Sink device and operation method thereof

Abstract

A sink device according to an embodiment of the present disclosure may comprise: a memory for storing extended display identification data (EDID); an external device interface for receiving an input signal from a source device via a high-definition multimedia interface (HDMI) standard; and a controller for acquiring a scanning rate of the input signal on the basis of the input signal, determining whether the acquired scanning rate is a first scanning rate, and if the acquired scanning rate is determined to be the first scanning rate, transmitting first EDID corresponding to the first scanning rate to the source device.

Description

Sync device and method of operation thereof

[0001] The present disclosure relates to a sink device, and more particularly, to a sink device that receives a signal from a source device via the HDMI standard.

[0002] HDMI (High-Definition Multimedia Interface) is an uncompressed digital video / audio interface standard. A sink device, such as a display device, receives video / audio signals from a source device via the HDMI standard.

[0003] Clear MR (Clear Motion Ratio) is a certification program run by the Video Electronics Standards Association (VESA) and is a standard for evaluating the blur level of video for products equipped with displays.

[0004] When connecting a source device that supports the HDMI 2.1 specification, separate user interface (UI) operations are required to experience the higher tier of ClearMR.

[0005] Additionally, there is an issue of objection to arbitrary UI manipulation during certification of Clear MR (Clear Motion Ratio).

[0006] Even when authenticating with ClearMR, authentication is performed through a separate operation, and users have the inconvenience of having to manually activate the function.

[0007] Additionally, the source device defaults to the EDID (Extended Display Identification Data) of the HDMI 1.4 specification, so if the user is unaware of this feature, they may not be able to experience the maximum resolution of the sink device and the high tier of ClearMR.

[0008] The purpose of this disclosure is to provide maximum resolution output settings and highest Tier ClearMR operation with just one setting without complex UI scenario linkage.

[0009] The purpose of this disclosure is to automatically set an EDID optimized for a source device by changing from an EDID that supports the maximum resolution to an EDID that supports lower resolutions.

[0010] A sink device according to an embodiment of the present disclosure may include a memory for storing extended display identification data (EDID), an external device interface for receiving an input signal from a source device through a High-Definition Multimedia Interface (HDMI) standard, and a controller for obtaining a refresh rate of the input signal based on the input signal, determining whether the obtained refresh rate is a first refresh rate, and transmitting a first EDID corresponding to the first refresh rate to the source device when the obtained refresh rate is determined to be the first refresh rate.

[0011] The above sink device can automatically change the EDID to be transmitted to the source device according to the injection rate of the input signal.

[0012] A method of operating a sink device according to an embodiment of the present disclosure may include the steps of receiving an input signal from a source device through a High-Definition Multimedia Interface (HDMI) standard, obtaining a refresh rate of the input signal based on the input signal, determining whether the obtained refresh rate is a first refresh rate, and transmitting first extended display identification data (EDID) corresponding to the first refresh rate to the source device when the obtained refresh rate is determined to be the first refresh rate.

[0013] According to an embodiment of the present disclosure, a sink device can automatically set an EDID optimized for a source device by changing from an EDID supporting the maximum resolution to an EDID supporting lower resolutions.

[0014] This allows users to experience the maximum resolution setting of their source device and the highest tier of ClearMR operation without any additional UI action.

[0015] Figure 1 is a block diagram illustrating the configuration of a display device according to one embodiment of the present invention.

[0016] FIG. 2 is a drawing illustrating the configuration of an HDMI system according to an embodiment of the present disclosure.

[0017] FIG. 3 is a flowchart illustrating an operation method of a sink device according to an embodiment of the present disclosure.

[0018] Fig. 4a is a drawing explaining EDID of a two-block structure, and Fig. 4b is a drawing explaining scan rate and supported resolution information included in EDID of a two-block structure.

[0019] FIG. 4c is a diagram illustrating an EDID having a 4-block structure according to one embodiment of the present disclosure, FIG. 4d is a diagram illustrating an EDID having a 4-block structure according to another embodiment of the present disclosure, and FIG. 4e is a diagram illustrating information on a refresh rate and supported resolution included in an EDID having a 4-block structure.

[0020] FIG. 5a is a diagram illustrating multiple tier levels for Clear MR, and FIG. 5b is a diagram illustrating tier levels for which various types of sink devices have been certified.

[0021] FIG. 6 is a drawing illustrating a UI for setting a mode supporting a refresh rate of 144 Hz according to an embodiment of the present disclosure.

