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:
May. 02, 1995
Filed:
Jun. 01, 1992
Hiroshi Maeda, Yamatokooriyama, JP;
Takuro Omori, Ikoma, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A frame thinning out system has been used as a display driving method for making a gradational display with several brightness levels on the screen of a liquid crystal display device and the like. This display driving method creates a gradational display by setting a plurality of frame time periods, during which each of a plurality of pixels on the screen of the display device is controlled for displaying an image, as one integration time period. The pixels are turned on for only a number of specified frame time periods corresponding to a brightness level to be displayed. All pixels of the display device are grouped into multiple groups composed of a plurality of pixels contiguous to each other. The number of pixels to be turned on in each frame time period is selected corresponding to the specified gradation data within the same group. Thus, the number of pixels to be turned on for one frame time period may be equal between subgroups in the scanning lines within the same group. The frame time period during which the number of pixels turned on is kept constant is set such that a human being does not sense flicker. Thus, a gradational display without noticeable flicker can be obtained. Since no delicate shades of brightness occur among pixels to the same gradation level, quality of the display is improved.