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Method for controlling light emission of a matrix display in a display period and apparatus for carrying out the method

A technology for control devices and matrix displays, applied to static indicators, parts of color TVs, parts of TV systems, etc., can solve problems such as clearing time, flashing pixels, wrong erasing, etc.

Inactive Publication Date: 2006-04-05
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To improve the situation, the first approach is to simply reduce the seek time through faster seek but this will have a negative impact on the display response fidelity
Likewise, the reduction in clearing time can produce false erasures of flashing pixels that appear in black screens

Method used

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  • Method for controlling light emission of a matrix display in a display period and apparatus for carrying out the method
  • Method for controlling light emission of a matrix display in a display period and apparatus for carrying out the method
  • Method for controlling light emission of a matrix display in a display period and apparatus for carrying out the method

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Embodiment Construction

[0040] exist figure 2 The general principle of light generation in a plasma display is shown in . As mentioned above, a plasma cell is simply switched on or off. Thus, light generation is achieved in small pulses when a plasma cell is switched on. The different colors are produced by modulation - the number of small pulses during each frame. To do this, a frame period is subdivided into sub-frames called sub-frames SF. Each sub-frame SF has been assigned a certain weight which determines how many light pulses are generated in this sub-frame SF. Light generation is controlled by sub-frame code words. The sub-frame code word is a binary number that controls sub-frame activation and deactivation. Each bit is set to 1 to activate the corresponding sub-frame SF. Each bit set to 0 deactivates the corresponding sub-frame SF. The specified number of light pulses will be generated in an active sub-frame SF. In an inactive sub-frame there will be no light generation.

[0041] ...

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Abstract

The invention is related to an improved addressing scheme for plasma display panel control. In the conventional addressing scheme, the whole panel is treated as one section. This has the drawback that a long time distance is between writing a cell during addressing phase and light generation during the sustaining period. An improved addressing scheme has been proposed, where the panel is partitioned in a number of sections and correspondingly the addressing period is split up in corresponding small addressing periods for each section. Inbetween the small addressing periods there is some light generation, so that the time distance between addressing and light emission is substantially reduced. The proposal according to the invention further improves this addressing scheme by varying the time distance between the successive addressing periods of the sections from one sub-field to the other, at least for the sub-fields with higher weights. This leads to a better spread of the energy input and output of the plasma display panel, thus making it possible to use a power supply circuit with less expensive components.

Description

technical field [0001] The present invention relates to a method for controlling the light emission of a plasma matrix display during display and to a device for implementing such a method. [0002] In particular the invention is closely related to a new addressing principle for matrix displays in which the emission / reflection of light is controlled by using small pulses in the form of pulse width modulation for different gray levels of the pixels / propagation generated. Such a principle is used in plasma display panels (PDPs) or other display elements in which the pixel values ​​control the generation of a corresponding number of small light pulses on the display. Background technique [0003] Plasma technology now makes it possible to obtain flat color displays of large size (beyond the limitations of cathode ray tubes CRTs) and have very limited thickness without any viewing angle constraints. [0004] With regard to the latest generation of European television (TV), mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/28H04N5/66G09G3/20
CPCG09G3/28G09G2310/0221G09G3/2007G09G2310/0218G09G2310/0216G09G3/2803G09G3/297G09G3/296
Inventor 塞巴斯蒂安·魏特布鲁赫卡洛斯·科尔里赖纳·茨温
Owner THOMSON LICENSING SA