Display apparatus and display driving method for effectively eliminating the occurrence of a moving image false contour
a technology of display apparatus and false contour, which is applied in the direction of instruments, television systems, static indicating devices, etc., can solve problems such as degrading picture quality
Inactive Publication Date: 2008-01-17
FUJITSU HITACHI PLASMA DISPLAY LTD
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- Application Information
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Benefits of technology
The solution effectively eliminates moving image false contours without substantial cost increases, enhancing picture quality by selectively processing images through either the main or sub path based on the likelihood of contour occurrence.
Problems solved by technology
In particular, when a person in a displayed image moves, a green or red color band occurs, for example, on the contour of the person's face or other flesh-colored portions, and this greatly degrades the picture quality.
Method used
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[0045] Before proceeding to the detailed description of the preferred embodiments of the present invention, the prior art display apparatuses and display driving methods and their associated problems will be described with reference to the drawings.
[0046]FIG. 1 is a block diagram schematically showing one example of a plasma display apparatus. In FIG. 1, reference numeral 1 is an image processing circuit, 2 is an light emission time control circuit, 3 is a PDP driving circuit, and 4 is a PDP For convenience of illustration, in FIG. 1 the PDP 4 is shown inside the PDP driving circuit 3.
[0047] As shown in FIG. 1t the plasma display apparatus comprises: the image processing circuit 1 which processes image signals of R, G, and B colors; the light emission time control circuit 2 which controls the light emission time for light emission in the PDP 4 in accordance with output signals of the image processing circuit 1; and the PDP driving circuit 3 which drives the PDP 4 in accordance wit...
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A display apparatus displaying gray scale by using a subfield method has a main path, a sub path, a switch circuit, a motion region detection circuit, a first judging circuit, a level detection circuit, a motion detection correction circuit, and a second judging circuit. The switch circuit outputs a first image signal generated by the main path or a second image signal generated by the sub path by switching therebetween, and the first judging circuit outputs a first motion signal in accordance with an output of the motion region detection circuit. The motion detection correction circuit receives the first motion signal and a level signal, and outputs a second motion signal in accordance with the level signal, and the second judging circuit receives the second motion signal and the level signal, and outputs a switching control signal to the switch circuit.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is Divisional Application of U.S. Ser. No. 10 / 800,774, filed Mar. 16, 2004, now allowed, and claims the benefit of priority from the prior Japanese Patent Application No. 2003-188075, filed on Jun. 30, 2003, the entire contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a display apparatus and a display driving method and, more particularly, to a display apparatus and a display driving method suitable for driving a plasma display panel (PDP). [0004] 2. Description of the Related Art [0005] With the recent trend toward larger-screen displays, the need for thin display apparatuses has been increasing, and various types of thin display apparatus have been commercially implemented. Examples include matrix panels that display images by directly using digital signals, such as PDPs and other gas discharge display panels, dig...
Claims
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IPC IPC(8): G09G5/10H04N5/66G09G3/20G09G3/28G09G3/291G09G3/294H04N5/14
CPCG09G3/2022G09G3/28G09G2320/0261H04N5/145G09G2320/0271G09G2320/106G09G2320/0266G09G3/2059G09G3/2803
Inventor OHTA, SHUNJITAKEUCHI, MASANORICHIAKI, YUTAKATAJIMA, MASAYAYAMAMOTO, AKIRA
Owner FUJITSU HITACHI PLASMA DISPLAY LTD