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Active matrix type display device

A display device and active matrix technology, which is applied in lighting devices, static indicators, instruments, etc., can solve the problems of uneven brightness of display panels, animation afterimages, etc., reduce display unevenness and animation afterimages, and improve display quality Effect

Active Publication Date: 2006-09-13
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the above-mentioned organic electroluminescent display device, there will be problems of uneven brightness of the display panel and image sticking of the animation.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0047] An active matrix organic electroluminescent display device according to a first embodiment of the present invention will be described below with reference to the drawings. figure 1 An equivalent circuit diagram of the organic electroluminescence display device is shown. figure 1 Of the plurality of pixels arranged in a matrix on the display panel, only the pixels 210A in the first row and the pixels 210B in the second row are displayed. The pixels 210A, 210B are adjacent to each other in the column direction. In addition, in figure 1 neutralize Figure 9 The same constituent parts are assigned the same reference numerals and their descriptions are omitted. Hereinafter, although TFT213 for pixel selection and TFT220 for precharging are N-channel type, and TFT214 for driving is P-channel type, it demonstrates that this invention is not limited to these channel types.

[0048]In the pixel 210A, a precharge TFT 220 is connected between the source and the gate of the d...

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PUM

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Abstract

A variation in a display image and duration of a residual image are reduced to improve quality of display of an active matrix type display device. A control circuit sequentially outputs a pre-charge pulse signal PCG 1 and a storage capacitor control pulse signal SC 1 in synchronization with a falling edge of a vertical start pulse signal STV. A pre-charge TFT in a pixel in a first row is turned on according to the pre-charge pulse signal PCG 1. As a result, a source and a gate of a driver TFT are short-circuited, both an electric potential at the gate and an electric potential at the source of the driver TFT become a positive power supply electric potential PVdd, and the driver TFT is turned off. After that, the storage capacitor control pulse signal SC 1 rises to a high level, and the electric potential at the gate of the driver transistor is raised by capacitive coupling. With this, electric characteristics of the driver TFT are initialized.

Description

technical field [0001] The present invention relates to an active matrix display device having a light emitting element such as an electromechanical light emitting element. Background technique [0002] In recent years, display devices used to replace cathode ray tubes (CRTs) and liquid crystal displays (LCDs) have developed organic electroluminescent devices (Organic ElectroLuminescent Devices, hereinafter referred to as "organic electroluminescent devices"). Excite light display device. In particular, an active matrix organic electroluminescent display device having a thin film transistor (Thin Film Transistor, hereinafter referred to as "TFT") as a switching element for driving an organic electroluminescent element has been developed. [0003] Hereinafter, an active matrix organic electroluminescent display device will be described with reference to the drawings. Figure 9 is an equivalent circuit diagram of an organic electroluminescent display device. Figure 9 Of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/30G09G3/20H05B33/08H05B33/14H05B44/00
Inventor 松本昭一郎
Owner SANYO ELECTRIC CO LTD
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