KR20220111164A - Display device and operating method for the same - Google Patents

Abstract

Disclosed is a display device. According to an embodiment of the present invention, the display device can improve the watching environment by automatically sensing an error of a picture displayed in a changed requested resolution. The display device includes: an input/output unit receiving a first picture having a first resolution from a content providing device by requesting the first resolution to a content providing device; a display displaying a first picture; a memory storing one or more instructions; and a processor executing the one or more instructions stored in the memory. The processor changes the requested resolution to the content providing device from the first resolution to a second resolution and receives a second picture from the content providing device by corresponding to the change in the requested resolution. The processor also controls the display to show the received second picture and determines whether the error occurs in the second picture displayed. When the error occurs in the second picture, the processor changes the requested resolution from the second resolution to the first resolution.

Description

Display device and operating method for the same

Various embodiments relate to a display device and an operating method thereof, and more particularly, to a display device for displaying an image provided from a content providing device connected to the display device and an operating method thereof.

A display device is a device having a function of displaying an image that a user can watch. A user may watch a broadcast through the display device. The display device displays a broadcast selected by a user among broadcast signals transmitted from a broadcast station on a display. In addition, a smart television (TV) that provides various contents in addition to a broadcasting function is being provided. The smart TV does not operate passively according to the user's selection, but performs a function of analyzing and providing what the user wants without the user's manipulation.

On the other hand, when a content providing device such as a set-top box, a Blu-ray Disc player, a DVD (Digital Versatile Disk) player, a streaming device, a home theater, or an audio device is connected to a display device such as a TV, the display device is An image may be received from the content providing device and displayed.

The content providing apparatus may output the content to the display apparatus in consideration of the output resolution of the display apparatus. At this time, when the output resolution of the display device is changed, an error may occur in the image displayed on the display device, and the user must recognize the error and maintain the output resolution or perform restoration.

Various embodiments provide a display device that automatically analyzes whether an error has occurred in an image received from the content providing device and displayed when a request resolution of the display device requests to the content providing device connected to the display device is changed, and an operation thereof method can be provided.

In addition, when an error occurs in an image, a display device capable of notifying a user of an error occurrence or automatically restoring a requested resolution of the display device and an output resolution of the content providing device can be provided and an operating method thereof.

A display apparatus according to an embodiment includes an input/output unit for requesting a first resolution from a content providing apparatus and receiving a first image having the first resolution from the content providing apparatus, and a display for displaying the first image , a memory storing one or more instructions, and a processor executing the one or more instructions stored in the memory, wherein the processor changes a request resolution requested from the content providing device from the first resolution to a second resolution and receiving a second image from the content providing device in response to the requested resolution change, controlling the display to display the received second image, and determining whether an error occurs in the displayed second image , when an error occurs in the second image, the requested resolution may be changed from the second resolution to the first resolution.

The processor according to an embodiment may change the requested resolution based on a user input for switching to a wide screen mode.

According to an embodiment, the first aspect ratio of the first resolution and the second aspect ratio of the second resolution may be different from each other.

The processor according to an embodiment may determine whether an error has occurred in the second image by comparing the first image with the second image.

The processor according to an embodiment may determine that an error has occurred in the second image when the image data included in the first image is not included in the second image.

The processor according to an embodiment may be configured to compare a first aspect ratio of the first image with a second aspect ratio of a region corresponding to the first image among the second images, and compare the first aspect ratio with the second screen When the ratios do not match within a preset range, it may be determined that an error has occurred in the second image.

The input/output unit according to an embodiment may include a High Definition Multimedia Interface (HDMI), and the first image and the second image may be received from the content providing apparatus through the HDMI.

The processor according to an embodiment may control the input/output unit to transmit the requested resolution to the content providing device through EDID information.

When an error occurs in the second image, the processor according to an embodiment may control the display to display the image having the first resolution.

The processor according to an embodiment may, when an error occurs in the second image, control the display to output a message informing that an error occurs in the second image.

The method of operating a display apparatus according to an embodiment includes: requesting a first resolution from a content providing apparatus, receiving a first image having the first resolution from the content providing apparatus, and displaying the first image , changing the requested resolution requested by the content providing device from the first resolution to the second resolution, receiving a second image from the content providing device in response to the change in the requested resolution, the received second Displaying an image, determining whether an error occurs in the displayed second image, and changing the requested resolution from the second resolution to the first resolution when an error occurs in the second image may include.

The display device according to an embodiment may automatically detect whether an error has occurred in the image displayed at the changed requested resolution, so that even when an error that is difficult to recognize by the user occurs, the display device notifies the user of the error in the image or restores the requested resolution again. By doing so, it is possible to improve the user's viewing environment.

In particular, when the display device is connected to a content providing device that provides game content, and the content providing device supports a game-specific ratio such as 21:9 or 32:9 depending on the graphic card or game title, the display environment of the display device error can be prevented.

1 is a diagram illustrating a display system according to an exemplary embodiment.
2 is a flowchart illustrating a method of operating a display apparatus according to an exemplary embodiment.
3 is a flowchart illustrating an operation between a content providing apparatus and a display apparatus according to an exemplary embodiment.
4 and 5 are diagrams referenced to explain an operation of detecting whether an error occurs when a display device changes a requested resolution according to an exemplary embodiment.
6 and 7 are diagrams referenced to explain an operation of detecting whether an error occurs when a display device changes a requested resolution according to an exemplary embodiment.
8 is a diagram illustrating examples of outputting a notification message when an error occurs in an image displayed by a display apparatus according to an exemplary embodiment;
9 is a block diagram illustrating a configuration of a display apparatus according to an exemplary embodiment.
10 is a block diagram illustrating a configuration of a content providing apparatus according to an exemplary embodiment.
11 is a block diagram illustrating a configuration of a display apparatus according to another exemplary embodiment.

Terms used in this specification will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected as currently widely used general terms as possible while considering the functions in the present invention, but these may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. In addition, in a specific case, there is a term arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

In the entire specification, when a part "includes" a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated. In addition, terms such as "...unit" and "module" described in the specification mean a unit that processes at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software. .

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

In the embodiment of the present specification, the term “user” means a person who controls a system, function, or operation, and may include a developer, an administrator, or an installer.

1 is a diagram illustrating a display system according to an exemplary embodiment.

Referring to FIG. 1 , a display system may include a display apparatus 100 and a content providing apparatus 200 .

