US 11,695,481 B2
Light intensity signal transmitting device based on high-speed LED array
Mingjie Sun, Beijing (CN); Han Wang, Beijing (CN); Kuijun Li, Beijing (CN); Hongxu Huang, Beijing (CN); Wen Chen, Beijing (CN); and Lijing Li, Beijing (CN)
Assigned to BEIHANG UNIVERSITY, Beijing (CN)
Filed by Beihang University, Beijing (CN)
Filed on Mar. 8, 2022, as Appl. No. 17/689,231.
Claims priority of application No. 202110256513.9 (CN), filed on Mar. 9, 2021.
Prior Publication US 2022/0294533 A1, Sep. 15, 2022
Int. Cl. H04B 10/50 (2013.01); F21V 23/00 (2015.01); H04B 10/116 (2013.01); H04B 10/69 (2013.01); F21Y 105/18 (2016.01); F21Y 115/10 (2016.01)
CPC H04B 10/502 (2013.01) [F21V 23/002 (2013.01); H04B 10/116 (2013.01); H04B 10/69 (2013.01); F21Y 2105/18 (2016.08); F21Y 2115/10 (2016.08)] 5 Claims
OG exemplary drawing
 
1. A light intensity signal transmitting device based on an LED array, comprising the LED array and a control board card, wherein
a transmission signal is pre-coded and then stored in a memory of the control board card as a pre-coded transmission signal, the LED array is connected with the control board card, the control board card outputs a control signal to a row control end and a column control end of the LED array, to output, in a one-time scanning mode, a pattern corresponding to the pre-coded transmission signal, thereby implementing transmission through light signals;
a photodetector receives information transmitted by the LED array, when a number of LEDs in the LED array is 2n, any n-bit binary data from 0 to 2n LEDs can be transmitted, and signals output by the photodetector pass through an analog-to-digital converter to recognize a number of lightened LEDs, thereby realizing data transmission,
wherein the LED array is controlled by row control lines and column control lines in a gating mode, a number of LEDs required to be lightened in the LED array is controlled in the one-time scanning mode, and response time of the LED array is equal to response time of a single LED,
in an arrangement mode of the LED array, when a row with a largest number of LEDs with anodes connected together or LEDs with cathodes connected together is a central row, a number of LEDs with anodes connected together of LEDs with cathodes connected together in each row of other rows is gradually decreased to one towards an edge; and
when a column with a largest number of LEDs with anodes connected together or LEDs with cathodes connected together is a central column, a number of LEDs with anodes connected together or LEDs with cathodes connected together in each column of other columns is gradually decreased to one towards an edge.