Radio transmission device and radio display system

Abstract

A radio transmission device according to an embodiment of the present disclosure may comprise: a radio frequency (RF) transmission interface for performing radio communication with a radio reception device; and a processor for determining a radio connection state between the radio transmission device and the radio reception device, and transmitting, to the radio reception device via the RF transmission interface, an afterimage compensation execution command for an afterimage compensation operation of a display when the radio connection state is determined to be a normal connection state and a display usage time of the radio reception device exceeds a preset time.

Description

Wireless transmission device and wireless display system

[0001] The present disclosure relates to a wireless display system that wirelessly transmits and receives A / V data.

[0002] Digital TV services utilizing wired or wireless networks are becoming more widespread. Digital TV services can offer a variety of services not available with existing analog broadcasting services.

[0003] For example, IPTV (Internet Protocol Television), a type of digital TV service, and smart TV services offer interactivity, allowing users to actively choose the type of program they want to watch and when. Building on this interactivity, IPTV and smart TV services can also offer a variety of additional services, such as internet search, home shopping, and online games.

[0004] Recently, TV services have been provided through wireless systems in which a wireless transmission device transmits a compressed A / V (Audio / Video) signal to a wireless receiving device via a wireless connection, and the wireless receiving device restores the compressed A / V signal and outputs it.

[0005] If the display of the wireless receiver is composed of an organic light emitting diode (OLED) panel, the wireless receiver performs an afterimage compensation algorithm function to prevent afterimages on the OLED panel.

[0006] For wireless display systems, unlike general OLED display devices, it consists of a wireless receiving device including an OLED panel and a wireless transmitting device responsible for video processing.

[0007] In order for the afterimage compensation algorithm function to operate normally, commands for afterimage compensation operation must be accurately transmitted between the wireless receiving device and the wireless transmitting device so that the afterimage compensation algorithm, such as the pixel refresher, can be executed.

[0008] However, if the wireless environment is temporarily unstable, a problem may occur in which the afterimage compensation algorithm execution command or afterimage compensation algorithm completion confirmation command transmitted by the wireless transmitting device to the wireless receiving device is omitted, resulting in the afterimage compensation algorithm not being completed normally.

[0009] If the afterimage compensation operation of the OLED display of the wireless receiver is not performed properly, the lifespan of the OLED display may be shortened.

[0010] An object of the present disclosure may be to enable a residual image compensation operation of a wireless receiving device to be smoothly performed even when a wireless connection is temporarily unstable in a wireless display system.

[0011] An object of the present disclosure may be to enable a wireless transmitting device to accurately transmit a command for executing an afterimage compensation operation to a wireless receiving device even when the wireless connection is temporarily unstable in a wireless display system.

[0012] An object of the present disclosure may be to improve an afterimage compensation operation error that occurs when a wireless connection is temporarily unstable while a wireless receiving device is performing an afterimage compensation operation.

[0013] A wireless transmission device according to an embodiment of the present disclosure may include an RF (Radio Frequency) transmission interface for wirelessly communicating with a wireless reception device, and a processor for determining a wireless connection state between the wireless transmission device and the wireless reception device, and transmitting an afterimage compensation execution command for an afterimage compensation operation of the display to the wireless reception device through the RF transmission interface when the wireless connection state is determined to be a normal connection state and the usage time of the display of the wireless reception device is longer than a preset time.

[0014] In a wireless display system including a wireless transmission device and a wireless reception device according to an embodiment of the present disclosure, the wireless transmission device determines a wireless connection state between the wireless transmission device and the wireless reception device, and if the wireless connection state is determined to be a normal connection state and the usage time of the display of the wireless reception device is longer than a preset time, transmits a residual image compensation execution command for a residual image compensation operation of the display to the wireless reception device, and the wireless reception device can transmit a residual image compensation start notification to the wireless transmission device in response to the residual image compensation execution command.

[0015] According to an embodiment of the present disclosure, the performance of the afterimage prevention operation can be secured even in a state where the temporary wireless environment of the wireless display system is unstable and the transmission of commands is not smooth.

[0016] According to an embodiment of the present disclosure, before performing a residual image compensation operation, the wireless connection status between a wireless transmission device (100) and a wireless reception device (200) can be confirmed in advance, and a residual image compensation execution command can be transmitted to the wireless reception device (200) only when the wireless connection status is in a normal connection state. Accordingly, even if the wireless connection status becomes temporarily unstable, transmission of the residual image compensation execution command can be prevented from being missed.

[0017] According to an embodiment of the present disclosure, during the execution of the afterimage compensation operation, the wireless connection status between the wireless transmission device (100) and the wireless reception device (200) can be confirmed in advance, and only when the wireless connection status is a normal connection status can a confirmation command for completion of afterimage compensation be transmitted to the wireless reception device (200). Accordingly, even if the wireless connection status becomes temporarily unstable, the transmission of the afterimage compensation confirmation command may not be missed. In addition, the redundant execution of the afterimage compensation operation that may occur due to the missed transmission of the afterimage compensation confirmation command can be prevented.

[0018] FIGS. 1 and 2 are drawings explaining the configuration of a display system according to one embodiment of the present disclosure.

[0019] FIG. 3 is a block diagram illustrating the configuration of a remote control device according to one embodiment of the present disclosure.

