The above power manager, A video display device in which, when the foreign substance is attached to some of the plurality of input ports connected to the connector, the setting level for the overcurrent protection of some of the plurality of ports is increased from the first level to the second level.

3. In paragraph 1, The above power manager, A video display device that sequentially increases the setting level for overcurrent protection of some of the plurality of ports when the foreign substance is attached to some of the plurality of input ports connected to the connector.

4. In paragraph 1, The above power manager, When the foreign substance is attached to some of the plurality of input ports connected to the connector, the setting level for the overcurrent protection of the port corresponding to some of the plurality of input ports among the plurality of ports is varied, A video display device that maintains the setting level for overcurrent protection of a port that does not correspond to some of the plurality of input ports among the plurality of ports.

5. In paragraph 1, The above power manager, A display device that turns off when a crack occurs in the above panel.

6. In paragraph 1, The above power manager, Detecting the current output from at least some of the above plurality of ports, and if the detected current is equal to or greater than the first level and less than the allowable value, turning off, and after turning off, turning on again, A display device that increases the setting level for the overcurrent protection from the first level to the second level after the above is turned on again.

7. In paragraph 6, The above power manager, After increasing the above setting level to the second level, the current output from at least some of the plurality of ports is detected, and if the detected current is higher than the second level and lower than the allowable value, it is turned off, and after the turning off, it is turned on again. A display device that increases the setting level for the overcurrent protection from the second level to the third level after the above is turned on again.

8. In paragraph 6, The above power manager, An image display device that detects a current output from at least some of the plurality of ports after increasing the setting level to the second level, and maintains the setting level at the second level when the detected current is less than the second level.

9. In paragraph 7, The above power manager, After increasing the above setting level to the third level, the current output from at least some of the plurality of ports is detected, and if the detected current is higher than the third level and lower than the allowable value, it is turned off, and after the turning off, it is turned on again. A display device that increases the setting level for the overcurrent protection from the third level to the fourth level after the above is turned on again.

10. In paragraph 7, The above power manager, An image display device that detects a current output from at least some of the plurality of ports after increasing the setting level to the third level, and maintains the setting level at the third level when the detected current is less than the third level.

11. In paragraph 6, The above power manager, A display device that detects current output from at least some of the above-described plurality of ports and turns off when the detected current is greater than the allowable value.

12. In paragraph 6, The above power manager, An image display device that detects a current output from at least some of the plurality of ports, and turns off when the detected current is equal to or higher than the first level, which is a set level, and less than the allowable value, and transmits a conversion signal from a high level to a low level to the signal processing device through a fault port when turned off.

13. In paragraph 1, The above power manager, If the number of ports of the plurality of input ports connected to the connector is greater than or equal to the set level for the overcurrent protection, it is turned off. A video display device in which, among the plurality of input ports connected to the connector, a number of ports less than a predetermined number is set to a level higher than the set level for overcurrent protection.

14. Panel; A first circuit board including a signal processing unit and a power manager; A second circuit board having a connector for connection with the power manager within the first circuit board and a plurality of input ports connected to the connector, and outputting a driving voltage to the panel; A cable connected between the plurality of ports of the power manager and the connector; The above power manager, Detecting the current output from at least some of the above plurality of ports, and if the detected current is equal to or greater than the first level and less than the allowable value, turning off, and after turning off, turning on again, A display device that changes the setting level for overcurrent protection of some of the plurality of ports from the first level to the second level after the above is turned on again.

15. In paragraph 14, The above power manager, After increasing the above setting level to the second level, the current output from at least some of the plurality of ports is detected, and if the detected current is higher than the second level and lower than the allowable value, it is turned off, and after the turning off, it is turned on again. A display device that increases the setting level for the overcurrent protection from the second level to the third level after the above is turned on again.

16. In paragraph 14, The above power manager, An image display device that detects a current output from at least some of the plurality of ports after increasing the setting level to the second level, and maintains the setting level at the second level when the detected current is less than the second level.

17. In paragraph 15, The above power manager, After increasing the above setting level to the third level, the current output from at least some of the plurality of ports is detected, and if the detected current is higher than the third level and lower than the allowable value, it is turned off, and after the turning off, it is turned on again. A display device that increases the setting level for the overcurrent protection from the third level to the fourth level after the above is turned on again.

18. In paragraph 15, The above power manager, An image display device that detects a current output from at least some of the plurality of ports after increasing the setting level to the third level, and maintains the setting level at the third level when the detected current is less than the third level.

19. In paragraph 14, The above power manager, A display device that detects current output from at least some of the above-described plurality of ports and turns off when the detected current is greater than the allowable value.

20. Panel; A first circuit board including a signal processing unit and a power manager; A second circuit board having a connector for connection with the power manager within the first circuit board and a plurality of input ports connected to the connector, and outputting a driving voltage to the panel; A cable connected between the plurality of ports of the power manager and the connector; The above power manager, When the foreign substance is attached to some of the plurality of input ports connected to the connector, the setting level for overcurrent protection of a port corresponding to some of the plurality of input ports among the plurality of ports is varied. A video display device that maintains the setting level for overcurrent protection of a port that does not correspond to some of the input ports among the plurality of ports.

Images