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Method of performing image-adaptive tone mapping and display device employing same

A tone-mapping, adaptive technology used in cathode ray tube indicators, static indicators, instruments, etc. to solve problems such as flicker and image quality degradation

Active Publication Date: 2019-09-13
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, since tone mapping is performed by applying a tone mapping curve having a large difference to image frames realizing a similar image, the difference in brightness (or brightness) between image frames on the display panel will be large, and the brightness Poor results in flicker that can be observed (or recognized) by the user (or observer)
Therefore, image quality will be considerably degraded in conventional display devices employing this tone mapping technique

Method used

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  • Method of performing image-adaptive tone mapping and display device employing same
  • Method of performing image-adaptive tone mapping and display device employing same
  • Method of performing image-adaptive tone mapping and display device employing same

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Embodiment Construction

[0046] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various exemplary embodiments. It is evident, however, that the various exemplary embodiments may be practiced without these specific details, or with one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0047] Unless otherwise stated, the illustrated exemplary embodiments are to be understood as exemplary features providing various details of some exemplary embodiments. Accordingly, t...

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Abstract

The disclosure relates to a method of performing image-adaptive tone mapping and a display device employing the same. The method includes: determining a tone mapping curve based on a data signal corresponding to an image frame to be displayed on a display panel; determining whether a scene change occurs between the image frame and a previous image frame by comparing the data signal with a previousdata signal corresponding to the previous image frame; generating, in response to a determination that the scene change does not occur, a final tone mapping curve based on the tone mapping curve anda previous tone mapping curve, which is applied to the previous image frame; determining, in response to a determination that the scene change occurs, the tone mapping curve as the final tone mappingcurve; and performing a tone mapping by applying the final tone mapping curve to the image frame.

Description

technical field [0001] Exemplary embodiments relate generally to display devices, and more particularly to a method of performing image-adaptive tonemapping for improving the contrast of an image frame by performing tone-mapping on the image frame and a method for performing image-adaptive tonemapping. A method of tone-mapping a display device. Background technique [0002] The display device can improve the contrast of the image frame and improve the image quality by performing tone mapping on the image frame. For example, the display device can convert the RGB signal corresponding to the image frame to be displayed through the display panel into the YCbCr signal, convert the YCbCr signal into the Y'Cb'Cr' signal based on the tone mapping curve, convert the Y'Cb'Cr' signal Converting to and displaying image frames based on the R'G'B' signal and performing tone mapping on the image frame. For this purpose, the display device usually determines a tone mapping curve for each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208G09G3/36
CPCG09G3/3208G09G3/3607G09G2320/0271G09G2320/0626G09G3/2007G09G2320/0247G09G2320/066G09G2320/103G09G2340/06G09G3/2003G09G5/02G09G2340/16G09G2320/0686
Inventor 申智惠朴胜虎金仙幸
Owner SAMSUNG DISPLAY CO LTD