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Method for displaying an image on an organic light emitting display and respective apparatus

An image-displaying, organic technology used in static indicators, instruments, electrical solid devices, etc.

Inactive Publication Date: 2009-01-07
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So there's no real problem with large areas flickering either

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  • Method for displaying an image on an organic light emitting display and respective apparatus
  • Method for displaying an image on an organic light emitting display and respective apparatus
  • Method for displaying an image on an organic light emitting display and respective apparatus

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Embodiment Construction

[0043] The essential idea of ​​the present invention lies in a new analog subframe distribution. The simulated subframe distribution is based on two groups of subframes having similar duration and located in two field periods as shown in FIG. 8 . This (the solution) results in artificial frequency doubling. Divides the input frame into two equivalent fields, and each field is divided into a certain amount of subframes (two times 6 in this example).

[0044] This is mandatory: subframes SFn and SF'n have similar duration but are not automatically exactly the same. The number of subframes in the two fields can also be different as long as the total duration of the two fields is approximately equal. In addition, the amplitudes of corresponding subframes in the two fields, such as SF0 and SF'0, may be slightly different. This allows more flexibility in picture coding. However, if the duration is exactly the same, the quality in terms of flickering is better. An appropriate co...

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Abstract

The driving of an active matrix organic light emitting display (AMOLED) shall be improved. A pulsing grayscale rendition shall be combined with an improved motion rendition when driving the AMOLED with analog signals. Therefore, there is provided a data signal which is applied to each cell of the AMOLED for displaying a first grayscale level of a pixel of the image during a first group of sub-frames (SFO to SF5) for displaying at least a second grayscale level of a pixel of the image during at least a second group of sub-frames (SF' 0 to SF' 5). The first group of sub-frames (SFO to SF5) and the at least second group of sub-frames (SF' 0 to SF' 5) are constituting a video frame N. Each group of sub-frames is divided into a plurality of sub-frames. Each of the first group of sub-frames and the second group of sub-frames is belonging to a separate complete image of the display (AMOLED). The data signal of a cell comprises plural independent elementary data signals wherein each of the elementary data signals is applied to the cell during a sub-frame and the grayscale level displayed by the cell during the respective group of sub-frames depends on the amplitude of the elementary data signals and the duration of the sub-frames. With this concept, a flicker-free and a very high level motion rendition can be offered.

Description

technical field [0001] The invention relates to a method for displaying images on an active matrix organic light emitting display. Furthermore, the invention relates to a device for displaying an image comprising: an active matrix comprising a plurality of organic light-emitting cells; a row driver for selecting the cells of said active matrix row by row a column driver for receiving data signals to be applied to the cells to display gray scales of image pixels during a video frame; and a digital processing unit for generating the data signals and control signals to control the row driver. Background technique [0002] The structure of active matrix OLEDs or AMOLEDs is well known. According to Figure 1, it includes: [0003] - An active matrix 1 comprising, for each cell, several TFTs T1 , T2 in combination with capacitors C connected to the OLED material. Above the TFT, a capacitor C acts as a memory component that stores a value during a portion of a video frame repres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G2320/0247G09G3/2081G09G2320/0266G09G2300/0809G09G3/2022G09G3/3225G09G2360/02G09G2320/106G09G2310/0229G09G2320/0261H10K59/12
Inventor 塞巴斯蒂安·维特布鲁赫卡洛斯·科雷亚菲利普·勒鲁瓦
Owner THOMSON LICENSING SA
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