US 8,134,528 B2Granted

Driving method of liquid crystal display apparatus, driving apparatus of liquid crystal display apparatus, and program thereof

AssigneeSharp Kabushiki Kaisha

InventorsMakoto Shiomi, Kazunari Tomizawa, Koichi Miyachi, Tomoo Furukawa

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Abstract

A liquid crystal display apparatus includes a plurality of areas in which response speeds greatly different from each other coexist in a pixel. A first replacement process section replaces the image data of the desired target frame with a first gradation, when a gradation transition from a current frame to a desired target frame corresponds to the above gradation transition. A second replacement process section replaces the image data of the current frame with a second value. The first value is set to a value causing the pixel to respond at a relatively higher speed without the occurrence of the excessive brightness. Without avoiding the deterioration of the image, it is possible to drive a liquid crystal display apparatus including areas whose response speeds are different from each other coexist in the pixel, such as a liquid crystal display apparatus of vertically aligned mode and normally black mode.

Claims16

Dependent claims

A driving apparatus of a liquid crystal display apparatus including a liquid crystal cell of a vertically aligned mode driven in a normally black mode, said driving apparatus comprising:

correction means for correcting a desired target gradation so as to facilitate a gradation transition from a current gradation to the desired target gradation;
judgment means for judging whether or not a combination of the current gradation and the desired target gradation corresponds to a predetermined first combination which causes a time required for a gradation in a second area of a pixel to reach a second target gradation to become not less than a predetermined second tolerance, when facilitating the gradation transition to such a degree that a gradation in a first area of the pixel does not exceed a predetermined first tolerance indicative of a first target gradation, and which causes the gradation in the second area of the pixel to exceed the first tolerance, when facilitating the gradation transition to such a degree that a time required for the gradation in the first area of the pixel to reach the first target gradation becomes less than the second tolerance;
first calculation means for adding a predetermined first value to the desired target gradation, when the combination of the current gradation and the desired target gradation corresponds to the first combination, and for supplying an added result to said correction means;
and
second calculation means for subtracting a predetermined second value from the current gradation, when a combination of the current gradation and a previous gradation corresponds to the first combination, and for supplying a subtracted result to said correction means.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/071,550Filed 22 Feb 2008 · division
Priority: JP 2003-07599219 Mar 2003
Published: US 2008/0211756 A14 Sep 2008
Granted: 13 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G09G 3/3648
Control of matrices with row and column drivers: using an active matrix
G09G 3/2007
For presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged…:…
G09G 2310/0224
Addressing, scanning or driving the display screen or processing steps related thereto: details of interlacing
G09G 2320/0252
Improving the quality of display appearance: improving the response speed

Family

Application10/804,027Parent of this division · filed 19 Mar 2004
US 2008/0211756 A1Pre-grant publication · published 4 Sep 2008
US 7,358,948 B2Parent of this division
US 2005/0024310 A1Published application
US 8,134,528 B2This patent

From the US filing history. Foreign family members aren’t listed.