Apparatus for controlling lighting equipment for lighting communication

• US 8,750,718 B2
• Filed: 02/19/2010
• Issued: 06/10/2014
• Est. Priority Date: 02/19/2009
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd., Chancellor Masters & Scholars of The University of Cambridge (University of Cambridge)
• Original Assignee: Samsung Electronics Co. Ltd., Chancellor Masters & Scholars of The University of Cambridge (University of Cambridge)
• Inventors: Lee, Kyung-Woo, O'Brien, Dominic, Jung, Dae-Kwang
• Primary Examiner(s): Vanderpuye, Ken
• Assistant Examiner(s): Alagheband, Abbas H
• Application Number:
  US12/709,009
• Publication Number:
  US 20100209119A1
• Time in Patent Office: 1,572 Days
• Field of Search: 398/172, 398182-183, 398/118, 372/9, 372/38.02, 372/38.07
• US Class Current: 398/172
• CPC Class Codes: H04B 10/1149 Arrangements for indoor wireless networking of information
• CPC Class Codes: H04B 10/116 Visible light communication

Abstract

Disclosed is an apparatus for controlling an illumination device for optical communication, including an optical array having a plurality of light emitting elements, a visible ray communication unit for outputting an electrical signal for visible ray communication, an optical array driving unit for providing a control signal for individually controlling ON/OFF of the plurality of light emitting elements, and a logic operation unit for performing logic operations on signals provided from the visible ray communication unit and the optical array driving unit, and outputting resultant operated signals to the optical array.

Claims

1. An apparatus for controlling an illumination device for optical communication, the apparatus comprising:

an optical array including a plurality of light emitting elements;

a visible ray communication unit for outputting an electrical signal for visible ray communication;

an optical array driving unit for providing a control signal for individually controlling ON/OFF of the plurality of light emitting elements;

a logic operation unit for performing logic operations on signals provided from the visible ray communication unit and the optical array driving unit, and outputting resultant operated signals to the optical array; and

a gain control unit for controlling a gain of the signal output from the visible ray communication unit,

wherein the optical array driving unit provides the control signal for controlling at least two light emitting elements to be in an ON state within a same time slot, and

wherein the gain control unit is provided between the visible ray communication unit and the logic operation unit.

2. The apparatus as claimed in claim 1, wherein the optical array driving unit controls the plurality of light emitting elements into ON states in different time slots.

3. The apparatus as claimed in claim 1, wherein the logic operation unit comprises a plurality of logic elements connected to the plurality of light emitting elements, respectively,

wherein the logic elements include common input terminals for receiving input of the electrical signal from the visible ray communication unit, and individual input terminals for receiving inputs of control signals individually provided from the optical array driving unit, respectively.

4. The apparatus as claimed in claim 3, wherein the logic elements perform AND operations on signals input via the common input terminals and the individual input terminals, and output resultant operated signals.

5. The apparatus as claimed in claim 1, wherein the optical array driving unit outputs the control signal for controlling each light emitting element to keep the ON state in at least two consecutive time slots.