# US 10,320,480 B2 · Mobile terminal having guiding member for guiding a direction of visible light emitted from a light source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,320,480 B2 - Document ID: US10320480B2 - Status: Granted - Kind: B2 - Application number: 15/749,082 - Filed: 2015-08-12 - Published: 2018-08-09 - Granted: 2019-06-11 - Earliest claimed: 2015-08-12 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Hongjo Shim; Gukchan Lim; Seonghyok Kim - Web page: https://patentgrep.com/patent/US10320480B2 ## CPC - H04B 10/116: Visible light communication - G01J 1/0219: {Electrical interface; User interface} - G01J 1/0233: {Handheld} - G01J 1/0271: {Housings; Attachments or accessories for photometers} - G01J 1/4204: {with determination of ambient light (solar light G01J2001/4266)} - G01J 1/44: Electric circuits {(for command of an exposure part G03B7/02)} - H04B 1/38: Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving - H04M 1/737: Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves - H04N 23/60: Control of cameras or camera modules - G01J 2001/446: {Photodiode} - H04M 1/22: Illumination; Arrangements for improving the visibility of characters on dials - H04M 1/72412: using two-way short-range wireless interfaces - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H04B: TRANSMISSION - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A structure of a mobile terminal for visible light communication is disclosed. The mobile terminal, according to one embodiment of the present invention, comprises: a light reception unit for receiving visible light; and a control unit for extracting, from the received visible light, data corresponding to the turning on/off of an external lighting, wherein the light reception unit comprises at least one among an illuminance sensor, a first image sensor disposed on the front of the mobile terminal, and a second image sensor disposed on the back of the mobile terminal, and comprises a guide member for guiding the traveling direction of visible light outputted from the lighting. ## Claims ### Claim 1 A mobile terminal for performing visible light communication using visible light emitted from a light source, which is turned on/off according to a predetermined condition, the mobile terminal comprising: a light receiving unit configured to receive visible light; and a controller configured to extract data corresponding to ON/OFF of the light source from the received visible light, wherein the light receiving unit comprises at least one of an illumination sensor, a first image sensor disposed on a front surface of the mobile terminal, or a second image sensor disposed on a rear surface of the mobile terminal, wherein the light receiving unit further comprises a guide member for guiding a direction of the visible light emitted from the light source, wherein the guide member is disposed such that the guide member faces the at least one of the illumination sensor, the first image sensor, or the second image sensor, wherein the guide member is shaped to form a penetration hole that allows the visible light emitted from the light source to pass therethrough, and wherein the guide member comprises a plurality of layered sheets, and wherein a convex lens unit is formed on a surface of each of the sheets. ### Claim 2 (depends on 1) The mobile terminal of claim 1, wherein the guide member comprises a refraction unit for refracting the visible light emitted from the light source by a predetermined degree, and wherein the visible light refracted by the refraction unit is received by the at least one of the illumination sensor, the first image sensor, or the second image sensor. ### Claim 3 (depends on 2) The mobile terminal of claim 2, wherein the refraction unit is disposed separately from the illumination sensor, the first image sensor, and the second image sensor. ### Claim 4 (depends on 2) The mobile terminal of claim 2, wherein when the light receiving unit comprises the illumination sensor, the illumination sensor is disposed such that a front surface of the illumination sensor is perpendicular to the front surface of the mobile terminal. ### Claim 5 (depends on 1) The mobile terminal of claim 1, wherein when the light receiving unit comprises the illumination sensor and the first image sensor, the illumination sensor is configured to receive visible light from a first external light source, and the first image sensor is configured to receive visible light from a second external light source. ### Claim 6 (depends on 5) The mobile terminal of claim 5, wherein the guide member comprises a refraction unit for refracting the visible light emitted from the light source by a predetermined degree, and wherein the visible light from the first light source passes through the refraction unit and then is received by the illumination sensor. ### Claim 7 (depends on 5) The mobile terminal of claim 5, wherein the guide member comprises a refraction unit for refracting the visible light emitted from the light source by a predetermined degree, and wherein the visible light from the second light source passes through the refraction unit and then is received by the first image sensor. ### Claim 8 A mobile terminal for performing visible light communication using visible light emitted from a light source, which is turned on/off according to a predetermined condition, the mobile terminal comprising: a light receiving unit configured to receive visible light; and a controller configured to extract data corresponding to QN/QFF of the light source from the received visible light, wherein the light receiving unit comprises at least one of an illumination sensor, a first image sensor disposed on a front surface of the mobile terminal, or a second image sensor disposed on a rear surface of the mobile terminal, wherein the light receiving unit further comprises a guide member for guiding a direction of the visible light emitted from the light source, wherein the illumination sensor comprises a plurality of photodiodes, wherein the guide member comprises a penetration hole corresponding to each of the plurality of photodiodes, and wherein the guide member comprises a plurality of layered sheets, and wherein a convex lens unit is formed on a surface of each of the sheets. ### Claim 9 (depends on 8) The mobile terminal of claim 8, wherein a first photodiode among the plurality of photodiodes is configured to receive visible light from a first external light source, and a second photodiode among the plurality of photodiodes is configured to receive visible light from a second external light source. ### Claim 10 (depends on 1) The mobile terminal of claim 1, wherein when the light receiving unit comprises the first image sensor and the second image sensor, the first image sensor is configured to receive visible light from a first external light source, and the second image sensor is configured to receive visible light from a second external light source. ### Claim 11 (depends on 1) The mobile terminal of claim 1, wherein when the light receiving unit comprises the illumination sensor and the second image sensor, the illumination sensor is configured to receive visible light from a first external light source, and the second image sensor is configured to receive visible light from a second external light source. ### Claim 12 (depends on 1) The mobile terminal of claim 1, wherein the light receiving unit comprises the illumination sensor comprising a first photodiode and a second photodiode, and wherein the first and second photodiodes are disposed apart from each other by a predetermined distance. ### Claim 13 (depends on 12) The mobile terminal of claim 12, wherein the first and second photodiodes are configured to receive visible light from an identical light source, and wherein data extracted from the first photodiode is identical to data extracted from the second photodiode. ### Claim 14 (depends on 12) The mobile terminal of claim 12, wherein a field of view (FOV) of the first photodiode is different from an FOV of the second photodiode, and wherein focus of the first photodiode is matched with focus of the second photodiode in the state in which the first and second photodiodes are apart from each other by the predetermined distance. ### Claim 15 (depends on 12) The mobile terminal of claim 12, further comprising: a display unit; and a wireless communication unit, wherein the controller is further configured to: cause the display unit to display data extracted from visible light received by the first photodiode; and cause the wireless communication unit to transmit data extracted from visible light received by the second photodiode to an external device. ### Claim 16 A mobile terminal for performing visible light communication using visible light emitted from a light source, which is turned on/off according to a predetermined condition, the mobile terminal comprising: a light receiving unit configured to receive visible light; and a controller configured to extract data corresponding to QN/QFF of the light source from the received visible light, wherein the light receiving unit comprises at least one of an illumination sensor, a first image sensor disposed on a front surface of the mobile terminal, or a second image sensor disposed on a rear surface of the mobile terminal, wherein the light receiving unit further comprises a guide member for guiding a direction of the visible light emitted from the light source, wherein a convex lens unit is formed on a surface of the guide member, and wherein the guide member comprises a plurality of layered sheets, and wherein the convex lens unit is formed on a surface of each of the sheets. ### Claim 17 (depends on 16) The mobile terminal of claim 16, wherein the convex lens unit is disposed such that the convex lens unit faces the illumination sensor.