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Device and method for attenuating brightness of plasma screen

A technology of brightness and attenuation constant, which is applied in the field of PDP brightness attenuation devices, and can solve the problems of reducing the high brightness level of a small area and not effectively affecting the average brightness level of a frame.

Inactive Publication Date: 2005-09-21
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when a region has a high brightness level, but is too small to effectively affect the average brightness level of the frame, the high brightness level of a small region cannot be reduced satisfactorily

Method used

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  • Device and method for attenuating brightness of plasma screen
  • Device and method for attenuating brightness of plasma screen
  • Device and method for attenuating brightness of plasma screen

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Embodiment Construction

[0021] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] refer to image 3 , the brightness attenuation device according to the preferred embodiment of the present invention includes a motion detection unit 310 , a duration (duration) checking unit 320 , an attenuation constant generator 330 and a level attenuation unit 340 .

[0023] The motion detection unit 310 includes a memory 311, an adder 312, and a comparator 313, and detects a portion containing no motion from a current input frame.

[0024] More specifically, the memory 311 stores one frame of data composed of RGB data having linear characteristics. The adder 312 detects a difference between currently input RGB data and RGB data output from the memory 311 . The RGB data output from the memory 311 is the RGB data of the previous frame. Motion detection can be performed in units of pixels or blocks of size N×N. When motion detectio...

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Abstract

The present invention provides an apparatus and method for attenuating luminance of a plasma display panel (PDP) to prevent degradation of picture quality on a local area and an increase in power consumption. The apparatus includes a motion detection unit for detecting whether input data has motion, a duration check unit for checking a duration time for which the input data has no motion when the input data is detected as having no motion in the motion detection unit, an attenuation constant generator for generating an attenuation constant corresponding to a luminance level of the input data when the input data continuously has no motion for at least a predetermined period of time, and a level attenuation unit for attenuating the luminance level of the input data using the attenuation constant generated from the attenuation constant generator. Accordingly, degradation of picture quality on a local area, which does not influence an average luminance level for a frame, and an increase in power consumption due to the degradation can be prevented.

Description

technical field [0001] The present invention relates to a device and method for attenuating the brightness of a plasma display panel (plasma display panel, PDP), in particular to a device and method for attenuating the brightness of a PDP that can prevent image quality degradation and reduce power consumption . Background technique [0002] PDP uses a time-sharing method to display gray levels. In other words, a single frame is divided into a plurality of subfields, and a light emission period (or sustain discharge period) is adjusted for each subfield to display gray scales. When a video signal having a high luminance component is continuously displayed on the PDP, the picture quality degrades, shortens the life of the PDP, and also increases power consumption. [0003] In order to prolong the life of the panel and reduce the power consumption, PDPs are conventionally provided with a device for automatically attenuating the brightness level of an image according to the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/02G06T13/00G06T15/70G09G3/20G09G3/28H04N5/66
CPCG09G3/2007G09G2320/0626G09G2320/0285G09G2320/103G09G2330/021G09G3/28G09G2360/16G09G3/296
Inventor 刘孝男
Owner SAMSUNG ELECTRONICS CO LTD