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:
Jan. 27, 2009
Filed:
Jun. 09, 2004
Masashi Nogawa, Tokyo, JP;
Masashi Nogawa, Tokyo, JP;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
The objective of this invention is to provide a drive circuit and display system that can efficiently transfer prescribed information indicating an abnormality in the drive current supplied to the display elements to a control device. The control data used for controlling the turning on and off of LEDs are shifted sequentially from the first section to the final section of LED drivers---K connected in cascade. In the drive circuit of each section, the control data input from the previous section are held in the first data holding means synchronously with clock signal CLK. Then, the data held in the first data holding means are held in the second data holding means synchronously with latch signal XLAT. Current corresponding to the control data of the second data holding means is supplied to LEDs---M. On the other hand, when new control data are held in the second data holding means, the data indicating prescribed information concerning abnormal functioning of the LED, etc. are held in the first data holding means. The data are output sequentially from the drive circuit in the final section and are input into control device