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Display device with pre-charging arrangement

A display device, pre-charging technology, used in static indicators, instruments, etc., to solve problems such as high cost, inaccuracy, and current boosting defects

Inactive Publication Date: 2008-04-09
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, despite its success in quickly precharging the associated capacitance, current boosting has some drawbacks
Among other cases, these drawbacks relate inter alia to inflexibility, inaccuracy and / or high cost if current boosting is applied according to the prior art

Method used

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Examples

Experimental program
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Embodiment Construction

[0026] In order to fully understand the various embodiments of the present invention, the concepts of current boosting and voltage boosting are briefly discussed first.

[0027] Figure 3AA single light emitting diode 1 is shown, hereinafter referred to as LED 1, as in figure 1 part of the passive-matrix display described in . The LEDs 1 are current driven by a current source 6 and can be selected by a voltage source 7 in a passive matrix. Capacitance C1 directly associated with LED 1, along with capacitance C representing all associated capacitances of each LED to be charged in column 4 n are shown together. provided for precharging the associated capacitors C1 and C n The current boost source 8. Furthermore, the circuit shows switches S1 , S2 , S3 , S4 and S5 which are used to connect LED 1 to current source 6 , voltage source 7 and current boost source 8 .

[0028] exist Figure 3B shown in about Figure 3A current boosting scheme. exist Figure 3B The graph shown...

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PUM

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Abstract

The invention relates to a display device comprising a plurality of light emitting elements (1), wherein at least one of the elements has an associated capacitor (C1). The display device comprises pre-charging means (7;8) for generating a pre-charge signal for charging the associated capacitor (C1) at least partly. The pre-charging means (7;8) are adapted for generating a pre-charge signal comprising at least a first pre-charge signal in a first pre-charge stage and a second pre-charge signal in a second pre-charge stage. The pre-charge signal preferably comprises a current pre-charge signal followed by a voltage pre-charge signal. The combined pre-charge signal has the advantage of fast, but accurate pre-charging.

Description

technical field [0001] The invention relates to a display device comprising a plurality of light-emitting elements, at least one of which has an associated capacitance, the device comprising precharging means for generating a precharging signal for at least partially charging the associated capacitance . Background technique [0002] In an increasing number of display applications, light-emitting matrix displays, for example organic light-emitting displays or inorganic light-emitting displays, are used. The basic device structure of a light-emitting matrix display essentially consists of a structured electrode or anode, a counter electrode or cathode, and a light-emitting layer sandwiched between the anode and cathode. In passive matrix displays, the anode may consist of a set of separate parallel anode strips, also called anode columns (or anode rows depending on their orientation), where each anode strip is adapted to be connected to a current or voltage source . Furthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/20
CPCG09G2320/043G09G3/20G09G2310/0251G09G2320/0252G09G2320/029G09G3/3216G09G3/30
Inventor M·H·克莱恩D·T·德荣格S·L·G·图圣A·森佩R·洛斯P·J·斯尼德O·吉伊肯斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV