Display unit communication system, communication method, display unit, communication circuit, and terminal adapter

A lighting apparatus comprising:

• a control unit providing display data packet to a plurality of display units;
• at least one terminal adaptors assigned terminal adaptor ID and having a terminal adaptor side communication section connected with the control unit electrically via upper communication line;
• and
• the display units assigned display unit ID, having a display unit side communication section connected with the terminal adaptor electrically via lower communication line, and driving at least one of the disposed light emitting elements based on the display data packets provided by the control unit;
• wherein the terminal adaptors and/or the display units are arranged in n rows (n is two or more integer), each of the communication sections being connected each other serially at each of the rows;
• the communication section of the terminal adaptors and/or the display units are connected which is arranged at end position of the lowest stream viewed from the control unit in m-th row (m is integer, which is 1≦m≦n−1) with which is arranged in (m+1)-th row at end position on same side as the communication section of the terminal adaptors and/or the display units is located in m-th row.

A communication method using display data packets in a lighting apparatus which comprises:

• a control unit providing display data packets to a plurality of display units,
• at least one terminal adaptors assigned terminal adaptor ID and connected with the control unit electrically via upper communication line;
• the display unit having display section which drives at least one of disposed light emitting elements based on the display data packets provided by control unit, and a memory which has memory space in accordance with arrangement of the light emitting elements, number of color tones constituting one pixel and gradation number, the display unit being assigned display unit ID, and connected with the terminal adaptor electrically via lower communication line;
• and
• wherein the display data packet further comprises at least identifying information area retaining the terminal adaptor ID and the display unit ID, memory space allotting area allotting memory space of the display units to be input, display data area having display data in accordance with arrangement of the light emitting elements, and number of color tones constituting one pixel and gradation number.

A communication circuit comprising:

• a first communication section having a first transmitting section and a first receiving section;
• a second communication section having a second transmitting section and a second receiving section;
• a communication control section controlling communication at the first communication section and the second communication section;
• receiving processing section performing receiving process based on received communication data;
• wherein the first communication section and the second communication section distinguishes predetermined communication data;
• and
• in case either the first communication section or the second communication section receives the predetermined communication data alternatively, the communication control section controls to input the communication data received by the communication sections receiving the predetermined communication data into the receiving processing section, and to input the communication data into other communication sections so as to input communication data received by other communication sections into the transmitting section of the communication sections receiving the predetermined communication data without inputting it into the receiving processing section.