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:
Oct. 06, 2015
Filed:
Nov. 30, 2011
Tsuyoshi Hirashima, Osaka, JP;
Haruo Yamashita, Osaka, JP;
Takeshi Ito, Osaka, JP;
Abstract
A display device includes a display portion having red, green, blue and white sub pixels, a converter generating red, green and blue conversion signals using a brightness ratio from a ratio storage, an upper limit value calculator calculating an upper limit value of a display brightness of the white sub pixel using the red, green and blue conversion signals and the brightness ratio, a lower limit value calculator calculating a lower limit value of the display brightness of the white sub pixel using the red, green and blue conversion signals and the brightness ratio, and a white control signal generator generating a white output control signal for controlling the display brightness of the white sub pixel such that the display brightness is not more than the upper limit value and not less than the lower limit value, and outputting the generated white output control signal to the display portion.