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Video data signal correction

A display device and active matrix technology, applied in the field of addressing active matrix electroluminescence display devices, can solve the problems of expensive, complex manufacturing process, reducing aperture and the like

Inactive Publication Date: 2008-11-26
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This usually requires adding multiple components, including more TFTs, to the basic pixel circuitry, resulting in a more expensive and complex manufacturing process and an array of pixels with a reduced aperture

Method used

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  • Video data signal correction
  • Video data signal correction
  • Video data signal correction

Examples

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Embodiment Construction

[0050] The method of the present invention can be used in figure 1 with 2 It is implemented in an active matrix electroluminescent display device having a typical arrangement of pixels and addressing circuitry shown and described above with respect to known devices. In short, the power supply line 10 is configured to supply current to n electroluminescence display elements 11 . In the example shown, each row of pixels 1 shares a common power supply line 10 . Each pixel 1 includes an electroluminescence display element 11 and a drive transistor 20 . The current supplied to each display element 11 can be controlled by the drive transistor 20 . figure 2 It is shown that the current load terminal of the drive transistor is connected between the associated power supply line 10 and the anode of the LED display element 11 . However, other configurations are possible which allow the drive transistor to perform virtually the same function.

[0051] Each drive transistor is addres...

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Abstract

A video signal distribution system contains a video stream source (10) that produces a data stream with an encrypted video signal, control word information for decrypting the video signal and fee information indicative of fees for viewing respective parts of the video signal. A plurality of video reproduction apparatuses (12) are coupled to a medium (14) to receive the data stream. Each of the video reproduction apparatuses (12) comprises a control word derivation unit (125) for supplying control words derived from the control word information to a video signal decryption device (121). A credit management unit with a credit memory (128) is provided, which enables or disables supply the control words, when the credit memory (128) indicates the availability of more than a threshold amount of credit, and reduces the amount of credit in the credit memory (128) according to the fee information for the part of the video signal for the decoding of which the control words are supplied.

Description

technical field [0001] The present invention relates to a method and apparatus for correcting video data signals for addressing active matrix electroluminescent display devices, particularly those having transistors for controlling the current flow through individual display elements. Background technique [0002] Matrix display devices employing electroluminescent, light-emitting display elements are well known. The display elements may comprise organic thin film electroluminescent elements such as light emitting diodes (LEDs) using polymeric materials or using conventional III-V semiconductor compounds. Current developments in organic electroluminescent materials, especially polymeric materials, have shown their ability to be practically used in video display devices. These materials typically consist of one or more layers of semiconducting paired polymers laminated between a pair of electrodes, where one layer is transparent and the other layer is a material suitable for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32H05B44/00
CPCG09G3/3291G09G2320/0295G09G2300/0842G09G2320/043G09G2320/029G09G3/3233G09G2320/0285
Inventor K·R·怀特
Owner KONINK PHILIPS ELECTRONICS NV