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Display substrate, manufacture method thereof, display panel and mask plate

By introducing an auxiliary electrode in parallel with the cathode layer in the organic light-emitting diode display panel and optimizing the deposition position of the cathode layer, the problem of resistance voltage drop of the cathode layer is solved and the picture quality is improved.

Inactive Publication Date: 2015-05-27
BOE TECHNOLOGY GROUP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the cathode layer is formed by sputtering ITO, the light-emitting layer will be easily damaged and reduce the luminous efficiency of the organic light-emitting diode display panel
[0004] As mentioned above, the cathode layer can also be formed by evaporating a transparent method with good reflectivity, but the cathode layer formed in this way usually has a large resistance, and a large resistance voltage drop (IR) will be generated when it is displayed. Drop), eventually reducing the picture quality of the display panel

Method used

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  • Display substrate, manufacture method thereof, display panel and mask plate
  • Display substrate, manufacture method thereof, display panel and mask plate
  • Display substrate, manufacture method thereof, display panel and mask plate

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Embodiment approach

[0073] As a preferred embodiment of the present invention, the display substrate may further include a spacer 40 that insulates and separates the auxiliary electrode 22 from the anode 21 . The spacer 40 can ensure that the auxiliary electrode 22 is reliably insulated from the anode 21 . In the present invention, the specific shape of the spacer 40 is not specifically limited, as long as it can insulate and space the auxiliary electrode 22 from the anode 21 . Specifically, an insulating space 23 is respectively formed on both sides of each auxiliary electrode 22, and a spacer 40 is arranged in each of the insulating space 23, and a part of the spacer 40 is set in the corresponding insulating space 23, and the other part It protrudes from the anode layer to insulate the auxiliary electrode 22 from the adjacent anode 21 .

[0074] As mentioned above, the auxiliary electrode 22 should be arranged at a position that does not affect the normal light emission of the display panel. ...

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Abstract

The invention provides a display substrate. The display substrate comprises an anode layer, a cathode layer, and a luminous layer arranged between the anode layer and the cathode layer, wherein the anode layer comprises a plurality of anodes; the display substrate further comprises at least one auxiliary electrode; the auxiliary electrode and the anodes are formed at intervals in an insulated way; the auxiliary electrode is in contact with the cathode layer in a parallel connection way, so that the overall resistance formed after the auxiliary electrode is connected with the cathode layer in parallel is smaller than the resistance of the cathode layer. The invention further provides a display panel, a manufacture method of the display substrate, and a mask plate. The cathode resistance voltage drop (namely IR drop) of the display substrate is small, so that loss of electrical signals cathode layer in the cathode layer and the auxiliary electrode is small, and relatively higher image quality can be obtained.

Description

technical field [0001] The present invention relates to the field of organic light emitting diode (OLED, Organic Light Emitting Diode) display devices, in particular, to a display substrate, a display panel including a display substrate, a method for manufacturing the display substrate, and a method used in the method. mask board. Background technique [0002] The display substrate of the organic light-emitting diode display panel includes a thin film transistor array and a light emitting element array, the thin film transistor array includes a plurality of thin film transistors, and the light emitting element array includes an anode layer, a cathode layer, and a layer arranged between the anode layer and the cathode The emissive layer between layers. The anode layer includes a plurality of anodes, and the anodes are connected to the drains of the thin film transistors in a one-to-one correspondence. [0003] Usually, the cathode layer is formed by sputtering a transparent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/32H01L51/52H01L51/56C23C14/04H10K99/00
CPCC23C14/042H10K59/122H10K71/166H10K59/80522H10K50/814H10K50/824H10K59/00H10K71/00C23C14/04
Inventor 宋泳锡刘圣烈崔承镇金熙哲
Owner BOE TECHNOLOGY GROUP CO LTD
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