[0022] FIG. 7a is a drawing explaining that an EDID to be provided to a source device changes depending on whether the booster mode is turned on or off according to one embodiment of the present disclosure, and FIG. 7b is a drawing explaining that an EDID to be provided to a source device is a 4-block structured EDID when the booster mode is set as a default according to another embodiment of the present disclosure.

[0023] Hereinafter, embodiments related to the present invention will be described in more detail with reference to the drawings. The suffixes "module" and "part" used in the following description for components are assigned or used interchangeably solely for the convenience of writing the specification, and do not in themselves have distinct meanings or roles.

[0024] A display device according to an embodiment of the present invention is, for example, an intelligent display device that adds computer-assisted functionality to its broadcast reception function. While faithfully performing the broadcast reception function, it can also be equipped with Internet functionality and other features, providing a more user-friendly interface, such as a manual input device, touch screen, or space remote control. Furthermore, with support for wired or wireless Internet functionality, it can connect to the Internet and a computer, enabling functions such as email, web browsing, banking, or gaming. A standardized, general-purpose operating system can be used for these various functions.

[0025] Accordingly, the display device described in the present invention can perform various user-friendly functions, for example, by allowing various applications to be freely added or deleted on a general-purpose operating system kernel. More specifically, the display device can be a network TV, HBB TV, smart TV, LED TV, OLED TV, etc., and in some cases, it can also be applied to smartphones.

[0026] FIG. 1 is a block diagram illustrating the configuration of a display device according to one embodiment of the present invention.

[0027] Referring to FIG. 1, the display device (100) may include a broadcast receiving unit (130), an external device interface (135), a memory (140), a user input interface (150), a controller (170), a wireless communication interface (173), a display (180), a speaker (185), and a power supply circuit (190).

[0028] The broadcast receiving unit (130) may include a tuner (131), a demodulator (132), and a network interface (133).

[0029] The tuner (131) can select a specific broadcast channel according to a channel selection command. The tuner (131) can receive a broadcast signal for the selected specific broadcast channel.

[0030] The demodulator (132) can separate the received broadcast signal into a video signal, an audio signal, and a data signal related to the broadcast program, and can restore the separated video signal, audio signal, and data signal into a form that can be output.

[0031] The external device interface (135) can receive an application or a list of applications within an adjacent external device and transmit it to the controller (170) or memory (140).

[0032] The external device interface (135) can provide a connection path between the display device (100) and the external device. The external device interface (135) can receive one or more of images and audio output from an external device connected wirelessly or wiredly to the display device (100) and transmit them to the controller (170). The external device interface (135) can include a plurality of external input terminals. The plurality of external input terminals can include an RGB terminal, one or more HDMI (High Definition Multimedia Interface) terminals, and a component terminal.

[0033] A video signal of an external device input through an external device interface (135) can be output through a display (180). A voice signal of an external device input through an external device interface (135) can be output through a speaker (185).

[0034] An external device that can be connected to the external device interface (135) may be any one of a set-top box, a Blu-ray player, a DVD player, a game console, a sound bar, a smartphone, a PC, a USB memory, and a home theater, but this is only an example.

[0035] The network interface (133) may provide an interface for connecting the display device (100) to a wired / wireless network including the Internet. The network interface (133) may transmit or receive data to or from other users or other electronic devices via the connected network or another network linked to the connected network.

[0036] Additionally, some content data stored in the display device (100) can be transmitted to a selected user or electronic device among other users or other electronic devices pre-registered in the display device (100).

[0037] The network interface (133) can access a predetermined web page through a connected network or another network linked to the connected network. That is, by accessing a predetermined web page through a network, data can be transmitted or received with the corresponding server.

[0038] In addition, the network interface (133) can receive content or data provided by a content provider or network operator. That is, the network interface (133) can receive content such as movies, advertisements, games, VOD, broadcast signals, etc. and information related thereto provided from a content provider or network provider via a network.

[0039] Additionally, the network interface (133) can receive firmware update information and update files provided by the network operator, and can transmit data to the Internet or content provider or network operator.

[0040] The network interface (133) can select and receive a desired application from among applications open to the public via a network.

[0041] The memory (140) stores a program for each signal processing and control within the controller (170), and can store signal-processed image, voice, or data signals.

[0042] In addition, the memory (140) may perform a function for temporary storage of video, audio, or data signals input from an external device interface (135) or a network interface (133), and may store information about a specific image through a channel memory function.

[0043] The memory (140) can store an application or a list of applications input from an external device interface (135) or a network interface (133).

[0044] The display device (100) can play content files (video files, still image files, music files, document files, application files, etc.) stored in the memory (140) and provide them to the user.

