# US 2014/0198038 A1 · Display device, control method, and program > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198038 A1 - Document ID: US20140198038A1 - Status: Published application - Kind: A1 - Application number: 14/240,344 - Filed: 2012-08-22 - Published: 2014-07-17 - Earliest claimed: 2011-08-29 - Assignees: NEC Casio Mobile Communications, Ltd. - Inventors: Ayumu Yagihashi; Seiji Sugahara - Web page: https://patentgrep.com/patent/US20140198038A1 ## CPC - G09G 5/003: {Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto (specific for a CRT G09G1/165; for a flat panel G09G3/2092)} - G06F 3/1423: {controlling a plurality of local displays, e.g. CRT and flat panel display} - G06F 3/1431: {using a single graphics controller} - H04M 1/72448: with means for adapting the functionality of the device according to specific conditions - G09G 2330/021: Power management, e.g. power saving - G09G 2360/04: Display device controller operating with a plurality of display units - H04M 2250/16: including more than one display unit - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A display device includes a plurality of displays provided on different surfaces of a body of the display device; a stationary state determination unit that determines whether or not the body is in a stationary state; a visibility determination unit that determines which of the displays is visible to a user if it is determined by the stationary state determination unit that the body is in a stationary state; and a display control unit that displays predetermined display information on at least the display that is determined by the visibility determination unit to be visible. ## Claims ### Claim 1 A display device comprising: a plurality of displays provided on different surfaces of a body of the display device; a stationary state determination unit that determines whether or not the body is in a stationary state; a visibility determination unit that determines which of the displays is visible to a user if it is determined by the stationary state determination unit that the body is in a stationary state; and a display control unit that displays predetermined display information on at least the display that is determined by the visibility determination unit to be visible. ### Claim 2 (depends on 1) The display device in accordance with claim 1, further comprising: an announcement acquisition unit that acquires announcement information from an external device, wherein the display control unit displays the announcement information acquired by the announcement acquisition unit on the display that is determined by the visibility determination unit to be visible. ### Claim 3 (depends on 1) The display device in accordance with claim 1, further comprising: a supplied power control unit that reduces electric power supplied to the display that is determined by the visibility determination unit to be non-visible. ### Claim 4 (depends on 1) The display device in accordance with claim 1, further comprising: an acceleration sensor that measures an acceleration applied to the body, wherein the stationary state determination unit determines that the body is in a stationary state if a state in which there is no variation in the acceleration measured by the acceleration sensor has continued for a predetermined time. ### Claim 5 (depends on 4) The display device in accordance with claim 4, wherein: the visibility determination unit determines one of the surfaces of the body, which faces a direction toward which the acceleration is detected by the acceleration sensor, is not visible to the user. ### Claim 6 (depends on 4) The display device in accordance with claim 4, further comprising: illuminance sensors that are arranged on the respective surfaces on which the displays are provided, where the illuminance sensors each measure an intensity of light emit into the relevant surface on which the corresponding illuminance sensor is arranged, wherein it is determined that one of the surfaces of the body, which has an illuminance greater than or equal to a predetermined threshold, is determined to be visible to the user, where the illuminance is measured by the corresponding illuminance sensor. ### Claim 7 A control method of a display device that has a plurality of displays provided on different surfaces of a body of the display device, wherein: a stationary state determination unit determines whether or not the body is in a stationary state; a visibility determination unit determines which of the displays is visible to a user if it is determined by the stationary state determination unit that the body is in a stationary state; and a display control unit displays predetermined display information on at least the display that is determined by the visibility determination unit to be visible. ### Claim 8 A non-transitory computer-readable storage medium which stores a program that makes a display device, which has a plurality of displays provided on different surfaces of a body of the display device, function as: a stationary state determination unit determines whether or not the body is in a stationary state; a visibility determination unit determines which of the displays is visible to a user if it is determined by the stationary state determination unit that the body is in a stationary state; and a display control unit displays predetermined display information on at least the display that is determined by the visibility determination unit to be visible.