[0020] Figure 4a is a perspective view of a wireless transmission device.

[0021] Figure 4b is a drawing explaining the internal structure of a wireless transmission device.

[0022] Figure 4c is a drawing illustrating an RF receiving interface of a wireless receiving device.

[0023] FIGS. 5A to 5C are drawings explaining a process in which an error in the afterimage compensation operation occurs when the wireless connection between a wireless transmitting device and a wireless receiving device is in an unstable state according to the prior art.

[0024] FIG. 6A is a sequence diagram illustrating an operation method of a wireless display system according to an embodiment of the present disclosure.

[0025] FIG. 6b is a drawing illustrating an example of displaying a residual image compensation completion pop-up window according to one embodiment of the present disclosure.

[0026] FIGS. 7A and 7B are drawings illustrating a method for determining whether the embodiment of FIG. 6A has been applied.

[0027] A wireless transmission device according to an embodiment of the present disclosure is, for example, an intelligent device that adds a computer-assisted function to a broadcast reception function, and while remaining faithful to the broadcast reception function, it can be provided with an Internet function, etc., and can have a more convenient interface such as a manual input device, a touch screen, or a space remote control.

[0028] Wireless transmission devices can connect to the Internet and computers with wired or wireless Internet capabilities, enabling functions such as email, web browsing, banking, and gaming. A standardized, general-purpose operating system can be used for these diverse functions.

[0029] Accordingly, the wireless transmission device described in the present disclosure can perform various user-friendly functions, for example, since various applications can be freely added or deleted on a general-purpose OS kernel.

[0030] FIGS. 1 and 2 are drawings illustrating the configuration of a wireless display system according to an embodiment of the present disclosure.

[0031] Referring to FIG. 1, a wireless display system (1) according to one embodiment of the present disclosure may include a wireless transmission device (100) and a wireless reception device (200).

[0032] A wireless display system (1) may be a system in which a wireless transmission device (100) wirelessly transmits A / V data to a wireless reception device (200), and the wireless reception device (200) outputs A / V data.

[0033] The wireless transmission device (100) may be a device capable of encoding video and audio and wirelessly transmitting the encoded content video and audio.

[0034] The wireless transmission device (100) may be a set-top box.

[0035] The wireless transmission device (100) can be connected to an external device such as a set-top box or a USB memory. The wireless transmission device (100) can transmit a video signal or audio signal received from the connected external device to the wireless reception device (200).

[0036] The wireless receiving device (200) may be a display device capable of wirelessly receiving encoded video and audio and decoding the received video and audio.

[0037] A wireless transmission device (100) and a wireless reception device (200) can constitute a video wall display system.

[0038] In video walls, display bezels with thin bezels play a crucial role in visualizing video content. To achieve this, it's efficient to have only the bare minimum components, with circuits or components for key functions housed in separate devices.

[0039] The wireless transmission device (100) can determine the compression rate of the video based on either the type of video input from the outside or the quality of communication between the wireless transmission device (100) and the wireless reception device (200).

[0040] The compression ratio of a video can be defined as the ratio of the size of the video data before encoding to the size of the video data after encoding.

[0041] The type of video can be any of the following: still video type, general video type, or game video type.

[0042] The wireless transmission device (100) can compress video according to a determined compression ratio and wirelessly transmit the compressed video to the wireless reception device (200).

[0043] The wireless receiving device (200) can restore compressed video received from the wireless transmitting device (100) and display the restored video on a display.

[0044] Figure 2 is a block diagram illustrating the detailed configuration of a wireless transmission device (100) and a wireless reception device (200).

[0045] Referring to FIG. 2, a wireless transmission device (100) may include a microphone (110), a wireless communication interface (120), a wired communication interface (130), a memory (140), a compression chip (150), an RF transmission interface (160), and a processor (190).

[0046] The microphone (110) can receive an audio signal and transmit it to the processor (190).

[0047] The microphone (110) can receive the voice spoken by the user.

[0048] The wireless communication interface (120) may include one or more of a Wi-Fi circuit and a Bluetooth circuit.

[0049] The Wi-Fi circuit can perform wireless communication with an external device or wireless receiving device (200) through the Wi-Fi standard.

[0050] The Bluetooth circuit can perform wireless communication through the Bluetooth Low Energy (BLE) standard.

[0051] The Bluetooth circuit can perform wireless communication with an external device such as a remote control or a wireless receiving device (200) through the Bluetooth Low Energy (BLE) standard.

[0052] The wireless communication interface (120) may also have a tuner for receiving broadcast signals.

[0053] The wired communication interface (130) may be an interface for wired connection with an external device. The wired communication interface (130) may include a plurality of HDMI (High Definition Multimedia Interface) terminals or USB (Universal Serial Bus) ports.

[0054] The wired communication interface (130) can receive a video signal or audio signal from an external device.

[0055] The memory (140) stores a program for signal processing and control, and can store signal-processed video, voice, or data signals.

[0056] The memory (140) may perform a function for temporary storage of video, voice, or data signals input from the outside, and may also store information about a specific image through a channel memory function.

[0057] The compression chip (150) can compress a video signal or audio signal input from the outside and transmit the compressed signal to the RF transmission interface (160).