[0045] The user input interface (150) can transmit a signal input by the user to the controller (170) or transmit a signal from the controller (170) to the user. For example, the user input interface (150) can receive and process control signals such as power on / off, channel selection, and screen setting from a remote control device according to various communication methods such as Bluetooth, Ultra Wideband (WB), ZigBee, Radio Frequency (RF) communication, or infrared (IR) communication, or process control signals from the controller (170) to be transmitted to the remote control device.

[0046] In addition, the user input interface (150) can transmit control signals input from local keys (not shown) such as a power key, channel key, volume key, and setting value to the controller (170).

[0047] An image signal processed by the controller (170) can be input to the display (180) and displayed as an image corresponding to the image signal. In addition, an image signal processed by the controller (170) can be input to an external output device through an external device interface (135).

[0048] The voice signal processed by the controller (170) can be output as audio to the speaker (185). In addition, the voice signal processed by the controller (170) can be input to an external output device through the external device interface (135).

[0049] In addition, the controller (170) can control the overall operation within the display device (100).

[0050] In addition, the controller (170) can control the display device (100) by a user command or internal program input through the user input interface (150), and can connect to a network to enable the user to download a desired application or application list into the display device (100).

[0051] The controller (170) enables the user-selected channel information, etc. to be output through a display (180) or speaker (185) together with processed video or audio signals.

[0052] In addition, the controller (170) allows a video signal or audio signal from an external device, for example, a camera or camcorder, input through the external device interface (135) to be output through the display (180) or speaker (185) in accordance with an external device video playback command received through the user input interface (150).

[0053] Meanwhile, the controller (170) can control the display (180) to display an image, for example, a broadcast image input through a tuner (131), an external input image input through an external device interface (135), an image input through a network interface, or an image stored in a memory (140) can be controlled to be displayed on the display (180). In this case, the image displayed on the display (180) can be a still image or a moving image, and can be a 2D image or a 3D image.

[0054] In addition, the controller (170) can control the playback of content stored in the display device (100), received broadcast content, or external input content input from outside, and the content can be in various forms such as broadcast video, external input video, audio file, still image, connected web screen, and document file.

[0055] The wireless communication interface (173) can communicate with an external device through wired or wireless communication. The wireless communication interface (173) can perform short-range communication with the external device. To this end, the wireless communication interface (173) can support short-range communication using at least one of Bluetooth™, RFID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (Ultra Wideband), ZigBee, NFC (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technologies. This wireless communication interface (173) can support wireless communication between the display device (100) and a wireless communication system, between the display device (100) and another display device (100), or between the display device (100) and a network in which the display device (100, or an external server) is located via a short-range wireless communication network (Wireless Area Network). The short-range wireless communication network can be a short-range wireless personal area network (Wireless Personal Area Network).

[0056] Here, the other display device (100) may be a wearable device (e.g., a smartwatch, smart glasses, a head-mounted display (HMD)) or a mobile terminal such as a smart phone that can exchange data with (or be linked to) the display device (100) according to the present invention. The wireless communication interface (173) may detect (or recognize) a wearable device capable of communication around the display device (100).

[0057] Furthermore, if the detected wearable device is a device certified to communicate with the display device (100) according to the present invention, the controller (170) can transmit at least a portion of the data processed in the display device (100) to the wearable device via the wireless communication interface (173). Accordingly, a user of the wearable device can utilize the data processed in the display device (100) via the wearable device.

[0058] The display (180) can generate a driving signal by converting a video signal, data signal, OSD signal processed by the controller (170) or a video signal, data signal, etc. received from an external device interface (135) into R, G, and B signals, respectively.

[0059] Meanwhile, since the display device (100) illustrated in FIG. 1 is merely an embodiment of the present invention, some of the illustrated components may be integrated, added, or omitted depending on the specifications of the display device (100) actually implemented.

[0060] That is, two or more components may be combined into a single component, or a single component may be subdivided into two or more components, as needed. Furthermore, the functions performed by each block are intended to illustrate embodiments of the present invention, and their specific operations or devices do not limit the scope of the present invention.

[0061] According to another embodiment of the present invention, the display device (100) may receive and play back an image through a network interface (133) or an external device interface (135) without having a tuner (131) and a demodulator (132), unlike that shown in FIG. 1.

[0062] For example, the display device (100) may be implemented separately as an image processing device, such as a set-top box, for receiving broadcast signals or contents according to various network services, and a content playback device for playing contents input from the image processing device.