The display apparatus 100 according to an embodiment may be a TV, but this is only an embodiment and may be implemented in various forms including a display. For example, the display device 100 may include a mobile phone, a tablet PC, a digital camera, a camcorder, a laptop computer, a desktop, an e-book terminal, a digital broadcasting terminal, a personal digital assistant (PDA), or a portable multimedia player (PMP). , a navigation system, an MP3 player, a wearable device, and the like, may be implemented as various electronic devices. In particular, the embodiments may be easily implemented in a display device having a large display, such as a signage or a TV, but is not limited thereto. Also, the display apparatus 100 may be a fixed type or a mobile type, and may be a digital broadcasting receiver capable of receiving digital broadcasting.

The display apparatus 100 may be implemented not only as a flat display apparatus, but also as a curved display apparatus that is a screen having a curvature or a flexible display apparatus with an adjustable curvature. The output resolution of the display apparatus 100 may include, for example, a resolution higher than that of High Definition (HD), Full HD, Ultra HD, or Ultra HD.

The content providing device 200 is a device that provides content, and may reproduce content. For example, the content providing device 200 includes a set-top box, a Blu-ray Disc player, a Digital Versatile Disk (DVD) player, a game device, a digital camera, a camcorder, a streaming device, a home theater, an audio device, and the like. may include Alternatively, the content providing device 200 is a smart phone, a tablet PC, a mobile terminal, a video phone, an e-book reader (e-book reader), a desktop PC, a laptop PC, a netbook computer, PDA (Personal Digital Assistants), PMP (Portable) A multimedia player), a navigation device, an MP3 player, a wearable device, and the like may be various electronic devices.

Content according to an embodiment may mean multimedia content, and may include, but is not limited to, images, video, audio, text, games, applications, and the like.

Also, the content may be content recorded on an optical disc such as a DVD or Blu-ray disc. Alternatively, the content may be received from an external recording medium such as a USB memory or from an external server. However, the present invention is not limited thereto.

The display apparatus 100 and the content providing apparatus 200 according to an embodiment may be connected to each other through wired/wireless communication. For example, the display device 100 includes a content providing device 200 and a High-Definition Multimedia Interface (HDMI) port, a Mobile High-Definition Link (MHL) port, a Universal Serial Bus (USB) port, and a Display Port (DP) port. , Thunderbolt port, VGA (Video Graphics Array) port, RGB port, D-SUB (D-subminiature), DVI (Digital Visual Interface), component jack, PC port, etc. By being connected, it is possible to transmit or receive video, audio, and additional information.

Alternatively, the display apparatus 100 may be connected to the content providing apparatus 200 through short-range wireless communication such as wireless LAN or Bluetooth to transmit or receive video, audio, and additional information.

The display apparatus 100 connected to the content providing apparatus 200 may output the content transmitted from the content providing apparatus 200 . Accordingly, the content providing apparatus 200 according to an embodiment may be referred to as a playback device or source device, and the display apparatus 100 may be referred to as a sink device.

Meanwhile, the display apparatus 100 according to an embodiment may provide screens having various resolutions and aspect ratios. The display apparatus 100 according to an embodiment may provide screens having aspect ratios of 4:3, 16:9, 16:10, 21:9, and 32:9, and may have various resolutions according to the aspect ratio. screens can be provided. For example, in an aspect ratio of 16:9, it is possible to provide screens with resolutions of 1280 x 720, 1366 x 768, 1600 x 900, 1920 x 1080, 2560 x 1440, 3840 x 2160, 5120 x 2880, 7680 x 4320. In an aspect ratio of 21:9, screens having resolutions of 2560 x 1080, 3440 x 1440, and 5120 x 2160 may be provided. The display apparatus 100 may display a black screen on a partial area of the display to provide screens of various resolutions. However, the present invention is not limited thereto.

The content providing apparatus 200 according to an embodiment may change the resolution of an image output to the display apparatus 100 according to the requested resolution of the display apparatus 100 . For example, when the content providing apparatus 200 has a first resolution requested by the display apparatus 100 and the content providing apparatus 200 supports the first resolution, the content providing apparatus 200 is the display apparatus (100) may output an image having a first resolution, the requested resolution requested by the display device 200 is changed from the first resolution to the second resolution, and the content providing device 200 supports the second resolution In this case, the content providing apparatus 200 may output an image having the second resolution to the display apparatus 100 . At this time, an error may occur in the second image having the changed resolution displayed on the display apparatus 100, and the display apparatus 100 compares and analyzes the first image and the second image to determine whether an error has occurred in the second image. can be detected automatically.

When an error is detected in the displayed image, the display apparatus 100 may change the requested resolution requested by the display apparatus 100 back to the first resolution. Accordingly, the content providing apparatus 200 may prevent an error from occurring in the image by outputting the image having the first resolution to the display apparatus 100 . It will be described later in detail with reference to the drawings.

2 is a flowchart illustrating a method of operating a display apparatus according to an exemplary embodiment.

Referring to FIG. 2 , the display apparatus 100 may receive and display a first image output from the connected content providing apparatus 200 ( S210 ).

When the display apparatus 100 and the content providing apparatus 200 according to an embodiment are connected, the display apparatus 100 may transmit a requested resolution set to the content providing apparatus 200 through EDID information. In this case, the requested resolution set may include a plurality of resolutions, and the plurality of resolutions may have priority. Alternatively, one of the plurality of resolutions may be set as a recommended resolution, and other resolutions may be set as other resolutions.

The content providing apparatus 200 may receive the requested resolution set from the display apparatus 100 and determine whether the content providing apparatus 200 can support a plurality of resolutions included in the requested resolution set according to priority. For example, when the first resolution having the first priority is supported by the content providing apparatus 200 , the content providing apparatus 200 may output an image having the first resolution to the display apparatus 100 . On the other hand, when the first resolution having the first priority is not supported by the content providing apparatus 200 , the image may be output to the display apparatus 100 at the second resolution having the second priority.

Alternatively, when a recommended resolution among a plurality of resolutions included in the requested resolution set is supported by the content providing apparatus 200 , the content providing apparatus 200 may output an image having the recommended resolution to the display apparatus 100 . . On the other hand, when the recommended resolution is not supported by the content providing apparatus 200 , an image having any one of other resolutions among a plurality of resolutions may be output to the display apparatus 100 .

The first image displayed on the display apparatus 100 may have a preset resolution and an aspect ratio according to an output resolution of the content providing apparatus 200 and display characteristics of the display apparatus 100 . For example, the first image may have a first resolution of 3840 x 2160 having an aspect ratio of 16:9.