[0058] The compression chip (150) may have an encoder for compressing a video signal or an audio signal.

[0059] The RF transmission interface (160) can transmit an A / V signal to the RF reception interface (240) of the wireless reception device (200) via RF (Radio Frequency) communication.

[0060] The RF transmission interface (160) may include one or more transmission antennas.

[0061] The RF transmission interface (160) can transmit a compressed A / V signal in digital form to the RF reception interface (240).

[0062] The RF transmission interface (160) can transmit A / V signals to the RF reception interface (240) through one or more channels.

[0063] The processor (190) can control the overall operation of the wireless transmission device (100). The processor (190) may be referred to as a main system on chip (Main SoC).

[0064] The processor (190) may also include a compression chip (150).

[0065] The wireless receiving device (200) may include a wireless communication interface (210), a wired communication interface (220), an RF receiving interface (240), a memory (250), a display (260), a speaker (270), a recovery chip (280), and a microcomputer (290).

[0066] The wireless communication interface (210) may include a Wi-Fi circuit, a Bluetooth circuit, and an IR circuit.

[0067] A Wi-Fi circuit can perform wireless communication through the Wi-Fi standard.

[0068] The Wi-Fi circuit can perform wireless communication with an external device or wireless transmission device (100) through the Wi-Fi standard.

[0069] The Bluetooth circuit can perform wireless communication through the Bluetooth Low Energy (BLE) standard.

[0070] The Bluetooth circuit can perform wireless communication with an external device such as a remote control or a wireless transmission device (100) through the Bluetooth Low Energy (BLE) standard.

[0071] The IR circuit can receive a signal from a remote control (300) to be described later via IR (Infrared) communication.

[0072] The wired communication interface (220) may be an interface for wired connection with an external device. The wired communication interface (220) may include a plurality of HDMI (High Definition Multimedia Interface) terminals or USB (Universal Serial Bus) ports.

[0073] The wired communication interface (220) can receive a video signal or audio signal from an external device.

[0074] The RF receiving interface (240) can receive a compressed A / V signal from the RF transmitting interface (160).

[0075] The RF receiving interface (240) may include one or more receiving antennas. The RF receiving interface (240) may be positioned at the bottom of the display (260).

[0076] The RF receiving interface (240) can receive a compressed A / V signal in digital form from the RF transmitting interface (160) and transmit the received A / V signal to the restoration chip (280).

[0077] The memory (250) stores a program for signal processing and control, and can store signal-processed video, voice, or data signals.

[0078] The display (260) can display a video signal received from the microcomputer (290).

[0079] The display (260) can display a video signal according to the operation of a timing controller (not shown).

[0080] The restoration chip (280) can restore the compressed A / V signal received by the RF receiving interface (240). The restoration chip (280) can include a decoder and can restore the compressed A / V signal through the decoder.

[0081] A microcomputer (microcomputer, 290) can control the overall operation of the wireless receiving device (200).

[0082] The microcomputer (290) can output a restored video signal through a display (260) and output a restored audio signal through a speaker (270).

[0083] FIG. 3 is a block diagram illustrating the configuration of a remote control device according to one embodiment of the present disclosure.

[0084] Referring to FIG. 3, the remote control device (300) may include a wireless communication interface (310), a user input interface (330), a memory (350), and a controller (390).

[0085] The wireless communication interface (310) may be an interface for performing wireless communication with a wireless transmission device (100) or a wireless reception device (200).

[0086] The wireless communication interface (310) may include a Bluetooth Low Energy (BLE) circuit (311) and an IR (InfraRed) circuit (313).

[0087] The BLE circuit (311) can transmit a signal to the wireless transmission device (100) to control the operation of the wireless transmission device (100).

[0088] The BLE circuit (311) can transmit a signal to the wireless transmission device (100) that triggers a pairing operation of the wireless transmission device (100).

[0089] The IR circuit (313) can transmit an IR signal to the wireless transmission device (100) for controlling the operation of the wireless transmission device (100) or the wireless reception device (200).

[0090] The user input interface (330) may be composed of a keypad, buttons, a touch pad, or a touch screen.

[0091] The user input interface (330) can generate control commands to control the operation of the wireless transmission device (100) or the wireless reception device (200) according to the user's operation commands.

[0092] When a hard key button is provided in the user input interface (330), the user can operate the hard key by pushing the hard key button.

[0093] The user input interface (330) may be equipped with various types of input means that can be operated by the user, such as a scroll key or a jog key.

[0094] The memory (350) can store a program for the operation of the controller (390) and can also temporarily store input / output data.

[0095] The controller (390) controls the operations associated with the application and, typically, the overall operation of the remote control device (300).

[0096] Fig. 4a is a perspective view of a wireless transmission device, Fig. 4b is a drawing explaining the internal structure of the wireless transmission device, and Fig. 4c is a drawing explaining the RF reception interface of the wireless reception device.

[0097] Referring to FIG. 4a, the wireless transmission device (100) may include a box (410), a sliding button receiving portion (401) for receiving a sliding button (401a), a dial (403), a power status indicator (405), and a communication quality status indicator (407).

[0098] The interior of the box (410) may contain components of the wireless transmission device (100) described in FIG. 2. The box (410) may be a housing capable of accommodating components of the wireless transmission device (100) described in FIG. 2.