[0063] In this case, the operating method of the display device according to the embodiment of the present invention to be described below may be performed by any one of the display device (100) described with reference to FIG. 1, as well as an image processing device such as the separated set-top box, or a content playback device having a display (180) and a speaker (185).

[0064] FIG. 2 is a drawing illustrating the configuration of an HDMI system according to an embodiment of the present disclosure.

[0065] An HDMI system (2) may include a source device (10) and a sink device (20).

[0066] The source device (10) can transmit a signal to the sink device (20) through the HDMI (High Definition Multimedia Interface) standard. Specifically, the source device (10) can transmit an output signal to the sink device (20) under the FRL (Fixed Rate Link) mode through the HDMI 2.1 standard.

[0067] The sink device (20) can output a signal received from the source device (10).

[0068] The display device (100) of Fig. 1 is an example of a sink device (20). The sink device (20) may include all components of the display device (100).

[0069] The source device (10) can be connected to the sink device (20) via an HDMI cable.

[0070] The source device (10) may be an external device such as a set-top box, game console, laptop, or smartphone.

[0071] The sink device (20) may be an electronic device such as a display device (100), a smart pad, a smartphone, or a PC.

[0072] The source device (10) may be a device that supports the HDMI 2.1 standard. The source device (10) may be connected through the external device interface (135) of the sink device (20).

[0073] When the source device (10) is connected to the sink device (20) via HDMI, the source device (10) can supply 5V of power to the sink device (20) via a display data channel (DDC). When the 5V power received from the source device (10) is supplied to the EDID circuit of the sink device (20), the sink device (20) can switch the HPD (Hot Plug Detect) signal from low to high.

[0074] The sink device (20) can transmit a connection confirmation signal (high signal) to the source device (10) as the HPD signal changes from low to high.

[0075] When a high signal is received, the source device (10) can transmit a command to the sink device (20) through the DDC to request the EDID of the sink device (20).

[0076] The sink device (20) can transmit the EDID of the sink device (20) through the DDC according to the received command.

[0077] The source device (10) can output a video signal having a resolution, refresh rate, and color range that matches the EDID received from the sink device (20) to the sink device (20).

[0078] The sink device (20) can transmit a new EDID to the source device (10) instead of the existing EDID depending on the refresh rate supported by the source device (10).

[0079] FIG. 3 is a flowchart illustrating an operation method of a sink device according to an embodiment of the present disclosure.

[0080] The sink device (20) of FIG. 3 may include all components of the display device (100) illustrated in FIG. 1.

[0081] Referring to FIG. 3, the controller (170) of the sink device (20) receives an HDMI standard input signal from the source device (10) through the external device interface (135) (S301).

[0082] The source device (10) can be connected via an HDMI terminal provided in the external device interface (135) of the sink device (20). The source device (10) can output an input signal to the sink device (20) via an HDMI cable.

[0083] The input signal may include video frames output at regular time intervals from a source device (10).

[0084] The controller (170) of the sink device (20) can determine whether the source device (10) supports the first injection rate based on the received input signal (S303).

[0085] In one embodiment, the first injection rate may be 144 Hz, but this may be an exemplary figure.

[0086] The controller (170) can obtain a pixel clock frequency, horizontal total (H-total) pixels, vertical total (V-total) pixels, and three frame rates from the input signal. The controller (170) can check the output times of three consecutive video frames and calculate the frame rates for the three video frames.

[0087] The controller (170) can determine whether the source device (10) supports the first refresh rate based on the pixel clock frequency, horizontal total (H-total) pixels, vertical total (V-total) pixels, and three frame rates.

[0088] The controller (170) can calculate the pixel clock frequency using the following [Mathematical Formula 1].

[0089] [Mathematical Formula 1]

[0090] Pixel Clock Frequency = (H-total)*(V-total)*3 Frame Rate

[0091] The controller (170) can calculate the scan rate of the input signal by dividing the calculated pixel clock frequency by (H-total)*(V-total).

[0092] The controller (170) can determine whether the injection rate of the input signal is 144 Hz (first injection rate) using the following [Mathematical Formula 2].

[0093] [Equation 2]

[0094] Refresh rate = (pixel clock frequency) / ((H-total)*(V-total))

[0095] If the controller (170) of the sink device (20) determines that the source device (10) supports the first refresh rate, it can transmit first extended display identification data (EDID) including first information indicating that video output of the first refresh rate is possible to the source device (10) (S305).

[0096] EDID was developed by VESA and is data in a standardized format for a sink device (20) to transmit its information to a source device (10).

