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Display device and driving method of the same

一种显示设备、驱动器的技术，应用在静态指示器、照明装置、光源等方向，能够解决亮度均衡性恶化、电容器充电或放电速度变慢等问题

Active Publication Date: 2009-07-01
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the voltage between the gate and the source is close to the threshold voltage, the charging or discharging speed of the capacitor becomes slower due to the rapid decrease of the current flowing to the TFT
Therefore, since the capacitor cannot be fully charged or discharged within a compensation time period, the threshold voltage may not be stored in the capacitor, and thus, the luminance uniformity due to the deviation of the threshold voltage may still be deteriorated.

Method used

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  • Display device and driving method of the same
  • Display device and driving method of the same
  • Display device and driving method of the same

Examples

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Embodiment Construction

[0030] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout the specification.

[0031] It will be understood that when an element or layer is referred to as being "on" or "connected to" or "coupled to" another element or layer, it can be directly on or connected or coupled to another element or layer. elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another elemen...

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PUM

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Abstract

A display device having a plurality of pixels, each pixel includes a light-emitting element, a storage capacitor, a driving transistor, a first switching transistor which supplies a data voltage to the storage capacitor in response to an on-voltage of a scanning signal, a second switching transistor which diode-connects the driving transistor in response to an on-voltage of a compensation signal,and a third switching transistor which supplies a driving voltage to the driving transistor in response to an on-voltage of a light emitting signal. The storage capacitor stores a control voltage depending on a threshold voltage of the driving transistor when the driving transistor is diode-connected, transmits the control voltage and the data voltage to the control terminal of the driving transistor, and a period in which the compensation signal is in an on-voltage state is longer than a period in which the scanning signal is in an on-voltage state.

Description

technical field [0001] The invention relates to a display device and a driving method thereof. Background technique [0002] A conventional display device includes a plurality of pixels arranged in a matrix, and displays an image by controlling the light intensity of each pixel according to given brightness information. An organic light emitting display is a display device that displays images by electrically exciting fluorescent organic materials and allowing the fluorescent organic materials to emit light. Organic light emitting displays are self-emissive display devices, and include low power consumption, wide viewing angles, and fast pixel response speeds, thereby easily displaying high-quality moving pictures. [0003] An organic light emitting display includes an organic light emitting diode ("OLED") and a thin film transistor ("TFT") that drives the OLED. TFTs are classified into polysilicon TFTs and amorphous silicon TFTs according to the type of active layer. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G2300/0852G09G2300/0861G09G2320/043G09G3/3266G09G3/3233G09G2300/0819G09G3/30G09G3/32G09G3/20H05B33/12
Inventor 高俊哲尹宁秀蔡钟哲
Owner SAMSUNG DISPLAY CO LTD
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