[0099] The sliding button (401a) may be a means for controlling the vertical direction (tilting control) of the RF transmission interface (160) illustrated in FIG. 4b.

[0100] The dial (403) may be a means for controlling the horizontal rotation direction (panning control) of the RF transmission interface (160) illustrated in FIG. 4b.

[0101] The power status indicator (405) can indicate the power on or off status of the wireless transmission device (100). The power status indicator (405) can have one or more LEDs.

[0102] The communication quality status indicator (407) can indicate the communication quality status between the wireless transmission device (100) and the wireless reception device (200). The communication quality status indicator (407) can have one or more LEDs.

[0103] The communication quality status indicator (407) may not be provided in the box (410) as an optional configuration.

[0104] The processor (190) can receive pointing correction input through a sliding button (401a) or a dial (403).

[0105] The processor (190) can tilt the RF transmission interface (160) including the transmission antennas up and down according to an input that moves the sliding button (401a).

[0106] The RF transmission interface (160) may include a substrate and a plurality of transmission antennas. The RF transmission interface (160) may be provided on top of a heat sink (611) that discharges heat generated inside the box (410).

[0107] The processor (190) can rotate or pan the RF transmission interface (160) including the transmission antennas left and right in response to an input that moves the dial (403).

[0108] The user can perform antenna pointing correction by operating the sliding button (401a) or dial (403).

[0109] Referring to FIG. 4c, an RF receiving interface (240) may be provided at the bottom of the display (260) of the wireless receiving device (200).

[0110] The RF receiving interface (240) includes a substrate and a plurality of receiving antennas mounted on the substrate, and can receive A / V data from a wireless transmission device (100).

[0111] The RF receiving interface (240) may be positioned at the center bottom of the display (260). The RF receiving interface (240) may be positioned within a separate housing, and the housing may be positioned at the center bottom of the display (260).

[0112] The RF receiving interface (240) may include a front antenna array (241), an upper antenna array (242) positioned above the front antenna array (241), a lower antenna array (243) positioned below the front antenna array (241), a right antenna array (244) positioned on the right side of the front antenna array (241), and a left antenna array (245) positioned on the left side of the front antenna array (241).

[0113] In one embodiment, each of the front antenna array (241), the upper antenna array (242), the lower antenna array (243), the right antenna array (244), and the left antenna array (245) may include multiple receiving antennas.

[0114] In one embodiment, the receiving antennas included in each of the front antenna array (241), the upper antenna array (242), the lower antenna array (243), the right antenna array (244), and the left antenna array (245) may all be arranged to face the same direction.

[0115] In another embodiment, the front antenna array (241), the upper antenna array (242), the lower antenna array (243), the right antenna array (244), and the left antenna array (245) may each be arranged to face different directions.

[0116] FIGS. 5A to 5C are drawings explaining a process in which an error in the afterimage compensation operation occurs when the wireless connection between a wireless transmitting device and a wireless receiving device is in an unstable state according to the prior art.

[0117] FIG. 5a is a diagram illustrating a sequence in which a wireless display system performs an afterimage compensation operation according to a prior art.

[0118] The wireless display system performs afterimage compensation operation according to the following sequence.

[0119] Referring to FIG. 5a, the wireless transmission device (100) transmits a screen off command to the wireless reception device (200) (S501).

[0120] When the usage time of the display (260) of the wireless receiving device (200) is longer than a certain period of time, the wireless transmitting device (100) transmits a residual image compensation execution command to the wireless receiving device (200) for executing the residual image compensation operation (S503).

[0121] The wireless receiving device (200) performs a residual image compensation operation according to the received residual image compensation execution command.

[0122] The wireless receiving device (200) transmits a residual image compensation start notification to the wireless transmitting device (100) to notify the execution of the residual image compensation operation in response to the residual image compensation execution command (S505).

[0123] After a preset time has elapsed, the wireless transmission device (100) transmits a residual image compensation completion confirmation command to the wireless reception device (200) to inquire whether the residual image compensation operation has been completed (S507).

[0124] When the afterimage compensation operation is completed, the wireless receiving device (200) transmits a afterimage compensation completion notification indicating that the afterimage compensation operation is completed to the wireless transmitting device (100) in response to a afterimage compensation completion confirmation command (S509).

[0125] Figure 5a illustrates a typical sequence in which a wireless display system performs an afterimage compensation operation. However, if there is an obstacle between the wireless transmission device (100) and the wireless reception device (200) or the wireless environment is otherwise poor, a problem may arise in which the command transmitted from the wireless transmission device (100) to the wireless reception device (200) or the notification transmitted from the wireless reception device (200) to the wireless transmission device (100) is not accurately transmitted.

[0126] FIG. 5b is a diagram illustrating cases in which the wireless connection may be unstable in the sequence of FIG. 5a.

[0127] CASE 1 may be a case where the wireless connection between the wireless transmission device (100) and the wireless reception device (200) temporarily becomes unstable before the wireless transmission device (100) transmits a residual image compensation execution command to the wireless reception device (200).

[0128] CASE 2 may be a case where the wireless connection between the wireless transmission device (100) and the wireless reception device (200) temporarily becomes unstable during the afterimage compensation operation.