[0097] EDID may include information about the sink device (20), including the name, serial number, supported refresh rate, supported resolution, and audio format of the sink device (10).

[0098] The memory (140) of the sink device (20) may store multiple EDIDs. Each of the multiple EDIDs may contain different specification information. For example, each EDID may contain different supported refresh rates and supported resolutions.

[0099] The controller (170) can select an EDID that matches the scan rate of the signal output by the source device (10) among multiple EDIDs.

[0100] The controller (170) can set the EDID to be provided to the source device (10) among multiple EDIDs as the first EDID by default. To this end, the controller (170) can turn on the booster function to support a refresh rate of 144 Hz by default.

[0101] If the controller (170) determines that the source device (10) supports a refresh rate of 144 Hz based on the input signal, it can extract a first EDID including first information indicating that a video output of 144 Hz is possible among a plurality of EDIDs.

[0102] If the controller (170) determines that the source device (10) supports a refresh rate of 144 Hz based on the input signal, the controller (170) can maintain the EDID to be provided to the source device (10) as the first EDID.

[0103] The first information may include a refresh rate of 144 Hz and multiple resolutions that can be supported at the refresh rate of 144 Hz.

[0104] The first EDID may have a four-block structure. The four-block structure may include a base block, a block map, a Consumer Technology Association Ext (CTA) extension block, and a DPID (DisplayID Ext Block).

[0105] The existing EDID with a two-block structure was unable to define 144 Hz at 4K resolution. The first EDID with a four-block structure according to an embodiment of the present disclosure can define 144 Hz at 4K resolution.

[0106] Fig. 4a is a drawing explaining EDID of a two-block structure, and Fig. 4b is a drawing explaining scan rate and supported resolution information included in EDID of a two-block structure.

[0107] FIG. 4c is a diagram illustrating an EDID having a 4-block structure according to one embodiment of the present disclosure, FIG. 4d is a diagram illustrating an EDID having a 4-block structure according to another embodiment of the present disclosure, and FIG. 4e is a diagram illustrating information on a refresh rate and supported resolution included in an EDID having a 4-block structure.

[0108] Referring to FIG. 4a, the EDID (410) of the two-block structure may include a base block (411) and CTA Ext (413).

[0109] The EDID (410) of the two-block structure of Fig. 4a may be data transmitted from the sink device (20) to the source device (10) in the HDMI 1.4 standard.

[0110] The base block (411) may be named Block 0 and may include the manufacturer name of the sink device (20), the date of production, the size of the display, the range of color gamuts supported by the display, and the resolution supported by the display at a particular refresh rate.

[0111] The base block (411) may include information about the refresh rate and the resolution supported by the refresh rate, such as 4096x2160 at 100Hz, 3840x2160 at 100Hz, 4096x2160 at 120Hz, and 3840x2160 at 120Hz, as shown in FIG. 4b.

[0112] CTA Ext (413) may be named Block 1 and may be a block describing multiple functions supported by the sink device (10). The multiple functions may include deep color functions and audio-related functions.

[0113] Referring to FIG. 4c, the EDID (430) having a 4-block structure may include a base block (431), a block map (433), a CTA Ext block (435), and a DPID extension block (DisplayID Ext block, 437).

[0114] The base block (431) may include the manufacturer name of the sink device (20), the date of production, the size of the display, the range of color gamut supported by the display, and the resolution supported by the display at a specific refresh rate.

[0115] The block map (433) may be a block that defines that EDID will be used in a 4-block structure.

[0116] The CTA Ext block (435) may be a block that describes multiple functions supported by the sink device (10). The multiple functions may include deep color functions and audio-related functions.

[0117] The DPID extension block (437) may include information on the supported resolution of the injection rate that cannot be defined in the existing 2-block structure EDID (410).

[0118] Referring to Figure 4e, it shows the supported resolution information of 144 Hz.

[0119] That is, the resolution information that can be supported at 144Hz can include 3840x2160, 1920x1080 in 16:9, 2560x1080, 3840x1600 in 21:9, and 3840x1080 in 32:9.

[0120] The DPID extension block (437) may include first information including a refresh rate of 144 Hz and a plurality of resolutions that can be supported at the refresh rate of 144 Hz.

[0121] Referring to FIG. 4d, an EDID (450) having a four-block structure according to another embodiment of the present disclosure may include a base block (451), a first CTA Ext block (453), a second CTA Ext block (455), and a DPID (DisplayID Ext Block, 457).

[0122] The EDID in Fig. 4d may be of the EEODB (EDID Extension Override Data Block) type.