The display apparatus 100 may change the requested resolution (or the requested resolution set) from the first resolution to the second resolution ( S220 ). For example, based on a user input for switching to the wide screen mode, the display apparatus 100 may change the resolution of the displayed screen from 3840 x 2160 having an aspect ratio of 16:9 to 2560 x having an aspect ratio of 21:9. It can be changed to a second resolution of 1080. When the resolution of the displayed image is changed from 16:9 to 21:9, a black screen may be included in upper and lower regions of the image. However, the present invention is not limited thereto.

Also, in response to the screen mode change, the content providing apparatus 200 may request to output an image having the second resolution (eg, 2560 x 1080 having an aspect ratio of 21:9). In this case, the display apparatus 100 may change the requested resolution by changing the requested resolution set included in the EDID information.

When the requested resolution of the display apparatus 100 is changed, the content providing apparatus 200 may output a second image having a second resolution or a different resolution to the display apparatus 100 according to the changed requested resolution. For example, when the content providing apparatus 200 supports the second resolution, the content providing apparatus 200 may output a second image having the second resolution to the display apparatus 100 . On the other hand, when the content providing apparatus 200 cannot support the second resolution, the content providing apparatus 200 may output a second image having a resolution other than the second resolution to the display apparatus 100 .

The display apparatus 100 may receive and display the second image output from the content providing apparatus 200 (S230).

The display apparatus 100 may determine whether an error has occurred in the second image by comparing the first image with the second image (S240). For example, the display apparatus 100 compares the image data of each of the first image displayed before the requested resolution is changed and the second image displayed after the resolution change, so that a part of the image data included in the first image is displayed as the second image. When the image is lost, it may be determined that an error has occurred in the second image. Alternatively, the display apparatus 100 compares the aspect ratio of the first image with the aspect ratio of a partial image corresponding to the first image among the second images. If the aspect ratios do not match, it is determined that an error has occurred in the second image. can decide However, these are only examples, and the display apparatus 100 according to an embodiment may determine whether an error occurs in the second image in various ways.

When an error occurs in the second image, the display apparatus 100 may change the requested resolution from the second resolution to the first resolution again ( S250 ). For example, the display apparatus 100 may end the wide screen mode and switch back to the 16:9 screen mode. In addition, the display apparatus 100 may notify that an error has occurred in the image, and display a message indicating that the screen mode is changed due to the error occurrence.

As the display resolution of the display apparatus is changed from the second resolution to the first resolution, the content providing apparatus 200 may again output a content image having the first resolution. The display apparatus 100 may receive and display a content image having a first resolution output from the content providing apparatus 200 (S260).

3 is a flowchart illustrating an operation between a content providing apparatus and a display apparatus according to an exemplary embodiment.

Referring to FIG. 3 , the display apparatus 100 and the content providing apparatus 200 may be connected to each other through various wired/wireless communications ( S310 ). For example, the display apparatus 100 and the content providing apparatus 200 may be connected through an HDMI cable, but is not limited thereto.

When the display apparatus 100 and the content providing apparatus 200 according to an embodiment are connected to each other, the content providing apparatus 200 stores an EDID (Extended Display Identification Data) storage unit (eg, EDID) of the display apparatus 100 . ROM) to obtain the EDID information recorded in the EDID storage unit. Alternatively, when the content providing device 200 requests EDID information from the display device 100 ( S320 ), in response to the request, the display device 100 provides EDID information from the EDID storage unit to the content providing device 200 . You can (S330).

Alternatively, when the display apparatus 100 and the content providing apparatus 200 are connected through communication, the display apparatus 100 accesses the EDID storage unit of the content providing apparatus 200 to obtain EDID information recorded in the EDID storage unit. can Alternatively, when the display apparatus 100 requests EDID information from the content providing apparatus 200 , the content providing apparatus 200 may provide the EDID information of the EDID storage unit to the display apparatus 100 in response to the request.

EDID information according to an embodiment includes device name, ID, model name, manufacturer, date of manufacture, serial number, maximum display size of image, aspect ratio, horizontal frequency, vertical frequency, maximum resolution, gamma, DPMS (Display Power Management) Signaling) mode support, information on a supportable video mode, etc. may be included, and additional information may be further included if necessary. For example, the EDID information may additionally include at least one of image request information (a request resolution set including a plurality of resolutions) or image type information.

The content providing apparatus 200 provides information related to the display characteristics of the display apparatus 100 included in the EDID information of the display apparatus 100 (eg, the maximum display size of the image, the aspect ratio, the maximum resolution, the setting resolution, the screen mode, etc.) and image request information (a request resolution set including a plurality of resolutions), an aspect ratio and an output resolution of an image output to the display apparatus 100 may be determined. The content providing apparatus 200 may receive the requested resolution set from the display apparatus 100 and determine whether the content providing apparatus 200 can support a plurality of resolutions included in the requested resolution set according to priority. The content providing apparatus 200 may determine an output resolution of an image output to the display apparatus 100 based on whether support is possible.

When the content providing apparatus 200 supports the first resolution having the first priority among the plurality of resolutions included in the requested resolution set, the content providing apparatus 200 displays the first image having the first resolution to the display device. (100) can be output (S335). For example, the content providing apparatus 200 may transmit the first image to the display apparatus 100 through wired/wireless communication connected to the display apparatus 100 .

The display apparatus 100 may display the first image received from the content providing apparatus 200 on the display (S340).

The display apparatus 100 according to an embodiment may provide screen modes having various resolutions and aspect ratios, and may change a screen mode (resolution of a displayed image) based on a user input ( S345 ).

For example, the display apparatus 100 may provide a 16:9 screen mode, a 21:9 screen mode, a 32:9 screen mode, and the like, but is not limited thereto.

Based on the user input for switching to the 21:9 screen mode (wide screen mode), the resolution of the displayed image is changed from 3840 x 2160 with an aspect ratio of 16:9 to 2560 x 1080 with an aspect ratio of 21:9 can be When the resolution of the displayed image is changed from 16:9 to 21:9, a black screen may be included in upper and lower regions of the image. However, the present invention is not limited thereto.

When the screen mode of the display apparatus 100 is changed, the requested resolution requested by the content providing apparatus 200 may be changed (S350). The display apparatus 100 may request the content providing apparatus 200 to output an image at a specific resolution by using the EDID information. For example, resolution information (eg, a requested resolution set) among EDID information stored in the EDID storage unit of the display apparatus 100 may be changed. The content providing apparatus 200 may detect a change in the requested resolution of the display apparatus 100 based on the changed requested resolution set among the EDID information.

