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Image display apparatus and image display method

An image display device and image technology, applied to static indicators, instruments, etc., can solve problems such as complex circuit composition

Inactive Publication Date: 2008-08-06
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned moving image display method and the block comparison method in the moving image display device need to detect the motion vector by obtaining the correlation between the block to be detected and a plurality of candidate blocks prepared in advance, and thus require many lines. Memory and computing circuits, the circuit composition is complex

Method used

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  • Image display apparatus and image display method
  • Image display apparatus and image display method

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Embodiment approach 1

[0064] FIG. 1 shows the overall composition of an image display device according to Embodiment 1 of the present invention.

[0065] The image display device 100 of FIG. 1 includes a video signal processing circuit 101, an A / D (analog-digital) conversion circuit 102, a field delay circuit 103, a brightness signal generation circuit 104, brightness gradient detection circuits 105 and 106, and an activity detection circuit 107. , image data processing circuit 108, subfield processing circuit 109, data driver 110, scan driver 120, sustain driver 130, plasma display panel (hereinafter abbreviated as PDP) 140 and timing pulse generating circuit (not shown).

[0066] PDP 140 includes multiple data electrodes 50 , multiple scan electrodes 60 and multiple sustain electrodes 70 . Multiple data electrodes 50 are arranged in the vertical direction of the screen, and multiple scan electrodes 60 and multiple sustain electrodes 70 are arranged in the horizontal direction of the screen. A pl...

Embodiment approach 2

[0159] Next, an image display device according to Embodiment 2 will be described.

[0160] FIG. 13 is a diagram showing the configuration of an image display device according to Embodiment 2. FIG. The configuration of the image display device 100 a of Embodiment 2 is different from that of the image display device 100 of Embodiment 1 as follows.

[0161] The image display device 100a shown in FIG. 13 has a red signal circuit 120R, a green signal circuit 120G, a blue signal circuit 120B, a red signal image data processing circuit (hereinafter referred to as a red image data processing circuit) 121R, a green signal image data processing circuit ( Hereinafter referred to as a green image data processing circuit) 121G and a blue signal image data processing circuit (hereinafter referred to as a blue image data processing circuit) 121B in place of the luminance signal generation circuit 104 and the luminance gradation detection circuit of the image display device 100 of FIG. 1 105...

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Abstract

In an image display apparatus, a video signal is divided for each field into a plurality of sub-fields, each of which is weighted according to the duration of time or number of pulses. The plurality of sub-fields are temporally superimposed for display, so that a grayscale representation is provided. A video signal for the current field is delayed by one field, and output as a video signal for the previous field. Based on the video signal for the current field and the video signal for the previous field, a luminance gradient of an image is detected. A difference between the video signal for the current field and the video signal for the previous field is calculated. Based on the calculated difference and the detected gradient, the amount of motion of the image is calculated by a detecting circuit. Based on the calculated amount of motion of the image, dynamic false contours are reduced by an image data processing circuit.

Description

technical field [0001] The present invention relates to an image display device and an image display method that display a video signal as an image. Background technique [0002] In response to demand for larger image display devices in recent years, thin matrix panels such as PDP (Plasma Display Panel), EL (Electroluminescence) display elements, fluorescent display tubes, and liquid crystal display elements have begun to be provided. Among such thin image display devices, PDPs are particularly promising as large-screen, direct-view image display devices. [0003] As a PDP halftone display method, there is an intra-field time-division method called a subfield method. In this intra-field time division method, one field is composed of a plurality of screens (hereinafter referred to as subfields) having different luminance weights. The intermediate grayscale display method based on the subfield method is superior in that it can express multiple grayscales even in a binary ima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
Inventor 川村秀昭寺井晴子浅野纯太笠原光弘
Owner PANASONIC CORP