[0123] EDID with a 4-block structure can have either a block map type or an EEODB type.

[0124] The base block (451) may include the manufacturer name of the sink device (20), the date of production, the size of the display, the range of color gamut supported by the display, and the resolution supported by the display at a specific refresh rate.

[0125] The first CTA Ext block (453) may be a block that defines that EDID will be used in a four-block structure. The first CTA Ext block (453) may be a block that describes multiple functions supported by the sink device (10). The multiple functions may include deep color functions and audio-related functions.

[0126] The second CTA Ext block (455) is a reserved block and may be a block to which a desired resolution can be added.

[0127] The DPID extension block (457) may include information on the supported resolution of the injection rate that cannot be defined in the existing 2-block structure EDID (410).

[0128] The DPID extension block (457) may include first information including a refresh rate of 144 Hz and a plurality of resolutions that can be supported at the refresh rate of 144 Hz, as illustrated in FIG. 4e.

[0129] Again, Figure 3 is explained.

[0130] EDID (430 or 450) having a 4-block structure of the HDMI 2.1 standard may be set as default to be transmitted to the source device (10) when the sink device (20) is connected to the source device (10) via the HDMI standard.

[0131] The controller (170) of the sink device (20) can transmit an EDID (430 or 450) of a 4-block structure to the source device (10) according to the default setting when the source device (10) supports the first injection rate. That is, the controller (170) may not change the EDID to be provided to the source device (10) when the source device (10) supports the first injection rate.

[0132] The source device (10) can output a video signal having 144 Hz to the sink device (20) based on receiving an EDID (430 or 450) having a 4-block structure, and the sink device (20) can output the received video signal to the display (180).

[0133] If the controller (170) of the sink device (20) determines that the source device (10) does not support the first injection rate, it can determine whether the source device (10) supports a second injection rate that is lower than the first injection rate (S307).

[0134] In one embodiment, the second injection rate may be 120 Hz, but this is an example only.

[0135] The controller (170) can obtain pixel clock frequency, horizontal total (H-total) pixels, vertical total (V-total) pixels, and three frame rates from the input signal.

[0136] The controller (170) can check the output times of three consecutive video frames and calculate the frame rate for the three video frames.

[0137] The controller (170) can determine whether the source device (10) supports the first refresh rate based on the pixel clock frequency, horizontal total (H-total) pixels, vertical total (V-total) pixels, and three frame rates.

[0138] The controller (170) can calculate the second injection rate using [Mathematical Formula 1] and [Mathematical Formula 2] described in step S303.

[0139] If the controller (170) of the sink device (20) determines that the source device (10) supports a second refresh rate lower than the first refresh rate, the controller (170) can transmit second extended display identification data (EDID) including second information indicating that video output of the second refresh rate is possible to the source device (10) (S309).

[0140] The second information may include a refresh rate of 120 Hz and a plurality of resolutions supportable at the 120 Hz refresh rate, as illustrated in FIG. 4B. The second information may include a plurality of resolutions supportable at the 100 Hz refresh rate and a plurality of resolutions supportable at the 120 Hz refresh rate, as illustrated in FIG. 4.

[0141] The second information may include information indicating support for deep color functionality. Deep color functionality may be a feature that allows for smooth transitions and gradual, subtle changes in color tones between colors.

[0142] The second EDID may have a two-block structure as illustrated in FIG. 4a and may be data of the HDMI 2.1 standard.

[0143] If the controller (170) determines that it supports a second injection rate that is lower than the first injection rate, it can change the first EDID to the second EDID.

[0144] The controller (170) can transmit a second EDID to the source device (10) if it is determined that the source device (10) supports the second injection rate.

[0145] That is, the sink device (20) can automatically perform an EDID setting optimized for the source device (10) by quickly changing from an EDID setting with the maximum resolution to an EDID setting with a gradually lower resolution.

[0146] If the controller (170) of the sink device (20) determines that the source device (10) does not support the second injection rate, it can transmit the third EDID to the source device (10) (S311).

[0147] In one embodiment, the third EDID may be a two-block structured EDID having the HDMI 1.4 specification as illustrated in FIG. 4a.

[0148] If the controller (170) determines that the source device (10) does not support a refresh rate of 120 Hz, it can change the first EDID to the third EDID having a two-block structure with the HDMI 1.4 standard.

[0149] In this way, the controller (170) can transmit the third EDID having a two-block structure with the HDMI 1.4 standard to the source device (10) if the source device (10) does not support a refresh rate of 120 Hz.