[0129] CASE 3 may be a case where, after the wireless transmission device (100) transmits a command to confirm the completion of afterimage compensation to the wireless reception device (200), the wireless connection between the wireless transmission device (100) and the wireless reception device (200) temporarily becomes unstable.

[0130] First, we explain the problem that occurs in the situation of CASE 1.

[0131] Referring to FIG. 5b, when the usage time of the display (260) of the wireless receiving device (200) is longer than a certain period of time, the wireless transmitting device (100) must transmit a residual image compensation execution command to the wireless receiving device (200) for performing the residual image compensation operation.

[0132] However, before the wireless transmission device (100) transmits the afterimage compensation execution command, the wireless connection between the wireless transmission device (100) and the wireless reception device (200) may temporarily become unstable (CASE 1). In this case, even if the wireless transmission device (100) transmits the afterimage compensation execution command, the wireless reception device (200) cannot receive the afterimage compensation execution command.

[0133] Since the wireless receiving device (200) has not received a command to execute the afterimage compensation, it does not perform the afterimage compensation operation. Accordingly, the wireless transmitting device (100) can transmit a control command to the wireless receiving device (200) so that, when the display (260) of the wireless receiving device (200) is turned on, an afterimage compensation failure notification (510) such as that shown in FIG. 5c is displayed.

[0134] Next, we explain the problem that occurs in the situation of CASE 2.

[0135] In CASE 2, the wireless receiving device (200) receives an afterimage compensation execution command from the wireless transmitting device (100) and normally performs the afterimage compensation operation. After a preset time has elapsed, the wireless transmitting device (100) transmits a afterimage compensation completion confirmation command to the wireless receiving device (200). However, since the wireless connection is unstable, the wireless receiving device (200) does not receive the afterimage compensation completion confirmation command and does not transmit an afterimage compensation completion notification to the wireless transmitting device (100).

[0136] Since the wireless transmission device (100) does not receive a notification of completion of afterimage compensation from the wireless reception device (200) after the preset time indicating the performance period of afterimage compensation has elapsed, the wireless transmission device (100) may transmit a command to the wireless reception device (200) to cause the afterimage compensation operation to be re-performed. An unnecessary operation of re-performing the afterimage compensation operation may occur even though the wireless reception device (200) has already performed the afterimage compensation operation. In addition, the wireless transmission device (100) may transmit a control command to the wireless reception device (200) so that a notification of afterimage compensation failure (510) such as that in FIG. 5c is displayed after the preset time indicating the performance period of afterimage compensation has elapsed.

[0137] Next, we explain the problem that occurs in the situation of CASE 3.

[0138] The wireless transmission device (100) transmits a command to confirm completion of afterimage compensation to the wireless reception device (200). The wireless reception device (200) outputs a notification of completion of afterimage compensation in response to the command to confirm completion of afterimage compensation. However, since the wireless connection is unstable, the notification of completion of afterimage compensation is not transmitted to the wireless transmission device (100).

[0139] Since the wireless transmission device (100) does not receive a notification of completion of afterimage compensation from the wireless reception device (200), it is determined that the afterimage compensation operation is not completed.

[0140] The wireless transmission device (100) can transmit a control command to the wireless reception device (200) so that a residual image compensation failure notification (510) such as FIG. 5c is displayed.

[0141] In this way, according to the prior art, a problem occurs in which the afterimage compensation operation is not performed or the afterimage compensation operation is performed repeatedly as the wireless environment temporarily deteriorates.

[0142] The present disclosure provides a method for preventing errors in afterimage compensation operation from occurring even when the wireless environment is temporarily unstable.

[0143] FIG. 6A is a sequence diagram illustrating an operation method of a wireless display system according to an embodiment of the present disclosure.

[0144] Referring to FIG. 6a, the processor (190) of the wireless transmission device (100) can transmit a screen off command to the wireless reception device (200) (S601).

[0145] The processor (190) can receive a screen off signal from the remote control device (300) to turn off the display (260) of the wireless receiving device (200). The processor (190) can transmit a screen off command to the wireless receiving device (200) in response to the screen off signal.

[0146] The processor (190) can transmit a screen off command to the wireless receiving device (200) using either a Bluetooth circuit or an IR circuit provided in the wireless communication interface (120).

[0147] The microcomputer (290) of the wireless receiving device (200) can turn off the screen of the display (260) according to a screen-off command received from the wireless transmitting device (100).

[0148] The processor (190) of the wireless transmission device (100) can determine whether power is connected to the wireless reception device (200) (S603).

[0149] The processor (190) can detect the power connection status of the wireless receiving device (200). The processor (190) can request power connection status information of the wireless receiving device (200) from the wireless receiving device (200) through either a Bluetooth circuit or an IR circuit provided in the wireless communication interface (120). The processor (190) can receive power connection status information from the wireless receiving device (200) in response to the request.

[0150] The power connection status information may include information on whether the wireless receiver (200) is powered on and whether the display (260) is on / off.

[0151] When it is determined that the wireless receiving device (200) is powered on, the processor (190) of the wireless transmitting device (100) can determine whether the wireless connection with the wireless receiving device (200) is normal (S605).

[0152] The wireless connection state between the wireless transmission device (100) and the wireless reception device (200) may include a normal connection state and an unstable state.

