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El display, el display driving circuit and image display

a driving circuit and display technology, applied in the direction of electrical devices, semiconductor devices, instruments, etc., can solve the problems of difficult to reduce the horizontal scan period, difficult control and relatively high price, and difficulty in realizing a large-scale and high-definition display panel, so as to prevent flickering

Inactive Publication Date: 2005-02-10
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention has been accomplished in view of the above problems, and an object thereof is to prevent occurrence of flickering which is otherwise caused by a reduction in frame frequency.
With such constitution, it is possible to realize a driving circuit of the EL display apparatus capable of preventing the occurrence of flickering due to the reduction in frame frequency.

Problems solved by technology

Though the former configuration is simple in structure, it has a difficulty in realizing a large-scale and high-definition display panel.
However, it has problems of a technical difficulty in control and of a relatively high price.
Thus, it has been impossible to reduce the horizontal scan period, and, depending on the number of display columns, flickering occurs due to the reduction in frame frequency

Method used

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  • El display, el display driving circuit and image display
  • El display, el display driving circuit and image display
  • El display, el display driving circuit and image display

Examples

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Embodiment Construction

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

For easy understanding and / or illustration, each of the drawings in this description may have portions omitted and / or enlarged / reduced. For example, an encapsulating film 111 and the like are shown to be quite thick in the sectional view of a display panel at FIG. 11. On the other hand, an encapsulating cover 85 is shown to be thin in FIG. 10. There are omitted portions. For example, a display panel or the like according to the present invention needs to have a phase film such as a circularly polarizing plate for antireflection. However, such a phase film is omitted from the drawings used in this description. This holds true for other drawings. Like numerals, characters or the like designate parts having identical or similar forms, materials, functions or operations.

It is to be noted that the details to be described with reference to the drawings may be combined with other embodim...

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PUM

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Abstract

The EL display apparatus according to this invention is provided with an EL light emitting element, a current driving device for driving the EL light emitting element by a current responsive to a source signal represented by a current, and a signal current source (634) for outputting the source signal in response to image signal to the current driving device via a source signal line, the EL display apparatus being further provided with a precharge voltage source (631) for outputting a predetermined voltage and a switching and connecting unit (636, 637) capable of selectively connecting either the signal current source or the precharge voltage source to the source signal line (638).

Description

TECHNICAL FIELD The present invention relates to a light emitting display panel such as an EL display panel which uses an organic or inorganic electroluminescence (EL) element. Further, the invention relates to an EL display panel driving method, an EL display panel driving circuit, and an electronic display appliance using the method and the circuit. BACKGROUND ART In general, an active-matrix display apparatus has a multiplicity of pixels arranged in matrix and displays an image by controlling the intensity of light pixel by pixel in accordance with image signals given When, for example, liquid crystal is used as an electro-optic substance, the transmittance of each pixel varies in accordance with the voltage applied to the pixel. The basic operation of an active-matrix image display apparatus employing an organic electroluminescence (EL) material as an electro-optic converting substance is the same as in the case where liquid crystal is used. A liquid crystal display panel has...

Claims

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Application Information

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IPC IPC(8): G09G3/32H01L27/32
CPCG09G3/2018H01L27/3244G09G3/32G09G3/3233G09G3/325G09G3/3266G09G3/3283G09G3/3291G09G3/3426G09G2300/0408G09G2300/0426G09G2300/0814G09G2300/0819G09G2300/0842G09G2300/0852G09G2310/0205G09G2310/0232G09G2310/0248G09G2310/0251G09G2310/0262G09G2310/027G09G2310/0278G09G2310/08G09G2320/0238G09G2320/0242G09G2320/0247G09G2320/0261G09G2320/041G09G2320/0606G09G2320/0626G09G2330/08G09G3/30H10K59/12
Inventor TSUGE, HITOSHITAKAHARA, HIROSHI
Owner PANASONIC CORP
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