Accordingly, the content providing apparatus 200 may change the output resolution based on the requested resolution (S355). Accordingly, the content providing apparatus 200 may output a second image having a second resolution or another resolution to the display apparatus 100 ( S360 ). For example, when the content providing apparatus 200 supports the second resolution, the content providing apparatus 200 may output a second image having the second resolution to the display apparatus 100 . On the other hand, when the content providing apparatus 200 cannot support the second resolution, the content providing apparatus 200 may output a second image having a resolution other than the second resolution to the display apparatus 100 . The content providing apparatus 200 may transmit the second image to the display apparatus 100 through wired/wireless communication.

The display apparatus 100 may display the second image received from the content providing apparatus 200 on the display (S365).

The display apparatus 100 according to an embodiment may determine whether an error has occurred in the second image by comparing the first image with the second image (S370). For example, when image data of each of the first image displayed before the requested resolution is changed and the second image displayed after the requested resolution is changed is compared, and a part of image data included in the first image is lost in the second image , it may be determined that an error has occurred in the second image. Alternatively, the display apparatus 100 compares the aspect ratio of the first image with the aspect ratio of a partial image corresponding to the first image among the second images. If the aspect ratios do not match, it is determined that an error has occurred in the second image. can decide However, these are only examples, and the display apparatus 100 according to an embodiment may determine whether an error occurs in the second image in various ways.

When an error occurs in the second image, the display apparatus 100 may change the requested resolution from the second resolution to the first resolution again (S375). For example, the display apparatus 100 terminates the 21:9 screen mode (wide screen mode), and sets the requested resolution from 2560 x 1080 with a 21:9 aspect ratio to 3840 x 2160 with a 16:9 aspect ratio. can be changed to

When the requested resolution is changed in the display apparatus 100, the requested resolution set among the EDID information stored in the EDID storage unit of the display apparatus 100 may be changed, and the content providing apparatus 200 based on the changed requested resolution set, A change in resolution requested by the display device may be detected.

Accordingly, the content providing apparatus 200 may change the output resolution of the image output to the display apparatus 100 based on the changed requested resolution (S385). The content providing apparatus 200 may again output the first image having the first resolution to the display apparatus 100 ( S390 ). For example, an image of 3840 x 2160 having an aspect ratio of 16:9 may be output to the display apparatus 100 .

The display apparatus 100 may display the first image received from the content providing apparatus 200 on the display (S395).

4 and 5 are diagrams referenced to describe an operation of detecting whether an error occurs when a display device changes a requested resolution according to an exemplary embodiment.

4 and 5 , when another display apparatus 100 requests an image having a resolution of 3840 x 2160 having an aspect ratio of 16:9 from the content providing apparatus 200 according to an embodiment, content is provided The device 200 may output the first image of the content to the display device 100 .

The content provided by the content providing apparatus 200 according to an embodiment may include image data corresponding to the first area 401 . When the requested resolution of the display apparatus 100 is set to the first resolution (eg, a resolution of 3840 x 2160 having an aspect ratio of 16:9), the content providing apparatus 200 provides the requested resolution of the display apparatus 100 Based on , the first image data 411 corresponding to the second area 402 of the first area 401 may be transmitted to the display apparatus 100 . The content providing apparatus 200 may support the first resolution, and may transmit the first image data 411 having the first resolution to the display apparatus 100 .

The display apparatus 100 may receive the first image data 411 , and a first resolution corresponding to the first image data 411 at a first resolution (a resolution of 3840 x 2160 having an aspect ratio of 16:9). An image 410 may be displayed.

The display apparatus 100 according to an exemplary embodiment allows a displayed image to have a resolution of 2560 x 1080 having an aspect ratio of 21:9 based on a user input for switching to a 21:9 screen mode (wide screen mode). You can adjust the screen. However, this is only an example, and the display apparatus 100 may provide screen modes having various aspect ratios and resolutions.

When the screen mode of the display apparatus 100 is changed, the display apparatus 100 may change the requested resolution requested by the content providing apparatus 200 . The content providing apparatus 200 may transmit image data corresponding to the changed requested resolution to the display apparatus 100 .

For example, as shown in FIG. 4 , when the requested resolution is changed to a second resolution (eg, a resolution of 2560 x 1080 with an aspect ratio of 21:9), the content providing apparatus 200 may perform the first The second image data 421 corresponding to the third area 403 among the areas 401 may be transmitted to the display apparatus 100 . The content providing apparatus 200 may support the second resolution, and may transmit the second image data 421 having the second resolution to the display apparatus 100 .

The display apparatus 100 may receive the second image data 421 , and a second resolution corresponding to the second image data 421 at a second resolution (a resolution of 2560 x 1080 with an aspect ratio of 21:9). An image 420 may be displayed.

At this time, the display apparatus 100 compares the first image 410 displayed on the display before the requested resolution is changed with the second image 420 displayed on the display after the requested resolution is changed, and the second image 420 is You can determine whether or not an error has occurred.

For example, the display apparatus 100 compares the first image data 411 included in the first image 410 with the second image data 421 included in the second image 420 to obtain the first image When at least a portion of the data 411 is not included in the second image data 421 , it may be determined that an error has occurred in the second image 420 .

Referring to FIG. 4 , since all of the first image data 411 is included in the second image data 421 , the display apparatus 100 may determine that an error does not occur in the second image 420 .

On the other hand, as shown in FIG. 5 , when the requested resolution is changed to the second resolution (a resolution of 2560 x 1080 with an aspect ratio of 21:9), the content providing apparatus 200 is displayed in the first area 401 . The third image data 431 corresponding to the fourth area 404 may be transmitted to the display apparatus 100 .

The display apparatus 100 may receive the third image data 431 , and a third image corresponding to the third image data 431 with a third resolution (a resolution of 2560 x 1080 with an aspect ratio of 21:9). 430 may be displayed.

In this case, the display apparatus 100 compares the first image 410 displayed on the display before the requested resolution is changed with the third image displayed on the display after the resolution is changed, and an error occurs in the third image 430 . You can decide whether or not

For example, the display apparatus 100 compares the first image data 411 included in the first image 410 with the third image data 431 included in the third image 430 to obtain the first image When at least a portion of the data 411 is not included in the third image data 431 , it may be determined that an error has occurred in the third image 430 .

Referring to FIG. 5 , since some data 510 of the first image data 411 are not included in the third image data, the display apparatus 100 may determine that an error has occurred in the third image 430 .

However, in FIG. 5 , if the entire first image data 411 is not included in the third image data 431 , it is determined that an error has occurred in the third image 430 , but the present invention is not limited thereto. For example, in the display apparatus 100 according to an embodiment, there is a discrepancy between the image data of the first image displayed on the display before the requested resolution is changed and the image data of the second image displayed on the display after the requested resolution is changed. When the ratio of the data area to be used (for example, the ratio of the data area that does not match between the image data of the first image and the image data of the second image to the entire area of the first image or the second image) is less than a preset value, When it is determined that no error has occurred in the second image and the ratio of the data areas that do not match is equal to or greater than a preset value, it may be determined that an error has occurred in the second image.

