Display device
A technology for display devices and display panels, applied to static indicators, instruments, etc., capable of solving problems such as differences in brightness, differences in pixel drive characteristics, and error sensing
Pending Publication Date: 2022-05-10
LG DISPLAY CO LTD
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Problems solved by technology
When the time required for sampling the threshold voltage Vth of the thin film transistor is insufficient, the threshold voltage Vth of the thin film transistor is erroneously sensed so that a difference in driving characteristics between pixels may occur
Even if data of the same gradation is written to all pixels, the difference in driving characteristics between pixels will cause a difference in luminance, and spots will be seen on the screen
Method used
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[0036]Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. Throughout the disclosure, the same reference numerals denote substantially the same components. In the following description, when a detailed description of known functions and configurations related to the present invention incorporated in the present invention would rather obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, part names used in the following description may be chosen in consideration of easier writing of this application, and they may be different from those of actual products.
[0037] In describing components of the present invention, terms such as first, second, A, B, (a), (b) and the like may be used. These terms are only used to distinguish one component from other components, and these terms do not limit the nature, sequence, quantity, etc. of the components. Wh...
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The invention relates to a display device, comprising a display panel on which a plurality of gate lines, a plurality of data lines and a plurality of sub-pixels are arranged; a gate driving circuit; and a data driving circuit, each sub-pixel including: a light emitting device; a driving transistor driving the light emitting device and including a first node connected to a first driving voltage line, a second node as a gate node, a third node electrically connected to the light emitting device; a first transistor electrically connected between the third node and the data line; a third transistor electrically connected between the first node and the second node; a fourth transistor electrically connected between the third node and the light emitting device; and a seventh transistor electrically connected between the third node and a second driving voltage line and applying a first voltage to the third node, the seventh transistor performing an on operation and applying the first voltage to the third node before the first transistor performs the on operation, a first voltage applied to the third node is transmitted to the second node via the first node.
Description
[0001] This application claims the benefit of Korean Patent Application No. 10-2020-0148505 filed on November 9, 2020, the entire contents of which are hereby incorporated by reference for all purposes as if fully set forth herein. technical field [0002] The present invention relates to a display device that compensates a threshold voltage Vth of a driving transistor according to a source follower internal compensation method. Background technique [0003] Active matrix type organic light emitting diode display devices include organic light emitting diodes (OLEDs) that emit light by themselves, and have advantages of fast response speed, high luminous efficiency, high luminance, and wide viewing angle. [0004] An organic light emitting diode, which is a self-luminous device, includes an anode electrode, a cathode electrode, and an organic compound layer (HIL, HTL, EML, ETL, and EIL) formed between the anode electrode and the cathode electrode. The organic compound layer i...
Claims
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IPC IPC(8): G09G3/3266
CPCG09G3/3266G09G3/3258G09G2310/08G09G2320/045G09G2330/12G09G2310/0216G09G2310/0262G09G2300/0469G09G3/3275G09G2320/0233G09G2310/0294
Inventor 柳成彬
Owner LG DISPLAY CO LTD