[0150] That is, the controller (170) can transmit the third EDID to the source device (10) instead of the first EDID if the source device (10) does not support a refresh rate of 120 Hz.

[0151] In this way, according to an embodiment of the present disclosure, the sink device (20) can automatically set an EDID optimized for the source device (10) by changing from an EDID supporting the maximum resolution to an EDID supporting a lower resolution.

[0152] Accordingly, the user can experience the maximum resolution setting of the source device (10) and the highest tier Clear MR operation without any additional action through the UI.

[0153] FIG. 5a is a diagram illustrating multiple tier levels for Clear MR, and FIG. 5b is a diagram illustrating tier levels for which various types of sink devices have been certified.

[0154] Clear MR (Clear Motion Ratio) is a certification program run by the Video Electronics Standards Association (VESA) and is a standard for evaluating the blur level of video for products equipped with displays.

[0155] Tier ratings can be categorized into 11 levels ranging from 3000 to 13000, and the higher the tier rating, the clearer the video is considered to be.

[0156] For example, if the model number is <ag276qzd>If so, it can indicate that you have been certified with the highest tier rating of 13000.

[0157] According to the prior art, when a source device (10) of the HDMI 2.1 standard is connected to a sink device (20), separate UI manipulation is required to experience the high tier of Clear MR. In addition, objections may be raised regarding arbitrary UI manipulation during Clear MR certification.

[0158] According to an embodiment of the present disclosure, the sink device (20) is set by default to support a refresh rate of 144 Hz, so that a user can experience a high tier of Clear MR without a separate UI operation.

[0159] FIG. 6 is a drawing illustrating a UI for setting a mode supporting a refresh rate of 144 Hz according to an embodiment of the present disclosure.

[0160] A mode that supports a refresh rate of 144 Hz is called a booster mode (or 144 Hz-booster mode). The display device (100) can display a settings menu (600) including a booster item (610) for activating the booster mode that supports a refresh rate of 144 Hz. The settings menu (600) can be a menu for optimizing game images when the source device (10) connected to the sink device (20) is a game console.

[0161] Booster mode may be turned on by default. In another embodiment, the user may turn booster mode off via the booster item (610).

[0162] Meanwhile, upon receiving an input to turn on the boost mode, the display device (100) may display a pop-up window (630) inquiring about keeping the boost mode on, as illustrated in FIG. 6.

[0163] The display device (100) is set to have the booster mode turned on by default, and when the source device (10) supports a refresh rate of 144 Hz, it can transmit a first EDID including first information indicating that it supports a refresh rate of 144 Hz to the source device (10).

[0164] The source device (10) can output a 144 Hz video signal to the display device (100) based on the first EDID. The display device (100) can display a video corresponding to the 144 Hz video signal received from the source device (10) on the display (180).

[0165] Users can experience the maximum resolution output setting of the source device (10) and the highest tier Clear MR operation without any separate action.

[0166] FIG. 7a is a drawing explaining that an EDID to be provided to a source device changes depending on whether the booster mode is turned on or off according to one embodiment of the present disclosure, and FIG. 7b is a drawing explaining that an EDID to be provided to a source device is a 4-block structured EDID when the booster mode is set as a default according to another embodiment of the present disclosure.

[0167] In FIGS. 7a and 7b, the game mode may be a mode that provides picture quality and response speed optimized for games when the source device (10) connected to the sink device (20) is a game device.

[0168] The video output mode of the sink device (20) may include game mode, cinema mode, sports mode, and standard mode. In each mode, the values ​​of the picture quality elements may be set differently according to the type of content.

[0169] Referring to FIG. 7a, the sink device (20) can transmit an EDID having a two-block structure to the game device when the game mode is turned off. That is, when the game mode is turned off, the sink device (20) can transmit an EDID (410) having a two-block structure, such as FIG. 4a, to the source device (10) in response to an EDID request from the source device (10).

[0170] When the game mode is turned on, the sink device (20) can transmit a different type of EDID to the source device (10) depending on whether the booster item (610) of FIG. 6 is turned on / off.

[0171] The sink device (20) can transmit a two-block structured EDID (410) to the source device (10) when the game mode is turned on and the booster item (610) is turned off.

[0172] The sink device (20) can transmit a 4-block structured EDID (430 or 450) to the source device (10) when the game mode is turned on and the booster item (610) is turned on.

[0173] According to the embodiment of FIG. 7a, since the EDID (410) of the two-block structure can be transmitted to the source device (10) depending on the off state of the booster item (610), it is easy to respond to legacy issues of the source device (10). Accordingly, the possibility of compatibility issues occurring in the source device (10) can be reduced.

