Pixel circuit structure and display device applying same
A pixel circuit and electrical connection technology, applied in the field of display, can solve problems such as increasing product cost, decreasing panel display performance, increasing process steps, etc., and achieves the effects of reducing power line resistance, increasing storage capacitance, and reducing data line resistance
Active Publication Date: 2017-08-25
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] In the design of medium-sized high-PPI panels, smaller-sized and lower-resolution panels have larger RC load (resistive voltage drop), which will cause VDD (that is, the power line of thin-film transistors) and VDD in the LTPS OLED process. data (that is, display data lines or display signal lines) and other IR drops are more serious, resulting in a significant drop in panel display performance. At the same time, in high PPI panels, the pixel size is getting smaller and smaller, and the width of the signal line is greatly limited by the process conditions. , part of the Cst will be sacrificed to ensure the layout of the pixel circuit structure. In order to reduce the resistance load and increase Cst, it is necessary to change from adding Mask or changing materials, which will greatly increase the steps of the process. increase product cost
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[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details being omitted, or other methods, components, devices, steps, etc. may be adopted.
[0039] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. Also it will be understood that when an element or layer is referred to as being "on" another ...
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The invention provides a pixel circuit structure and a display device applying the same. The pixel circuit structure comprises a metal shielding layer, at least one buffer layer formed on the metal shielding layer, a thin film transistor formed on the at least one buffer layer, an insulating layer formed on a grid electrode of the thin film transistor, and a second grid electrode which is formed on the insulating layer and forms a storage capacitor with the grid electrode, wherein the second grid electrode is electrically connected with a power line of the thin film transistor, and the metal shielding layer is electrically connected with the power line of the thin film transistor. Parallel connection of the metal shielding layer and the power line is formed through electrically connecting the metal shielding layer and the power line of the thin film transistor, so that the resistance of the power line is reduced, the load of a panel is reduced, and the resistance voltage drop IR drop is reduced; and the storage capacitor Cst is increased at the same time.
Description
technical field [0001] The present disclosure relates to the field of display technology, in particular, to a pixel circuit structure and a display device using the same. Background technique [0002] OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) is a display lighting technology that has gradually developed in recent years, especially in the display industry. It is one of the hotspots in the field of flat panel display research. , high contrast, flexibility, low energy consumption, low production cost, self-illumination, wide viewing angle and fast response, etc. At present, OLEDs have begun to replace traditional LCD displays in the display fields of mobile phones, PDAs, and digital cameras. It is considered to have broad application prospects and has important research significance. In particular, top-emitting OLED devices have become the main direction of research due to their higher aperture ratio and the use of microcavity effects to optimize light ...
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IPC IPC(8): H01L27/32
CPCH10K59/1213H10K59/1315H10K59/1216H10K59/126
Inventor肖丽玄明花陈小川杨盛际刘冬妮付杰王磊卢鹏程
OwnerBOE TECH GRP CO LTD