6 and 7 are diagrams referenced to explain an operation of detecting whether an error occurs when a display device changes a requested resolution according to an exemplary embodiment.

The display apparatus 100 according to an embodiment compares the aspect ratio of the third image of the region corresponding to the first image among the first image displayed before the requested resolution change and the second image displayed after the requested resolution change, Whether an error occurs in the second image may be determined.

For example, referring to FIG. 6 , the display apparatus 100 may display the first image 610 at a first resolution (a resolution of 3840 x 2160 having an aspect ratio of 16:9). When the requested resolution of the display apparatus 100 is changed to a second resolution (a resolution of 2560 x 1080 having an aspect ratio of 21:9), the display apparatus 100 may display a second resolution (a resolution of 2560 x 1080 having an aspect ratio of 21:9). The second image 620 may be displayed with a resolution of 2560 x 1080). In this case, the image data corresponding to the first image 610 is all included in the image data corresponding to the second image 620 .

The display apparatus 100 compares the aspect ratio of the first image 610 with the aspect ratio of the first area 625 corresponding to the first image 610 among the second images 620 to match within a preset range. , it may be determined that an error does not occur in the second image 620 . For example, when the aspect ratio of the first image 610 is 16:9 and the aspect ratio of the first area 625 is also 16:9, or the screen of the first image 610 is When the ratio has a ratio of 16:9 and the aspect ratio of the first area 625 has a ratio of 16:10, the display apparatus 100 may determine that an error does not occur in the second image 620 . have.

In addition, as shown in FIG. 6 , the requested resolution of the display apparatus 100 is a third resolution (a resolution of 3840 x 2160 having an aspect ratio of 16:9) to a third resolution (having an aspect ratio of 32:9). 3840 x 1080 resolution), the display apparatus 100 may display the third image 630 at the third resolution (3840 x 1080 resolution with an aspect ratio of 32:9). In this case, the image data corresponding to the first image 610 is all included in the image data corresponding to the third image 630 .

The display apparatus 100 compares the aspect ratio of the first image 610 with the aspect ratio of the second area 635 corresponding to the first image 610 among the third image 630 to match within a preset range. In this case, it may be determined that an error does not occur in the third image 630 . For example, when the aspect ratio of the first image 610 is 16:9 and the aspect ratio of the second area 635 also has a ratio of 16:9, or the screen of the first image 610 is When the ratio has a ratio of 16:9 and the aspect ratio of the second area 635 has a ratio of 16:10, the display apparatus 100 may determine that an error does not occur in the third image 630 . have.

Meanwhile, referring to FIG. 7 , the display apparatus 100 may display the first image 710 at a first resolution (a resolution of 3840 x 2160 having an aspect ratio of 16:9). When the requested resolution of the display apparatus 100 is changed to a second resolution (a resolution of 2560 x 1080 having an aspect ratio of 21:9), the display apparatus 100 may display a second resolution (a resolution of 2560 x 1080 having an aspect ratio of 21:9). The second image 720 may be displayed with a resolution of 2560 x 1080).

For example, the content providing apparatus 200 may support the second resolution, but image data provided by software (eg, a game application) executed in the content providing apparatus 200 corresponds to an image corresponding to the first resolution. When only data is supported, the content providing apparatus 200 may transmit the second image 720 by scaling the image data corresponding to the first resolution to the second resolution to the display apparatus 100 . Accordingly, the image data corresponding to the first image 710 and the image data corresponding to the second image 720 are the same.

However, since the aspect ratio at which the first image data is displayed is 16:9 and the aspect ratio at which the second image data is displayed does not match within a preset range of 21:9, the display apparatus 100 displays the second image. It can be determined that an error has occurred.

Also, as shown in FIG. 7 , the display resolution of the display apparatus 100 is a third resolution (a resolution of 3840 x 2160 having an aspect ratio of 16:9) to a third resolution (having an aspect ratio of 32:9). 3840 x 1080 resolution), the display apparatus 100 may display the third image 730 at the third resolution (3840 x 1080 resolution with an aspect ratio of 32:9). For example, the content providing apparatus 200 may support the third resolution, but image data provided by software (eg, a game application) executed in the content providing apparatus 200 corresponds to the first resolution. When only data is supported, the content providing apparatus 200 may transmit a third image 730 obtained by scaling image data corresponding to the first resolution to the third resolution to the display apparatus 100 . Accordingly, the first image data corresponding to the first image 710 and the third image data corresponding to the third image 730 are the same.

However, since the aspect ratio at which the first image data is displayed is 16:9 and the aspect ratio at which the third image data is displayed does not match within a preset range of 32:9, the display apparatus 100 displays the fourth image. It can be determined that an error has occurred.

Alternatively, the display apparatus 100 according to an embodiment may set a comparison target area having the same ratio in the image displayed before the requested resolution change and the image displayed after the requested resolution change. For example, in FIG. 7 , by comparing the entire area of the first image 710 having an aspect ratio of 16:9 with the first area 725 having a ratio of 16:9 in the second image 720 , You can decide whether the video matches or not. In this case, when the first image 710 and the image of the first region 725 match within a preset range, the display apparatus 100 may determine that an error does not occur in the second image 720 . On the other hand, when the first image 710 and the image of the first region 725 do not match within a preset range, the display apparatus 100 may determine that an error has occurred in the second image 720 .

Also, in FIG. 7 , by comparing the entire area of the first image 710 having an aspect ratio of 16:9 with the second area 735 having a ratio of 16:9 in the third image 730, image matching is performed. can decide whether In this case, when the first image 710 and the image of the second region 735 match within a preset range, the display apparatus 100 may determine that an error does not occur in the third image 730 . On the other hand, when the first image 710 and the image of the second region 735 do not match within a preset range, the display apparatus 100 may determine that an error has occurred in the third image 730 .

8 is a diagram illustrating examples of outputting a notification message when an error occurs in an image displayed by a display device according to an exemplary embodiment.

When the requested resolution of the display apparatus 100 is changed from the first resolution to the second resolution, and an image having the second resolution is output to the display apparatus 100 , the user (viewer) sees the image (second resolution) after the requested resolution change. It may be difficult to recognize that an error has occurred in an image having a resolution).

Accordingly, the display apparatus 100 may generate a notification message indicating that an error has occurred in the image (image having the second resolution) after the requested resolution is changed.