[0153] A normal connection state may be a state in which wireless communication is performed normally between the RF transmission interface (160) of the wireless transmission device (100) and the RF reception interface (240) of the wireless reception device (200).

[0154] In one embodiment, the processor (190) may determine a wireless connection status by measuring a value of a communication quality index between an RF transmission interface (160) of a wireless transmission device (100) and an RF reception interface (240) of a wireless reception device (200). If the value of the communication quality index is equal to or greater than a preset value, the processor (190) may determine the wireless connection status as a normal connection status, and if the value of the communication quality index is less than the preset value, the processor (190) may determine the wireless connection status as an unstable status.

[0155] In another embodiment, the processor (190) may determine the wireless connection status as a normal connection status when the communication quality status between the RF transmission interface (160) of the wireless transmission device (100) and the RF reception interface (240) of the wireless reception device (200) is not a disconnected state.

[0156] Communication quality status can be classified into good, average, weak, and disconnected status depending on the communication quality indicator.

[0157] The communication quality indicator can be either the signal to noise ratio (SNR) or the received signal strength indicator (RSSI).

[0158] When the processor (190) of the wireless transmission device (100) is in a normal connection state with the wireless reception device (200), it can transmit a residual image compensation execution command to the wireless reception device (200) (S607).

[0159] The processor (190) is in a normal connection state with the wireless receiving device (200) and, when the usage time of the display (260) is longer than a preset time, can transmit a residual image compensation execution command for executing the residual image compensation operation to the wireless receiving device (200).

[0160] The processor (190) can count the usage time of the display (260). The processor (190) can obtain the time that the screen of the display (260) is on as the usage time of the display (260).

[0161] In one embodiment, the processor (190) can receive the usage time of the display (260) from the wireless receiving device (200).

[0162] In another embodiment, the processor (190) can obtain the usage time of the display (260) by counting the time until it transmits a screen-on command to the wireless receiving device (200) and then transmits a screen-off command to the wireless receiving device (200).

[0163] In one embodiment, the processor (190) may transmit a first residual image compensation execution command to the wireless receiver (200) to execute the first residual image compensation operation when the processor (190) is in a normal connection state with the wireless receiver (200) and the usage time of the display (260) is longer than a preset first time. The preset first time may be 4 hours, but this is merely an example.

[0164] The first afterimage compensation execution command may be a command to perform the first afterimage compensation operation using the first afterimage compensation algorithm. The first afterimage compensation algorithm may be a method of compensating for deviations in the threshold voltage (Vth) of a TFT (Thin Film Transistor) element by sensing an increase or decrease in the current flowing through the OLED element compared to the characteristics of the TFT element provided in the OLED panel of the display (260).

[0165] The first residual image compensation operation can be set to be performed during the first compensation time.

[0166] In another embodiment, the processor (190) may transmit a second afterimage compensation execution command to the wireless receiver (200) to execute a second afterimage compensation operation when the processor (190) is in a normal connection state with the wireless receiver (200) and the usage time of the display (260) is longer than a preset second time. The preset second time may be 2000 hours, but this is merely an example.

[0167] The second afterimage compensation execution command may be a command to perform a second afterimage compensation operation using a second afterimage compensation algorithm. The second afterimage compensation algorithm may be a method of removing brightness and color deviation by sensing deterioration deviation of OLED elements provided in the OLED panel of the display (260).

[0168] The second afterimage compensation operation can be set to be performed during the second compensation time.

[0169] The microcomputer (290) of the wireless receiver (200) can perform an afterimage compensation operation by turning on (or activating) the screen of the display (260) according to the afterimage compensation execution command.

[0170] The processor (190) can transmit a residual image compensation execution command to the RF reception interface (240) of the wireless reception device (200) through the RF transmission interface (160).

[0171] Meanwhile, if the wireless connection status with the wireless receiving device (200) is unstable, the processor (190) may not transmit a residual image compensation execution command to the wireless receiving device (200).

[0172] If the wireless connection with the wireless receiving device (200) is unstable, the processor (190) may wait for a certain period of time to prevent the transmission of the afterimage compensation execution command from being missed. After waiting for the certain period of time, the processor (190) may re-check the wireless connection with the wireless receiving device (200).

[0173] If the wireless connection status with the wireless receiving device (200) is converted to a normal connection status as a result of re-verification of the wireless connection status, the processor (190) can transmit a residual image compensation execution command to the wireless receiving device (200).

[0174] In this way, according to an embodiment of the present disclosure, before performing the afterimage compensation operation, the wireless connection status between the wireless transmission device (100) and the wireless reception device (200) can be confirmed in advance, and only when the wireless connection status is a normal connection status, a afterimage compensation execution command can be transmitted to the wireless reception device (200).

[0175] Accordingly, even if the wireless connection status becomes temporarily unstable, transmission of the afterimage compensation execution command can be prevented from being missed.

[0176] The processor (190) of the wireless transmission device (100) can receive a residual image compensation start notification in response to a residual image compensation execution command (S609).

[0177] The microcomputer (290) of the wireless receiving device (200) can perform a residual image compensation operation in response to a residual image compensation execution command and transmit a residual image compensation start notification to the wireless transmitting device (100) notifying that the residual image compensation operation of the display (260) has started.

