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Light-emitting control circuit, light-emitting control method and shift register

A light-emitting control circuit and light-emitting control signal technology, which is applied in the field of shift registers and light-emitting control circuits, can solve the problems of large ITO voltage drop, reduced efficiency, and increased power consumption.

Active Publication Date: 2012-10-31
BOE TECH GRP CO LTD
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Problems solved by technology

Traditional passive matrix organic light-emitting display diodes (PMOLED) require a shorter driving time of a single pixel as the display size increases, so it is necessary to increase the transient current and increase power consumption; at the same time, the application of high current will cause ITO The voltage drop on the line is too large, and the OLED operating voltage is too high, thereby reducing its efficiency

Method used

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  • Light-emitting control circuit, light-emitting control method and shift register
  • Light-emitting control circuit, light-emitting control method and shift register
  • Light-emitting control circuit, light-emitting control method and shift register

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Embodiment Construction

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0055] For active matrix liquid crystal displays (AMLCDs), gate drive circuits are used to generate the row gating control of the array of pixel circuits. However, for AMOLED (active matrix organic light-emitting diode) displays, OLED is a current-driven device, so controlling the current path flowing into OLED can control the light emission of OLED device. Therefore, in order to accurately control the light emission of the OLED in an AMOLED (active matrix organic light emitting diode) display, the present invention provides a light emission contro...

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Abstract

The invention provides a light-emitting control circuit, a light-emitting control method and a shift register. The light-emitting control circuit comprises an input terminal, an input sampling unit, an output unit, a reset unit, an output pulling-down unit and a light-emitting control signal output terminal, wherein the input sampling unit is used for sampling an input signal under the control of a first clock signal, the output unit generates a light-emitting control signal under the control of a second clock signal after the input signal is sampled by the input sampling unit, and the reset unit is used for resetting the light-emitting control signal under the control of a third clock signal through the output pulling-down unit. The invention can ensure that an OLED (Organic Light Emitting Diode) device is in a closed state in a process of writing display data into a pixel unit, and after the display data are written into the pixel unit, the OLED device is switched on to emit light so as to ensure that a display image cannot flicker due to the unstable state of a pixel circuit when the data are written into the pixel unit.

Description

technical field [0001] The invention relates to the field of organic light-emitting display, in particular to a light-emitting control circuit, a light-emitting control method and a shift register. Background technique [0002] Organic light-emitting display diodes (OLEDs) have been increasingly used in high-performance displays due to their advantages such as high brightness, wide viewing angle, and fast response speed. Traditional passive matrix organic light-emitting display diodes (PMOLED) require a shorter driving time of a single pixel as the display size increases, so it is necessary to increase the transient current and increase power consumption; at the same time, the application of high current will cause ITO The voltage drop on the line is too large, and the OLED operating voltage is too high, thereby reducing its efficiency. The active matrix organic light-emitting display diode (AMOLED) can solve these problems well by scanning the switching tubes to input OLED...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32H05B44/00
CPCG11C19/28G11C19/184G09G3/32G09G2300/0861G09G3/3266G09G2310/0286H05B33/0896H05B45/60
Inventor 金泰逵金馝奭王颖
Owner BOE TECH GRP CO LTD
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