Referring to FIG. 8 , the display apparatus 100 according to an exemplary embodiment displays a message 810 asking whether to change the requested resolution back to the resolution (first resolution) before the change along with the content “Image error has been confirmed” can do. Alternatively, as shown in FIG. 8 , when an error occurs in the image after the requested resolution change (the image having the second resolution), the display apparatus 100 changes the requested resolution of the display apparatus 100 to the resolution before changing again (first resolution). 1 resolution). Also, the display apparatus 100 may display a message 820 indicating that the requested resolution is automatically changed due to an image error. In addition, the notification message may be displayed in the form of a pop-up message, but is not limited thereto, and may be displayed in various contents and forms.

9 is a block diagram illustrating a configuration of a display apparatus according to an exemplary embodiment.

Referring to FIG. 9 , the display apparatus 100 according to an embodiment may include an input/output unit 110 , a processor 120 , a memory 130 , and a display 140 .

The input/output unit 110 according to an embodiment includes video (eg, moving picture, etc.), audio (eg, voice, music, etc.) and additional information (eg, EPG, etc.) For example, the input/output unit 110 includes a High-Definition Multimedia Interface (HDMI) port, a Mobile High-Definition Link (MHL) port, a Universal Serial Bus (USB) port, a Display Port (DP), and a Thunderbolt (Thunderbolt) port. ) port, VGA (Video Graphics Array) port, RGB port, D-SUB (D-subminiature), DVI (Digital Visual Interface), component jack, PC port have. However, the present invention is not limited thereto, and the configuration and operation of the input/output unit 110 may be variously implemented according to an embodiment of the present invention.

In addition, the display apparatus 100 according to an embodiment may be connected to an external device through short-range wireless communication such as wireless LAN or Bluetooth to transmit/receive video, audio, and additional information.

The display apparatus 100 according to an embodiment may be connected to the content providing apparatus 200 through an HDMI port, and the input/output unit 110 receives an EDID information request from the content providing apparatus 200 through a DDC channel. Received and in response to the request, EDID information of the display apparatus 100 may be transmitted to the content providing apparatus 200 . Also, the input/output unit 110 may receive an image output from the content providing apparatus 200 . The image received by the input/output unit 110 may be displayed on the display 140 under the control of the processor 120 .

The display 140 according to an embodiment converts an image signal, a data signal, an OSD signal, a control signal, etc. processed by the processor 120 to generate a driving signal. The display 140 may be implemented as a PDP, LCD, OLED, flexible display, etc., and may also be implemented as a three-dimensional display (3D display). Also, the display 140 may be configured as a touch screen and used as an input device in addition to an output device.

Also, the display 140 according to an embodiment may provide screen modes having various resolutions and aspect ratios. For example, the display 140 may provide screen modes having an aspect ratio of 4:3, 16:9, 16:10, 21:9, and 32:9, and a screen having various resolutions according to the aspect ratio. mods can be provided. For example, in the aspect ratio of 16:9, screen modes with resolutions of 1280 x 720, 1366 x 768, 1600 x 900, 1920 x 1080, 2560 x 1440, 3840 x 2160, 5120 x 2880, 7680 x 4320 are provided. In an aspect ratio of 21:9, screen modes having resolutions of 2560 x 1080, 3440 x 1440, and 5120 x 2160 may be provided.

The processor 120 according to an embodiment may execute one or more programs stored in the memory 130 . The processor 120 may include a single core, a dual core, a triple core, a quad core, and multiple cores thereof. Also, the processor 120 may include a plurality of processors. For example, the processor 120 may be implemented as a main processor (not shown) and a sub processor (not shown) operating in a sleep mode.

The memory 130 according to an embodiment may store various data, programs, or applications for driving and controlling the display apparatus 100 .

Also, a program stored in the memory 130 may include one or more instructions. A program (one or more instructions) or an application stored in the memory 130 may be executed by the processor 120 .

The processor 120 according to an embodiment may change the requested resolution of the display 140 from the first resolution to the second resolution by executing one or more instructions stored in the memory 130 . For example, the processor 120 may change the requested resolution from a first resolution (3840 x 2160 with an aspect ratio of 16:9) to a second resolution (a screen of 21:9) based on a user input for switching to the wide screen mode. It can be changed to 2560 x 1080) with a ratio. However, the present invention is not limited thereto.

The processor 120 may determine whether an error occurs in the second image by comparing the first image displayed before the requested resolution change with the second image displayed after the resolution change. For example, the processor 120 compares the image data of each of the first image displayed before the requested resolution is changed and the second image displayed after the requested resolution is changed, so that a part of the image data included in the first image is changed to the second image. When the image is lost, it may be determined that an error has occurred in the second image. Alternatively, the processor 120 compares the aspect ratio of the first image with the aspect ratio of a partial image corresponding to the first image among the second images, and determines that an error has occurred in the second image when the aspect ratios do not match. can However, these are only examples, and the processor 120 according to an embodiment may determine whether an error has occurred in the second image in various ways.

When an error occurs in the second image, the processor 120 may change the requested resolution of the display 140 from the second resolution back to the first resolution. For example, the processor 120 may end the wide screen mode and switch back to the 16:9 screen mode. Also, the processor 120 may control the display 140 to notify that an error has occurred in the image and display a message indicating that the screen mode is changed due to the error occurrence.

10 is a block diagram illustrating a configuration of a content providing apparatus according to an exemplary embodiment.

Referring to FIG. 10 , the content providing apparatus 200 according to an embodiment may include an input/output unit 210 , a processor 220 , and a memory 230 .

The input/output unit 210 according to an embodiment communicates the content providing apparatus 200 with an external server or an external device to receive or transmit content. For example, the input/output unit 210 includes a High-Definition Multimedia Interface (HDMI) port, a Mobile High-Definition Link (MHL) port, a Universal Serial Bus (USB) port, a Display Port (DP), and a Thunderbolt (Thunderbolt) port. ) port, VGA (Video Graphics Array) port, RGB port, D-SUB (D-subminiature), DVI (Digital Visual Interface), component jack, PC port have. However, the present invention is not limited thereto, and the configuration and operation of the input/output unit 210 may be variously implemented according to an embodiment of the present invention. Also, the content providing apparatus 200 according to an embodiment may be connected to an external device through short-range wireless communication such as wireless LAN or Bluetooth to transmit and receive content.

For example, the input/output unit 210 may be connected to the display apparatus 100 to receive EDID information of the display apparatus 100 from the display apparatus 100 , and output content to the display apparatus 100 . can do.

The processor 220 according to an embodiment may control the overall operation of the content providing apparatus 200 . Specifically, the processor 220 may control a process in which the content image being reproduced by the content providing apparatus 200 is output to the display apparatus 100 .