[0178] The microcomputer (290) can transmit a notification of the start of afterimage compensation to the RF transmission interface (160) of the wireless transmission device (100) through the RF reception interface (240).

[0179] The processor (190) of the wireless transmission device (100) can count the execution time of the afterimage compensation operation upon receiving the afterimage compensation start notification. The processor (190) can count the execution time of the afterimage compensation operation from the time of receiving the afterimage compensation start notification.

[0180] The processor (190) of the wireless transmission device (100) can determine whether the wireless connection status with the wireless reception device (200) is a normal connection status (S611).

[0181] The processor (190) can determine whether the wireless connection status with the wireless receiving device (200) is normal during the afterimage compensation operation of the display (260).

[0182] In one embodiment, the processor (190) may re-check the wireless connection status before transmitting the residual image compensation completion confirmation command.

[0183] In another embodiment, the processor (190) may re-check the wireless connection status before transmitting the afterimage compensation completion confirmation command when the execution time of the afterimage compensation operation reaches the first compensation time or the second compensation time.

[0184] The memory (140) of the wireless transmission device (100) may store a first compensation time corresponding to a first residual image compensation algorithm and a second compensation time corresponding to a second residual image compensation algorithm. The processor (190) may determine whether the execution time of the residual image compensation operation reaches the first compensation time or the second compensation time stored in the memory (140).

[0185] When the processor (190) of the wireless transmission device (100) is in a normal connection state with the wireless reception device (200), it can transmit a command to confirm completion of residual image compensation to the wireless reception device (200) (S613).

[0186] When the wireless connection status with the wireless receiving device (200) is a normal connection status, the processor (190) can transmit a residual image compensation completion confirmation command to the wireless receiving device (200) to confirm whether the residual image compensation operation is completed.

[0187] The processor (190) can transmit a command to confirm completion of residual image compensation to the RF reception interface (240) of the wireless reception device (200) through the RF transmission interface (160).

[0188] If the wireless connection state with the wireless receiving device (200) is unstable, the processor (190) may not transmit a command to confirm completion of residual image compensation to the wireless receiving device (200).

[0189] If the wireless connection with the wireless receiving device (200) is unstable, the processor (190) may wait for a certain period of time to prevent the transmission of the afterimage compensation completion confirmation command from being missed. After waiting for a certain period of time, the processor (190) may re-check the wireless connection with the wireless receiving device (200).

[0190] If the wireless connection status with the wireless receiving device (200) is converted to a normal connection status as a result of re-confirmation of the wireless connection status, the processor (190) can transmit a command to confirm completion of residual image compensation to the wireless receiving device (200).

[0191] The processor (190) of the wireless transmission device (100) can receive the result of performing residual image compensation from the wireless reception device (200) in response to a command to confirm completion of residual image compensation (S617).

[0192] The result of performing the afterimage compensation may include one or more of whether the afterimage compensation operation of the display (260) is completed or the actual execution time at which the afterimage compensation operation of the display (260) is actually performed.

[0193] The wireless receiving device (200) can perform a residual image compensation operation according to a residual image compensation execution command, and can perform the residual image compensation operation normally even if the wireless connection state is unstable thereafter. The wireless receiving device (200) can store the result of performing the residual image compensation operation, and when the wireless connection state is converted to a normal connection state, the result of performing the residual image compensation operation can be transmitted to the wireless transmission device (100).

[0194] In this way, according to an embodiment of the present disclosure, during the performance of the residual image compensation operation, the wireless connection status between the wireless transmission device (100) and the wireless reception device (200) can be confirmed in advance, and only when the wireless connection status is a normal connection status, a residual image compensation completion confirmation command can be transmitted to the wireless reception device (200).

[0195] Accordingly, even if the wireless connection becomes temporarily unstable, the transmission of the afterimage compensation confirmation command can be prevented. Furthermore, the redundant execution of afterimage compensation operations, which could otherwise occur due to the missed transmission of the afterimage compensation confirmation command, can be prevented.

[0196] The processor (190) of the wireless transmission device (100) can receive a notification of completion of residual image compensation from the wireless reception device (200) (S617).

[0197] When the performance of the afterimage compensation operation is completed, the wireless receiving device (200) can transmit a afterimage compensation completion notification to the wireless transmitting device (100). If the afterimage compensation performance result includes information indicating that afterimage compensation is completed, step S619 may be omitted.

[0198] Upon receiving a notification of completion of afterimage compensation, the processor (190) may transmit a control command to the wireless receiving device (200) to cause the display (260) to display a pop-up window (610) indicating completion of afterimage compensation.

[0199] FIG. 6b is a drawing illustrating an example of displaying a residual image compensation completion pop-up window according to one embodiment of the present disclosure.

[0200] Referring to FIG. 6b, the wireless transmission device (100) may transmit a control command to the wireless reception device (200) to cause the display (260) to display a pop-up window (610) indicating completion of afterimage compensation upon receiving a notification indicating completion of afterimage compensation from the wireless reception device (200). The wireless reception device (200) may display the pop-up window (610) indicating completion of afterimage compensation on the display (260) according to the received control command.

[0201] Again, Figure 6a is described.

[0202] Upon receiving a notification of completion of afterimage compensation, the processor (190) may transmit a screen-off command to turn off the screen of the display (260) to the wireless receiving device (200). This is because the screen of the display (260) may be turned on for afterimage compensation operation.

