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PIXEL AND ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE including same

A technology of light-emitting diodes and display equipment, which is applied to static indicators, instruments, etc., can solve the problems of increased brightness of OLED display equipment, and achieve the effect of preventing the gradual increase of brightness and reducing leakage current

Pending Publication Date: 2021-05-11
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, under low-frequency driving, the gradual positive shift of the threshold voltage may gradually increase the brightness of OLED display devices

Method used

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  • PIXEL AND ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE including same
  • PIXEL AND ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE including same
  • PIXEL AND ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE including same

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Experimental program
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Embodiment Construction

[0047] Hereinafter, embodiments of the inventive concept will be explained in detail with reference to the accompanying drawings.

[0048] figure 1 is a circuit diagram illustrating a pixel 100 of an organic light emitting diode (OLED) display device according to example embodiments.

[0049] see figure 1 The pixel 100 of the OLED display device may include a capacitor CST, first to ninth transistors T1, T2, T3, T4, T5, T6, T7, T8 and T9, and an organic light emitting diode (OLED) EL.

[0050] The capacitor CST may store the data voltage VDAT supplied through the data line DL. In some example embodiments, the capacitor CST may be referred to as a storage capacitor. For example, if figure 1 As shown in , the capacitor CST may include a first electrode coupled to the first node N1 and a second electrode coupled to the second node N2.

[0051] The first transistor T1 may transmit the first power voltage ELVDD to the first node N1 in response to the first initialization signa...

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PUM

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Abstract

The invention provides a pixel and an organic light emitting diode display device including the same. The pixel includes a capacitor coupled between first and second nodes, first and second transistors, each including a gate receiving a respective initialization signal, a first terminal receiving a first power supply voltage, and a second terminal coupled to the capacitor, a third transistor including a first terminal coupled to a data line and a second terminal coupled to the first node, a fourth transistor including a gate coupled to the second node, a first terminal receiving the first power supply voltage, and a second terminal coupled to a third node, a fifth transistor including a first terminal coupled to the third node and a second terminal coupled to the second node, sixth and seventh transistors receiving a scan signal, eighth and ninth transistors receiving an emission signal, and an OLED.

Description

technical field [0001] The present disclosure generally relates to a display device, and more particularly, to a pixel of an organic light emitting diode (OLED) display device and an OLED display device including the pixel. Background technique [0002] Especially when OLED display devices are employed in portable devices such as smartphones, tablet computers, etc., it is highly desirable to reduce power consumption in OLED display devices. Recently, in order to reduce power consumption of OLED display devices, low frequency driving techniques have been developed. The low frequency driving technique drives or refreshes the display panel of the OLED display device at a frequency lower than a normal frequency (eg, an input frame frequency) at which the display panel is driven. [0003] When the display panel of an OLED display device is driven at a low frequency, a gate-source voltage having a high absolute value may act as A bias voltage is applied to the drive transistor o...

Claims

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Application Information

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IPC IPC(8): G09G3/3208G09G3/3291
CPCG09G3/3208G09G3/3291G09G2330/021G09G2320/045G09G2300/0861G09G3/3233G09G2300/0819G09G2300/0842G09G2340/0435G09G2310/0251G09G3/32G09G2300/0469G09G2300/0809G09G2310/0243G09G2300/0439G09G3/3266G09G2310/066G09G2320/0653G09G2330/028
Inventor 金那英金东辉金喆镐朴允桓全珍崔现旭
Owner SAMSUNG DISPLAY CO LTD