The processor 220 may execute one or more programs stored in the memory 230 . The memory 230 according to an embodiment may store various data, programs, or applications for driving and controlling the content providing apparatus 200 .

Also, a program stored in the memory 230 may include one or more instructions. A program (one or more instructions) or an application stored in the memory 230 may be executed by the processor 220 .

The content providing apparatus 200 according to an embodiment may receive content transmitted from an external device or an external server. The content providing apparatus 200 may receive content from an external recording medium such as a USB memory or HDD. Alternatively, content recorded on the optical disc may be read from an optical disc such as a DVD or Blu-ray disc.

The processor 220 according to an embodiment may reproduce content by executing one or more instructions stored in the memory 130 , and may be implemented in various forms according to embodiments. For example, the processor 220 may process the content data received by the content providing apparatus 200 .

The processor 220 includes information related to the display characteristics of the display apparatus 100 included in the EDID information received from the display apparatus 100 connected to the content providing apparatus 200 (eg, a maximum display size of an image, an aspect ratio). , maximum resolution, set resolution, screen mode, etc.) and the requested resolution, the screen ratio and output resolution of the content image output to the display apparatus 100 may be determined. For example, when the requested resolution of the display apparatus 100 is changed, the processor 220 may also change the output resolution of the content providing apparatus 200 based on the changed requested resolution.

11 is a block diagram illustrating a configuration of a display apparatus according to another exemplary embodiment.

Referring to FIG. 11 , the display apparatus 1100 of FIG. 11 may be an embodiment of the display apparatus 100 described with reference to FIGS. 1 to 9 .

Referring to FIG. 11 , a display apparatus 1100 according to an exemplary embodiment includes a tuner unit 1140 , a processor 1110 , a display unit 1120 , a communication unit 1150 , a sensing unit 1130 , and an input/output unit. 1170 , a video processing unit 1180 , an audio processing unit 1185 , an audio output unit 1160 , a memory 1190 , and a power supply unit 1195 .

The input/output unit 1170 of FIG. 11 has a configuration corresponding to the input/output unit 110 of FIG. 9 , and the processor 1110 of FIG. 11 is connected to the processor 120 of FIG. 9 and the memory 1190 of FIG. ) corresponds to the memory 130 of FIG. 9 , and the display unit 1120 of FIG. 11 corresponds to the display 140 of FIG. 9 . Accordingly, the same contents as those described above will be omitted.

The tuner unit 1140 according to an embodiment of the display device 1100 is configured to receive a broadcast signal received by wire or wirelessly from among many radio wave components through amplification, mixing, resonance, etc. It can be selected by tuning only the frequency of the channel. The broadcast signal includes audio, video, and additional information (eg, Electronic Program Guide (EPG)).

The tuner unit 1140 may receive broadcast signals from various sources such as terrestrial broadcast, cable broadcast, satellite broadcast, Internet broadcast, and the like. The tuner unit 1140 may receive a broadcast signal from a source such as analog broadcast or digital broadcast.

The communication unit 1150 according to an embodiment may transmit/receive data or signals to and from an external device or server under the control of the processor 1110 . The processor 1110 may transmit/receive content to/from an external device connected through the communication unit 1150 , download an application from the external device, or perform web browsing. In response to the performance and structure of the display device 1100 , the communication unit 1150 may perform data or Signals can be sent and received.

The sensing unit 1130 according to an embodiment detects a user's voice, a user's image, or a user's interaction, and may include a microphone 1131 , a camera unit 1132 , and a light receiving unit 1133 .

The microphone 1131 receives the user's utterance voice. The microphone 1131 may convert the received voice into an electrical signal and output it to the processor 1110 . The user's voice may include, for example, a voice corresponding to a menu or function of the display apparatus 1100 .

The camera unit 1132 may receive an image (eg, a continuous frame) corresponding to a user's motion including a gesture in a camera recognition range. The processor 1110 may select a menu displayed on the display apparatus 1100 by using the received motion recognition result or perform a control corresponding to the motion recognition result.

The light receiving unit 1133 receives an optical signal (including a control signal) received from an external control device through a light window (not shown) of the bezel of the display unit 1120 . The light receiver 1133 may receive an optical signal corresponding to a user input (eg, touch, press, touch gesture, voice, or motion) from the control device. A control signal may be extracted from the received optical signal under the control of the processor 1110 .

The processor 1110 controls the overall operation of the display apparatus 1100 and a signal flow between internal components of the display apparatus 1100 , and performs a function of processing data. The processor 1110 may execute an operating system (OS) and various applications stored in the memory 1190 when there is a user input or a preset stored condition is satisfied.

The processor 1110 stores a signal or data input from the outside of the display apparatus 1100 or a RAM used as a storage area corresponding to various operations performed in the display apparatus 1100 , the display apparatus 1100 . It may include a ROM and a processor in which a control program for controlling the controller is stored.

The video processing unit 1180 processes the video data received by the display apparatus 1100 . The video processing unit 1180 may perform various image processing, such as decoding, scaling, noise filtering, frame rate conversion, and resolution conversion, on video data.

The display unit 1120 converts an image signal, a data signal, an OSD signal, a control signal, etc. processed by the processor 1110 to generate a driving signal. The display unit 1120 may be implemented as a PDP, LCD, OLED, flexible display, etc., and may also be implemented as a 3D display. Also, the display unit 1120 may be configured as a touch screen and used as an input device in addition to an output device.

The audio processing unit 1185 processes audio data. The audio processing unit 1185 may perform various processes such as decoding, amplification, and noise filtering on audio data. Meanwhile, the audio processing unit 1185 may include a plurality of audio processing modules to process audio corresponding to a plurality of contents.

The audio output unit 1160 outputs audio included in the broadcast signal received through the tuner unit 1140 under the control of the processor 1110 . The audio output unit 1160 may output audio (eg, voice, sound) input through the communication unit 1150 or the input/output unit 1170 . Also, the audio output unit 1160 may output audio stored in the memory 1190 under the control of the processor 1110 . The audio output unit 1160 may include at least one of a speaker, a headphone output terminal, and a Sony/Philips Digital Interface (S/PDIF) output terminal.

The power supply unit 1195 supplies power input from an external power source to the components inside the display apparatus 1100 under the control of the processor 1110 . Also, the power supply unit 1195 may supply power output from one or more batteries (not shown) positioned inside the display apparatus 1100 to internal components under the control of the processor 1110 .