[0203] FIGS. 7A and 7B are drawings illustrating a method for determining whether the embodiment of FIG. 6A has been applied.

[0204] In Fig. 7a, it is assumed that the usage time of the display (260) of the wireless receiving device (200) is in a state in which it has been used for a preset time or longer, and the screen of the display (260) is in an off state.

[0205] Additionally, it is assumed that the power state of the wireless transmission device (100) and the power state of the wireless reception device (200) are temporarily out of sync with each other. This indicates that the wireless connection state is temporarily unstable.

[0206] For example, the power of the wireless transmission device (100) may be temporarily turned off, and the power of the wireless reception device (200) may be turned on.

[0207] Afterwards, the user can turn on the wireless transmission device (100). This is a situation where the temporary unstable state is converted to a normal connection state.

[0208] When an embodiment of the present disclosure is applied, since the wireless connection state has become a normal connection state, the wireless transmission device (100) can transmit a residual image compensation execution command to the wireless reception device (200), and the number of executions (C) and execution time (T) of the residual image compensation operation (OFF RS or JB) can be counted and increased. This can be confirmed through the residual image compensation menu (700) including the number of executions and execution time of the residual image compensation operation, as illustrated in FIG. 7b.

[0209] 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.

Claims

1. In a wireless transmission device, A radio frequency (RF) transmitting interface for wirelessly communicating with a wireless receiving device; and A processor that determines a wireless connection status between the wireless transmission device and the wireless reception device, determines that the wireless connection status is a normal connection status, and transmits an afterimage compensation execution command for afterimage compensation operation of the display to the wireless reception device through the RF transmission interface when the usage time of the display of the wireless reception device is longer than a preset time. Wireless transmission device.

2. In paragraph 1, The above processor If the above wireless connection status is unstable, the afterimage compensation execution command is not transmitted to the wireless receiving device. Wireless transmission device.

3. In paragraph 1, The above processor Recheck the wireless connection status during the afterimage compensation operation of the above display, If the above wireless connection state is the above normal connection state, a command to check completion of afterimage compensation to inquire whether afterimage compensation operation of the above display has been completed is transmitted to the above wireless receiving device. Wireless transmission device.

4. In paragraph 3, The above processor If the wireless connection status is in the unstable state, the afterimage compensation completion confirmation command is not transmitted to the wireless receiving device. Wireless transmission device.

5. In paragraph 3, The above processor In response to the above afterimage compensation completion confirmation command, the afterimage compensation performance result is received from the wireless receiving device through the RF transmission interface, The above afterimage compensation performance results are Whether the afterimage compensation operation has been completed or at least one of the actual execution times at which the afterimage compensation operation of the display was actually performed. Wireless transmission device.

6. In paragraph 5, The above processor Receiving a residual image compensation completion notification from the wireless receiving device via the RF transmission interface indicating that the residual image compensation operation has been completed. Wireless transmission device.

7. In paragraph 6, The above processor Upon receiving the above afterimage compensation completion notification, a control command is transmitted to the wireless receiving device to cause the display to display an afterimage compensation completion pop-up window. Wireless transmission device.

8. In paragraph 3, The above processor If the execution time of the above afterimage compensation operation reaches the preset compensation time, the wireless connection status is re-checked. Wireless transmission device.

9. In a wireless display system including a wireless transmitting device and a wireless receiving device, The above wireless transmission device A wireless connection status between the wireless transmission device and the wireless reception device is determined, and if the wireless connection status is determined to be a normal connection status and the usage time of the display of the wireless reception device is longer than a preset time, an afterimage compensation execution command for afterimage compensation operation of the display is transmitted to the wireless reception device, The above wireless receiving device In response to the above-mentioned afterimage compensation execution command, a afterimage compensation start notification is transmitted to the above-mentioned wireless transmission device. Wireless display system.

10. In paragraph 9, The above wireless transmission device If the above wireless connection status is unstable, the afterimage compensation execution command is not transmitted to the wireless receiving device. Wireless display system.

11. In paragraph 9, The above wireless transmission device Recheck the wireless connection status during the afterimage compensation operation of the above display, If the above wireless connection state is the above normal connection state, a command to check completion of afterimage compensation to inquire whether afterimage compensation operation of the above display has been completed is transmitted to the above wireless receiving device. Wireless display system.

12. In paragraph 11, The above wireless transmission device If the wireless connection status is in the unstable state, the afterimage compensation completion confirmation command is not transmitted to the wireless receiving device. Wireless display system.

13. In paragraph 11, The above processor In response to the above afterimage compensation completion confirmation command, the afterimage compensation performance result is received from the wireless receiving device through the RF transmission interface, The above afterimage compensation performance results are Whether the afterimage compensation operation has been completed or at least one of the actual execution times at which the afterimage compensation operation of the display was actually performed. Wireless display system.

14. In paragraph 13, The above processor Receiving a residual image compensation completion notification from the wireless receiving device via the RF transmission interface indicating that the residual image compensation operation has been completed. Wireless display system.

15. In paragraph 14, The above processor Upon receiving the above afterimage compensation completion notification, a control command is transmitted to the wireless receiving device to cause the display to display an afterimage compensation completion pop-up window. Wireless display system.

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