The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2018
Filed:
Mar. 10, 2014
Xi'an Novastar Tech Co., Ltd., Xi'an, CN;
Shengchun Yuan, Xi'an, CN;
Jingguo Zong, Xi'an, CN;
Huorong Wang, Xi'an, CN;
Guanghui Fan, Xi'an, CN;
XI'AN NOVASTAR TECH CO., LTD., Xi'an, CN;
Abstract
The present invention provides a LED display unit board, a LED display screen control card and a LED display screen system. In the LED display screen control card, an output circuit transmits data and control signals to an input-output interface to drive and control a LED display unit board(s); a data return circuit transmits return data generated from the LED display unit board(s) which represents a test result of the LED display unit board(s) to a main control circuit. The present invention disposes the data return circuit on the control card which can be used together with the LED display unit board(s) each having a data return circuit. Therefore there is no need of an additional monitoring board for building a circuit loop to perform fault detection of the LED display unit board(s), simplified connection and lower cost can be achieved.