[0174] Referring to FIG. 7b, the sink device (20) can transmit an EDID having a two-block structure to the game device when the game mode is turned off. That is, when the game mode is turned off, the sink device (20) can transmit an EDID (410) having a two-block structure, such as FIG. 4a, to the source device (10) in response to an EDID request from the source device (10).

[0175] When the game mode is turned on, the sink device (20) can transmit EDID (430 or 450) with a 4-block structure by default to the source device (10).

[0176] According to the embodiment of Fig. 7b, there is an advantage of easy accessibility to a refresh rate of 144 Hz when the source device (10) supports a refresh rate of 144 Hz, since the user does not need to perform a separate UI operation.

[0177] According to one embodiment of the present disclosure, the above-described method can be implemented as processor-readable code on a medium in which a program is recorded. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices.

[0178] The display device described above is not limited to the configuration and method of the embodiments described above, and the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made.

Claims

1. In sink equipment, Memory that stores Extended Display Identification Data (EDID); An external device interface that receives input signals from a source device through the HDMI (High-Definition Multimedia Interface) standard; and A controller including a controller that obtains an injection rate of the input signal based on the input signal, determines whether the obtained injection rate is a first injection rate, and transmits a first EDID corresponding to the first injection rate to the source device when the obtained injection rate is determined to be the first injection rate. Sink device.

2. In paragraph 1, The above first information is Contains resolution information supported by the above first injection rate Sink device.

3. In paragraph 2, The above first EDID has a four-block structure including a base block, a block map, a CTA Ext block, and a DPID extension block (DisplayID Ext block). The above DPIP includes the resolution information supported by the first injection rate. Sink device.

4. In paragraph 2, The above first EDID has a four-block structure including a base block, a first CTA Ext block, a second CTA Ext block, and a DPID extension block (DisplayID Ext block). The above DPIP includes the resolution information supported by the first injection rate. Sink device.

5. In paragraph 3, The above controller If the source device is a game device and the video output mode of the sink device is a game mode, the first EDID is transmitted to the source device. Sink device.

6. In paragraph 3, If the source device is a game device and the video output mode of the sink device is a game mode, the EDID provided to the source device is set to the first EDID by default. Sink device.

7. In paragraph 3, The above controller If the source device is a game device and the video output mode of the sink device is a game mode, determine whether the booster mode supporting the first injection rate is turned on; If the booster mode is on, the first EDID is transmitted to the source device, When the booster mode is turned off, the EDID with a two-block structure including the base block and the CTA Ext block is transmitted to the source device. Sink device.

8. In paragraph 1, The above controller Calculate the refresh rate of the input signal based on the pixel clock frequency of the input signal, the horizontal total pixels, the vertical total pixels, and the frame rate for three frames. Sink device.

9. In paragraph 8, The above controller The pixel clock frequency is calculated using the following [Mathematical Formula 1], [Mathematical Formula 1] Pixel Clock Frequency = (H-total)*(V-total)*3 Frame Rate Calculate the injection rate of the input signal using the following [Mathematical Formula 2] [Equation 2] Refresh rate = (pixel clock frequency) / ((H-total)*(V-total)) Sink device.

10. In paragraph 1, The above controller If the injection rate of the input signal does not support the first injection rate, it is determined whether the second injection rate, which is smaller than the first injection rate, is supported; If the injection rate of the input signal supports the second injection rate, a second EDID including resolution information corresponding to the second injection rate is transmitted to the source device. Sink device.

11. In paragraph 10, If the injection rate of the input signal does not support the second injection rate, the third EDID is transmitted to the source device. Sink device.

12. In paragraph 11, The above first EDID and the above second EDID follow the HDMI 2.1 standard, The above 3rd EDID follows the HDMI 1.4 specification. Sink device.

13. In paragraph 10, The first injection rate is 144 Hz, and the second injection rate is 120 Hz. Sink device.

14. In paragraph 1, The above controller Automatically changes the EDID to be transmitted to the source device according to the injection rate of the input signal. Sink device.

15. In the method of operating the sink device, A step of receiving an input signal from a source device through the HDMI (High-Definition Multimedia Interface) standard; A step of obtaining an injection rate of the input signal based on the input signal; A step of determining whether the obtained injection rate is the first injection rate; and If the acquired injection rate is determined to be the first injection rate, a step of transmitting first extended display identification data (EDID) corresponding to the first injection rate to the source device is included. How the sink device works.

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