# US 2021/0243489 A1 · Display apparatus, method for ui display thereof and computer-readable recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243489 A1 - Document ID: US20210243489A1 - Status: Published application - Kind: A1 - Application number: 17/233,648 - Filed: 2021-04-19 - Published: 2021-08-05 - Earliest claimed: 2013-01-07 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Yeo-ri YOON; Dae-hyun KIM; Han-soo KIM - Web page: https://patentgrep.com/patent/US20210243489A1 ## CPC - H04N 21/42204: {User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor (constructive details of casings for the remote control device H01H9/0235; user interfaces for controlling a tuning device of a television receiver through a remote control H03J9/00; remote control of peripheral devices connected to a television receiver through the remote control device of the television receiver H04B1/205)} - G06F 3/0227: {Cooperation and interconnection of the input arrangement with other functional units of a computer (G06F3/023 - G06F3/037 take precedence)} - H04N 21/42214: {using alphanumerical characters} - H04N 21/42218: {for mapping a matrix of displayed objects on the screen to the numerical key-matrix of the remote control} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A display apparatus is provided. The display apparatus includes a display configured to display a user interface window for receiving a letter input; a communication interface configured to receive a control instruction for inputting letters from a control device; and a controller configured to control the display to selectively display an on-screen keypad for inputting letters on the user interface window based on whether the control device includes letter keys for inputting letters. ## Claims ### Claim 1 A display device comprising: a display; a communication circuitry configured to communicate with an external device; and a processor configured to: control the display to display a text input user interface (UI) for displaying at least one input letter and a keypad UI including a plurality of letter UI items respectively corresponding to a plurality of letters, while the text input UI and the keypad UI are displayed on the display, based on letter information for inputting a letter being received from a first external device through the communication circuitry without using the displayed keypad UI, control the display to cease displaying of the keypad UI on the display while the text input UI is displayed, and control the display to display the letter corresponding to the received letter information on the text input UI. ### Claim 2 (depends on 1) The display device of claim 1, wherein the keypad UI is displayed over at least a portion of content displayed on the display. ### Claim 3 (depends on 2) The display device of claim 2, wherein the processor is further configured to, based on the displaying of the keypad UI being ceased, control the display to display the portion of the content displayed on the display. ### Claim 4 (depends on 1) The display device of claim 1, wherein, after the displaying of the keypad UI is ceased, the letter corresponding to the letter information received from the first external device is maintained on the text input UI. ### Claim 5 (depends on 1) The display device of claim 1, wherein the processor is further configured to: receive, through the communication circuitry, a user command from a second external device not including a plurality of letter keys for inputting letters after the displaying of the keypad UI is ceased, and based on receiving the user command, control the display to display the keypad UI while the text input UI is displayed. ### Claim 6 (depends on 5) The display device of claim 5, wherein the user command is a user command for selecting an area corresponding to the text input UI. ### Claim 7 (depends on 5) The display device of claim 5, wherein the user command is generated by manipulating a button on the second external device while a cursor is displayed on the text input UI. ### Claim 8 (depends on 5) The display device of claim 5, wherein the letter corresponding to the letter information received from the first external device is maintained on the text input UI while the keypad UI is displayed based on receiving the user command from the second external device. ### Claim 9 (depends on 8) The display device of claim 8, wherein the processor is further configured to: control the display to display a cursor on the keypad UI, and based on a letter UI item from among the plurality of letter UI items of the keypad UI being selected through the cursor according to a user manipulation of the second external device while the keypad UI is displayed on the display, control the display to display a letter corresponding to the selected letter UI item on the text input UI. ### Claim 10 (depends on 9) The display device of claim 9, wherein the user manipulation of the second external device includes pressing at least one of four directional keys on the second external device. ### Claim 11 A controlling method of a display device, the controlling method comprising: displaying a text input user interface (UI) for displaying at least one input letter and a keypad UI including a plurality of letter UI items respectively corresponding to a plurality of letters; while the text input UI and the keypad UI are displayed, based on letter information for inputting a letter being received from a first external device without using the displayed keypad UI, ceasing displaying of the keypad UI on the display while maintaining displaying of the text input UI; and displaying the letter corresponding to the received letter information on the text input UI. ### Claim 12 (depends on 11) The controlling method of claim 11, wherein the keypad UI is displayed over at least a portion of content displayed on the display. ### Claim 13 (depends on 12) The controlling method of claim 12, further comprising: based on the displaying of the keypad UI being ceased, displaying the portion of the content displayed on the display. ### Claim 14 (depends on 11) The controlling method of claim 11, wherein, after the displaying of the keypad UI is ceased, the letter corresponding to the letter information received from the first external device is maintained on the text input UI. ### Claim 15 (depends on 11) The controlling method of claim 11, further comprising: receiving a user command from a second external device not including a plurality of letter keys for inputting letters after the displaying of the keypad UI is ceased on the display, and based on receiving the user command, displaying the keypad UI while the text input UI is displayed. ### Claim 16 (depends on 15) The controlling method of claim 15, wherein the user command is a user command for selecting an area corresponding to the text input UI. ### Claim 17 (depends on 15) The controlling method of claim 15, wherein the user command generated by a button on the second external device being manipulated while a cursor is displayed on the text input UI. ### Claim 18 (depends on 15) The controlling method of claim 15, wherein the letter corresponding to the letter information received from the first external device is maintained on the text input UI while the keypad UI is displayed based on receiving the user command. ### Claim 19 (depends on 18) The controlling method of claim 18, further comprising: displaying a cursor on the keypad UI, and based on a letter UI item from among the plurality of letter UI items of the keypad UI being selected through the cursor according to a user manipulation of the second external device while the keypad UI is displayed on the display, displaying a letter corresponding to the selected letter UI item on the text input UI. ### Claim 20 (depends on 19) The controlling method of claim 19, wherein the user manipulation of the second external device includes pressing at least one of four directional keys on the second external device.