# US 2010/0167791 A1 · Portable terminal having flexible display and screen controlling method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0167791 A1 - Document ID: US20100167791A1 - Status: Published application - Kind: A1 - Application number: 12/640,849 - Filed: 2009-12-17 - Published: 2010-07-01 - Earliest claimed: 2008-12-30 - Assignees: LG Electronics Inc. - Inventors: Se-Keun LIM - Web page: https://patentgrep.com/patent/US20100167791A1 ## CPC - H04M 1/0235: {Slidable or telescopic telephones, i.e. with a relative translation movement of the body parts; Telephones using a combination of translation and other relative motions of the body parts} - G06F 1/1624: {with sliding enclosures, e.g. sliding keyboard or display} - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 1/1694: {the I/O peripheral being a single or a set of motion sensors for pointer control or gesture input obtained by sensing movements of the portable computer} - H04M 1/0266: {for a display module assembly} - H04M 1/0245: {using open/close detection} - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H04M 2250/16: including more than one display unit - H04M 2250/22: including a touch pad, a touch sensor or a touch detector - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Disclosed are a portable terminal having a flexible display, and a screen controlling method thereof. When detecting an entertainment key for a film, a game, a navigation and a DMB, a flexible display disposed inside a body is slid to a vertical direction of a main display to have an extended screen. On the other hand, when detecting an incoming call or dropping of the portable terminal in a state that the flexible display has been extended, the flexible display is restored to an initial state. This may allow a user to more conveniently appreciate various entertainments such as films, games, navigations, and DMB, and may effectively prevent damage of the portable terminal. ## Claims ### Claim 1 A screen controlling method for a portable terminal, the method comprising: detecting an input of a predetermined key; extending a screen by sliding a supplementary liquid crystal display (LCD) disposed in a body when the input of the predetermined key has been detected; executing predetermined entertainments on the extended screen; and restoring the slid supplementary LCD to an initial state when an incoming call is received while executing the entertainments. ### Claim 2 (depends on 1) The method of claim 1, wherein the predetermined key is implemented as an entertainment key or a slide button, and wherein the entertainment key comprises a film key, a DMB key, a game key, and a navigation key. ### Claim 3 (depends on 1) The method of claim 1, wherein the supplementary LCD is a flexible LCD. ### Claim 4 (depends on 1) The method of claim 1, wherein the supplementary LCD is disposed in a body so as to overlap a main LCD, or is disposed at a predetermined region in a rolled state like a scroll so as to be slid along a guide disposed at an inner side surface of the body. ### Claim 5 (depends on 1) The method of claim 1, wherein a stiff material having a predetermined size is attached to a rear surface of the supplementary LCD. ### Claim 6 (depends on 1) The method of claim 1, wherein a sliding degree of the supplementary LCD is set to be different according to a type of an entertainment being executed. ### Claim 7 (depends on 1) The method of claim 1, wherein the supplementary LCD is slid with the same sliding degree regardless of a type of an entertainment being executed, by having a sliding degree set as a default. ### Claim 8 (depends on 1) The method of claim 1, wherein the step of extending a screen comprises: checking a setting state of an LCD slide menu when an entertainment key is input; and displaying an operation mode executed by the entertainment key on a main LCD when the LCD sliding menu is in an ‘ON’ state, and automatically sliding the flexible LCD to a vertical direction of the main LCD according to the operation mode. ### Claim 9 (depends on 1) The method of claim 1, further comprising restoring the supplementary LCD to the initial state when a predetermined force is applied to the portable terminal while executing the entertainment. ### Claim 10 (depends on 9) The method of claim 9, wherein the step of restoring the supplementary LCD comprises: determining whether an incoming call is a voice call; checking whether an external headset is connected to the portable terminal if the received incoming call is a voice call; restoring the supplementary LCD to an initial state if the external headset is not connected to the portable terminal; and displaying a video call screen on a predetermined region on the main LCD when the received incoming call is a video call. ### Claim 11 (depends on 1) The method of claim 1, wherein the step of restoring the supplementary LCD comprises: detecting an acceleration of the portable terminal which is dropping; and restoring the supplementary LCD to the initial state at a maximum speed when the detected acceleration of the portable terminal which is dropping is more than a preset threshold value. ### Claim 12 (depends on 1) The method of claim 1, wherein the step of sliding or restoring the supplementary LCD is automatically executed according to an input of a predetermined key, or is executed step by step according to an input frequency and an input time of the predetermined key. ### Claim 13 A portable terminal, comprising: a main liquid crystal display (LCD); a supplementary LCD disposed in a body, and configured to be extendable to outside; and a controller configured to extend the screen by sliding the supplementary LCD when input of a predetermined key has been detected, and configured to restore the slid supplementary LCD to an initial state when an incoming call is received or the portable terminal is dropping in a state that the screen has been extended. ### Claim 14 (depends on 13) The portable terminal of claim 13, wherein the supplementary LCD is disposed in a body so as to overlap the main LCD, or is disposed at a predetermined region in a rolled state like a scroll so as to be slid along a guide disposed at an inner side surface of the body. ### Claim 15 (depends on 13) The portable terminal of claim 13, wherein the supplementary LCD is a flexible LCD. ### Claim 16 (depends on 13) The portable terminal of claim 13, wherein a strong material having a predetermined size is attached to a rear surface of the supplementary LCD so as to maintain stiffness. ### Claim 17 (depends on 13) The portable terminal of claim 13, wherein the predetermined key is implemented as an entertainment key or a slide button. ### Claim 18 (depends on 13) The portable terminal of claim 13, wherein the entertainment key comprises a film key, a DMB key, a game key, and a navigation key. ### Claim 19 (depends on 13) The portable terminal of claim 13, wherein a sliding degree of the supplementary LCD is set to be different according to a type of an entertainment being executed. ### Claim 20 (depends on 13) The portable terminal of claim 13, wherein the sliding degree of the supplementary LCD is set as a default. ### Claim 21 (depends on 13) The portable terminal of claim 13, wherein when the entertainment key is input, the controller displays an operation mode of the portable terminal on the main LCD if an LCD sliding menu is set as an ‘ON’ state, and automatically slides the supplementary LCD to a vertical direction of the main LCD. ### Claim 22 (depends on 13) The portable terminal of claim 13, wherein the controller restores the supplementary LCD to an initial state when a voice call is received, and displays a video call screen on the main LCD and display a message inquiring whether to restore the supplementary LCD to the initial state when a video call is received. ### Claim 23 (depends on 13) The portable terminal of claim 13, wherein the controller slides the supplementary LCD step by step according to an input frequency of the slide button. ### Claim 24 (depends on 13) The portable terminal of claim 13, wherein the controller restores the supplementary LCD to an initial state in an emergency mode when it has been detected that an acceleration of the portable terminal which is dropping is more than a threshold value.