The memory 1190 may store various data, programs, or applications for driving and controlling the display apparatus 1100 under the control of the processor 1110 . The memory 1190 includes a broadcast reception module, a channel control module, a volume control module, a communication control module, a voice recognition module, a motion recognition module, a light reception module, a display control module, an audio control module, an external input control module, and a power supply not shown. It may include a control module, a power control module of an external device connected wirelessly (eg, Bluetooth), a voice database (DB), or a motion database (DB). Modules and databases (not shown) of the memory 1190 have a broadcast reception control function, a channel control function, a volume control function, a communication control function, a voice recognition function, a motion recognition function, and a light reception control function in the display device 1100 . , a display control function, an audio control function, an external input control function, a power control function, or a power control function of an external device connected wirelessly (eg, Bluetooth) may be implemented in software form. The processor 1110 may perform respective functions using these software stored in the memory 1190 .

Meanwhile, the block diagrams of the display apparatuses 100 and 1100 illustrated in FIGS. 9 and 11 are block diagrams for an exemplary embodiment. Each component in the block diagram may be integrated, added, or omitted according to the specifications of the actually implemented display apparatuses 100 and 1100 . That is, two or more components may be combined into one component, or one component may be subdivided into two or more components as needed. In addition, the function performed in each block is for describing the embodiments, and the specific operation or device does not limit the scope of the present invention.

The method of operating a display apparatus according to an embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of the computer-readable recording medium include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic such as floppy disks. - includes magneto-optical media, and hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like.

In addition, the display apparatus and the method of operating the display apparatus according to the disclosed embodiments may be provided by being included in a computer program product. Computer program products may be traded between sellers and buyers as commodities.

The computer program product may include a S/W program and a computer-readable storage medium in which the S/W program is stored. For example, computer program products may include products (eg, downloadable apps) in the form of S/W programs distributed electronically through manufacturers of electronic devices or electronic markets (eg, Google Play Store, App Store). have. For electronic distribution, at least a portion of the S/W program may be stored in a storage medium or may be temporarily generated. In this case, the storage medium may be a server of a manufacturer, a server of an electronic market, or a storage medium of a relay server temporarily storing a SW program.

The computer program product, in a system consisting of a server and a client device, may include a storage medium of the server or a storage medium of the client device. Alternatively, when there is a third device (eg, a smart phone) that is communicatively connected to the server or the client device, the computer program product may include a storage medium of the third device. Alternatively, the computer program product may include the S/W program itself transmitted from the server to the client device or the third device, or transmitted from the third device to the client device.

In this case, one of the server, the client device and the third device may execute the computer program product to perform the method according to the disclosed embodiments. Alternatively, two or more of a server, a client device, and a third device may execute a computer program product to distribute the method according to the disclosed embodiments.

For example, a server (eg, a cloud server or an artificial intelligence server) may execute a computer program product stored in the server to control a client device communicatively connected with the server to perform the method according to the disclosed embodiments.

Although the embodiments have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also included in the scope of the present invention. belongs to

Claims (21)

In the display device,
an input/output unit for requesting a first resolution from a content providing device and receiving a first image having the first resolution from the content providing device;
a display for displaying the first image;
a memory storing one or more instructions; and
a processor executing the one or more instructions stored in the memory;
The processor is
changing the requested resolution requested by the content providing device from the first resolution to a second resolution;
In response to the change of the requested resolution, receiving a second image from the content providing device, and controlling the display to display the received second image;
By determining whether an error occurs in the displayed second image,
and changing the requested resolution from the second resolution to the first resolution when an error occurs in the second image. According to claim 1,
The processor is
The display device is configured to change the requested resolution based on a user input for switching to a wide screen mode. According to claim 1,
and a first aspect ratio of the first resolution and a second aspect ratio of the second resolution are different from each other. According to claim 1,
The processor is
and determining whether an error has occurred in the second image by comparing the first image with the second image. 5. The method of claim 4,
The processor is
When the image data included in the first image is not included in the second image, it is determined that an error has occurred in the second image. 5. The method of claim 4,
The processor is
The first aspect ratio of the first image and the second aspect ratio of the region corresponding to the first image of the second image are compared, and the first aspect ratio and the second aspect ratio match within a preset range If not, it is determined that an error has occurred in the second image, the display device. According to claim 1,
The input/output unit includes a High Definition Multimedia Interface (HDMI),
The display device, wherein the first image and the second image are received from the content providing device through the HDMI. According to claim 1,
The processor is
Controlling the input/output unit to transmit the requested resolution to the content providing device through EDID information. According to claim 1,
The processor is
When an error occurs in the second image, controlling the display to display the image having the first resolution. According to claim 1,
The processor is
When an error occurs in the second image, the display device is configured to control the display to output a message indicating that an error has occurred in the second image. A method of operating a display device, comprising:
receiving a first image having the first resolution from the content providing device by requesting a first resolution from the content providing device;
displaying the first image;
changing the requested resolution requested by the content providing device from the first resolution to a second resolution;
receiving a second image from the content providing device in response to the requested resolution change;
displaying the received second image;
determining whether an error occurs in the displayed second image; and
and changing the requested resolution from the second resolution to the first resolution when an error occurs in the second image. 12. The method of claim 11,
Changing the resolution of the display from the first resolution to the second resolution comprises:
and changing the requested resolution based on a user input for switching to a wide screen mode. 12. The method of claim 11,
The method of claim 1, wherein the first aspect ratio of the first resolution and the second aspect ratio of the second resolution are different from each other. 12. The method of claim 11,
The step of determining whether an error occurs in the displayed second image includes:
and determining whether an error has occurred in the second image by comparing the first image with the second image. 15. The method of claim 14,
The step of determining whether an error occurs in the displayed second image includes:
and determining that an error has occurred in the second image when the image data included in the first image is not included in the second image. 15. The method of claim 14,
The step of determining whether an error occurs in the displayed second image includes:
The first aspect ratio of the first image and the second aspect ratio of the region corresponding to the first image of the second image are compared, and the first aspect ratio and the second aspect ratio match within a preset range if not, determining that an error has occurred in the second image. 12. The method of claim 11,
The method of operating a display device, wherein the first image and the second image are received from the content providing device through the HDMI. 12. The method of claim 11,
The method of operation is
The method of operating a display device, further comprising the step of transmitting the requested resolution to the content providing device through EDID information. 12. The method of claim 11,
The method of operation is
When an error occurs in the second image, the method further comprising the step of displaying the image having the first resolution. 12. The method of claim 11,
The method of operation is
When an error occurs in the second image, the method further comprising the step of outputting a message informing that an error occurs in the second image. One or more computer-readable recording media in which a program for performing the method of claim 11 is stored.

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